Tungsten Plate Price in Late May 2024

3.5x96x560mm tungsten plate price is 525.00 USD/PC in late May 2024, EXW XIAMEN, CHINA. 

Tungsten plates can be as thin as 0.01mm or as thick as 127mm, with widths typically ranging from 10mm to 800mm. They can be used in many different applications and is valued for its corrosion resistance, ability to withstand extremely high temperatures, and ability to create rigidity and hardness when combined with other metals in the alloy.

Tungsten is used in the aerospace, research, building materials and light bulb industries. It is the predominant metal in electric furnace heating elements, as well as in any assembly where high pressure/high temperature environments are expected. Plates made of tungsten are commonly used in furnace construction, but are also important for making parts for the electronics and semiconductor industries, and can be found in a variety of lighting, vacuum plating, electronic vacuums and shielding.

If you have any inquiry of tungsten plates, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

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Lanthanated Tungsten Electrode Price in Late May 2024

Ø3.2x175mm lanthanated tungsten electrode price is 2.20 USD/PC in late May 2024, EXW XIAMEN, CHINA.

WL20 electrodes contain at least 1.7% to 2.2% lanthanum for excellent arc starting, low burnout rate, good arc stability and excellent re-ignition characteristics. They are ideal if you want to optimize your welding capabilities. They can work well on either AC or DC electrode negatives with tips, or they can be used with AC sine wave power supplies. The tungsten electrode adding with rare earth element lanthanum holds sharp tips well, which is an advantage for welding steel and stainless steel on DC or AC from square wave power sources.

If you have any inquiry of tungsten electrodes, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

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Understanding the Emission Mechanism of Barium Tungsten Cathodes

The emission mechanism of a barium tungsten cathode involves a process called thermionic emission. Here's how it works:

Barium Deposition: In a barium tungsten cathode, a thin layer of barium is deposited onto the surface of a tungsten substrate. This is typically achieved through a process called barium flashing, where the cathode is heated in a vacuum chamber containing a small amount of barium metal. The heat causes the barium to vaporize and deposit onto the tungsten surface.

Activation: Once the barium is deposited, the cathode is subjected to further heating, which activates the barium layer. During this activation process, some of the barium atoms lose electrons, becoming positively charged ions (Ba+), while others absorb electrons, becoming negatively charged (Ba-).

Electron Emission: When the cathode is heated to its operating temperature, typically several hundred to a few thousand degrees Celsius, the electrons in the tungsten lattice gain enough thermal energy to overcome the work function of the material. The work function is the minimum amount of energy required to liberate an electron from the surface of a material. In the case of barium tungsten cathodes, the presence of the barium layer lowers the work function of the tungsten substrate, making it easier for electrons to escape.

Emission Current: Once emitted from the surface of the cathode, the electrons form a cloud or beam, depending on the application. This emission of electrons constitutes the cathode's emission current, which can be controlled and manipulated to generate the desired electron beam characteristics.

In summary, the emission mechanism of a barium tungsten cathode relies on the thermionic emission process, facilitated by the presence of a barium layer on the tungsten substrate. This process enables the efficient generation and emission of electrons from the cathode surface, making it suitable for various applications such as electron microscopy, X-ray tubes, and electron beam welding.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of barium tungsten cathode, please feel free to contact us:

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Exploring the Applications of Barium Tungsten Cathodes in Electronic Devices

Barium tungsten cathodes play a pivotal role in a wide range of electronic devices and applications due to their exceptional electron emission properties. These cathodes, composed of a mixture of tungsten and barium compounds, are utilized in various fields where reliable and high-performance electron sources are required. 

Here are some primary applications of barium tungsten cathodes:

X-ray Tubes: One of the most common uses of BaW cathodes is in X-ray tubes used for medical imaging, industrial inspection, and scientific research. In X-ray tubes, the cathode emits electrons when heated, which collide with a target material, producing X-rays. They ensure efficient electron emission, resulting in high-quality X-ray images with excellent resolution and clarity.

Electron Microscopy: BaW cathodes find extensive use in electron microscopy, a technique used for imaging and analyzing the microstructure of materials at the nanometer scale. In electron microscopes, the cathode generates a focused electron beam that interacts with the specimen, allowing for detailed imaging and analysis of its morphology, composition, and properties.

Vacuum Electronics: BaW cathodes are essential components in vacuum electronic devices such as traveling-wave tubes (TWTs), klystrons, and magnetrons. These devices utilize electron beams generated by the cathode to amplify and manipulate microwave signals in various communication, radar, and defense systems. They enable stable and high-intensity electron emission, ensuring reliable operation of vacuum electronics in demanding environments.

Electron Beam Welding and Cutting: In electron beam welding and cutting uses, BaW cathodes are employed to generate high-energy electron beams used for joining or cutting metal components. The intense heat generated by the electron beam enables precise and efficient welding or cutting of materials, making it suitable for manufacturing aerospace components, automotive parts, and electronic devices.

Electron Beam Lithography: BaW cathodes are also utilized in electron beam lithography systems, which are used for semiconductor fabrication and nanofabrication processes. In electron beam lithography, the cathode generates a focused electron beam that is used to pattern or write circuit patterns onto a substrate with high precision and resolution.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of barium tungsten cathode, please feel free to contact us:
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How Is Barium Tungsten Cathode Material Synthesized?

Barium tungsten cathodes are essential components in various electronic devices, including X-ray tubes and other vacuum electronics. These cathodes exhibit excellent electron emission properties, making them indispensable in applications requiring high-performance electron sources. However, the synthesis of barium tungsten cathode material is a crucial step in ensuring the functionality and efficiency of these devices.

The synthesis typically involves several intricate processes aimed at achieving the desired composition and structure. One common method for synthesizing this material is the powder metallurgy technique. In this method, finely powdered tungsten and barium compounds are mixed in precise proportions to form a homogeneous mixture. The mixture is then subjected to high temperatures in a controlled atmosphere, typically in a vacuum or inert gas environment. This process facilitates the chemical reaction between tungsten and barium, leading to the formation of barium tungstate (BaWO4) compounds.

Another approach to synthesizing the material involves chemical vapor deposition (CVD). In this method, volatile precursors containing tungsten and barium are introduced into a reaction chamber, where they undergo thermal decomposition at elevated temperatures. The resulting vapors react on the substrate surface to form thin films of barium tungsten compounds. CVD offers advantages such as precise control over film thickness and composition, making it suitable for producing uniform and high-quality cathode materials.

Additionally, sputtering techniques can be employed for depositing barium tungsten films onto substrates. In sputtering, high-energy ions bombard a target composed of tungsten and barium, causing atoms to be ejected from the target surface. These ejected atoms deposit onto the substrate, forming a thin film of barium tungsten material. Sputtering allows for the deposition of thin films with controlled thickness and excellent adhesion to the substrate, making it suitable for coating complex geometries.

Overall, the synthesis of barium tungsten cathode material involves sophisticated techniques aimed at achieving precise composition, structure, and morphology. The choice of synthesis method depends on factors such as desired film properties, substrate compatibility, and production scalability. With advancements in materials science and deposition technologies, the synthesis continues to evolve, enabling the development of high-performance electron emission devices for various applications.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of barium tungsten cathode, please feel free to contact us:
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Exploring the Composition and Functionality of Barium Tungsten Cathodes

A barium tungsten cathode is a crucial component in various electronic devices, particularly in vacuum tubes and cathode ray tubes (CRTs). Its composition plays a significant role in determining its emission characteristics and overall performance.

Typically, a barium tungsten cathode consists of a substrate material, often made of tungsten due to its high melting point and mechanical stability. The tungsten substrate provides structural support and serves as the emitter surface for electron emission.

Embedded within onto the tungsten substrate is barium oxide (BaO) or barium strontium oxide (BaSrO). This layer acts as the source of electron emission when heated to high temperatures, a process known as thermionic emission. Barium is chosen for its low work function, which facilitates the release of electrons from the cathode surface.

Additionally, small amounts of other materials may be added to the cathode composition to enhance its performance or stability. These additives may include rare earth oxides or other electron-emitting compounds to improve emission efficiency or prolong cathode lifespan.

During operation, barium tungsten cathodes are heated to a high temperature, typically several hundred to over a thousand degrees Celsius, depending on the application. This heating causes the barium oxide to emit electrons into the surrounding vacuum, creating an electron cloud or beam.

The emitted electrons can then be accelerated and focused by electric and magnetic fields within the vacuum tube, allowing for various applications such as amplification, signal processing, or display generation in CRT monitors and television sets.

Overall, the composition of a barium tungsten cathode is carefully engineered to balance factors such as electron emission efficiency, stability, and longevity, making it a vital component in many electronic devices. Continued research and development in cathode materials and manufacturing processes aim to further improve performance and expand the range of functionality for these essential components.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of barium tungsten cathodes, please feel free to contact us:

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E-Beam Tungsten Filament Price in Late April 2024

The latest price of φ0.8mm E-Beam tungsten filament is USD 2.20/PC, EXW XIAMEN, CHINA in the second half of April 2024. 

Tungsten filaments, also called cathodes or electron emitters or electron sources, are mainly made of high-quality tungsten. Of all pure metals, tungsten has the highest melting point (3422°C), the lowest vapor pressure at temperatures above 1650°C, and the highest tensile strength. Tungsten also has the lowest coefficient of thermal expansion of all pure metals. This combination of properties makes tungsten an ideal material.

Tungsten can be used in both thermionic electron guns and field-emission (CFE) electron guns. Electron beams come from filaments made of various materials. The most common is the tungsten hairpin gun, which is widely used in scanning electron microscopes, transmission electron microscopes, and microprobe systems. This filament is a tungsten ring that acts as a cathode. Apply voltage to the loop to heat it up. The anode, which is positive relative to the filament, forms a strong attraction to electrons. This causes electrons to be accelerated towards the anode. Some accelerate near the anode and down the column to the sample.

An electron gun works at a high temperature, which is required for thermionic emission. For this, a filament or the cathode should be of a material that has a high melting point in order for it to continuously emit electrons. Tungsten filament is folded with various shapes to help in focusing the electron beam.

If you have any inquiry of tungsten filaments, please feel free to contact us:
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2% Ceriated Tungsten Electrode Price in Late April 2024

The latest price of φ1.6x150mm ceriated tungsten electrode is USD0.80/PC, EXW XIAMEN, CHINA in the second half of April 2024. 

Ceriated tungsten electrode (WC20) is alloyed with about 2% cerium oxide. It is a non-radioactive, refractory or non-consumable metal electrode material, which is the preferred substitute for thorium tungsten electrodes. Regular diameter of the electrode is between 0.5mm and 12.0mm, and the length is 150mm and 175mm.

The addition of this small percentage of cerium oxide increases the electron emission qualities of the electrode which gives them a better starting characteristic and a higher current carrying capacity with no spitting. With the increase of cerium oxide content, the ablation resistance and arc starting of ceriated tungsten electrode will increase; with the increase of use time, the welding performance will gradually decrease.

The electrode has excellent arc starting properties at low current, and can operate successfully with AC or DC electrode negative. If used on higher current applications, the cerium oxide April be concentrated to the excessively hot tip of the electrode. In addition, WC20 is also used in inert gas shielded arc welding, hydrogen atom welding, argon arc surfacing, pulse argon arc welding, plasma welding, plasma cutting, plasma spraying, plasma melting, etc. The welding materials can be carbon steel, stainless steel, silicon copper, copper, bronze, titanium and so on.

If you have any inquiry of tungsten electrodes please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

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Tungsten Plate Price in Late February 2024

3.5x96x560mm tungsten plate price is 520.00 USD/PC in late February 2024, EXW XIAMEN, CHINA. 

Tungsten plates can be as thin as 0.01mm or as thick as 127mm, with widths typically ranging from 10mm to 800mm. They can be used in many different applications and is valued for its corrosion resistance, ability to withstand extremely high temperatures, and ability to create rigidity and hardness when combined with other metals in the alloy.

Tungsten is used in the aerospace, research, building materials and light bulb industries. It is the predominant metal in electric furnace heating elements, as well as in any assembly where high pressure/high temperature environments are expected. Plates made of tungsten are commonly used in furnace construction, but are also important for making parts for the electronics and semiconductor industries, and can be found in a variety of lighting, vacuum plating, electronic vacuums and shielding.

If you have any inquiry of tungsten plates, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Lanthanated Tungsten Electrode Price in Late February 2024

Ø3.2x175mm lanthanated tungsten electrode price is 2.00 USD/PC in late February 2024, EXW XIAMEN, CHINA.

WL20 electrodes contain at least 1.7% to 2.2% lanthanum for excellent arc starting, low burnout rate, good arc stability and excellent re-ignition characteristics. They are ideal if you want to optimize your welding capabilities. They can work well on either AC or DC electrode negatives with tips, or they can be used with AC sine wave power supplies. The tungsten electrode adding with rare earth element lanthanum holds sharp tips well, which is an advantage for welding steel and stainless steel on DC or AC from square wave power sources.

If you have any inquiry of tungsten electrodes, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

E-Beam Tungsten Filament Price in Early March 2024

The latest price of φ0.8mm E-Beam tungsten filament is USD 2.00/PC, EXW XIAMEN, CHINA in the first half of March 2024. 

Tungsten filaments, also called cathodes or electron emitters or electron sources, are mainly made of high-quality tungsten. Of all pure metals, tungsten has the highest melting point (3422°C), the lowest vapor pressure at temperatures above 1650°C, and the highest tensile strength. Tungsten also has the lowest coefficient of thermal expansion of all pure metals. This combination of properties makes tungsten an ideal material.

Tungsten can be used in both thermionic electron guns and field-emission (CFE) electron guns. Electron beams come from filaments made of various materials. The most common is the tungsten hairpin gun, which is widely used in scanning electron microscopes, transmission electron microscopes, and microprobe systems. This filament is a tungsten ring that acts as a cathode. Apply voltage to the loop to heat it up. The anode, which is positive relative to the filament, forms a strong attraction to electrons. This causes electrons to be accelerated towards the anode. Some accelerate near the anode and down the column to the sample.

An electron gun works at a high temperature, which is required for thermionic emission. For this, a filament or the cathode should be of a material that has a high melting point in order for it to continuously emit electrons. Tungsten filament is folded with various shapes to help in focusing the electron beam.

If you have any inquiry of tungsten filaments, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

2% Ceriated Tungsten Electrode Price in Early March 2024

The latest price of φ1.6x150mm ceriated tungsten electrode is USD0.50/PC, EXW XIAMEN, CHINA in the first half of March 2024. 

Ceriated tungsten electrode (WC20) is alloyed with about 2% cerium oxide. It is a non-radioactive, refractory or non-consumable metal electrode material, which is the preferred substitute for thorium tungsten electrodes. Regular diameter of the electrode is between 0.5mm and 12.0mm, and the length is 150mm and 175mm.

The addition of this small percentage of cerium oxide increases the electron emission qualities of the electrode which gives them a better starting characteristic and a higher current carrying capacity with no spitting. With the increase of cerium oxide content, the ablation resistance and arc starting of ceriated tungsten electrode will increase; with the increase of use time, the welding performance will gradually decrease.

The electrode has excellent arc starting properties at low current, and can operate successfully with AC or DC electrode negative. If used on higher current applications, the cerium oxide March be concentrated to the excessively hot tip of the electrode. In addition, WC20 is also used in inert gas shielded arc welding, hydrogen atom welding, argon arc surfacing, pulse argon arc welding, plasma welding, plasma cutting, plasma spraying, plasma melting, etc. The welding materials can be carbon steel, stainless steel, silicon copper, copper, bronze, titanium and so on.

If you have any inquiry of tungsten electrodes, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Tungsten Plate Price in Early February 2024

 3.5x96x560mm tungsten plate price is 520.00 USD/PC in early February 2024, EXW XIAMEN, CHINA. 

Tungsten plates can be as thin as 0.01mm or as thick as 127mm, with widths typically ranging from 10mm to 800mm. They can be used in many different applications and is valued for its corrosion resistance, ability to withstand extremely high temperatures, and ability to create rigidity and hardness when combined with other metals in the alloy.

Tungsten is used in the aerospace, research, building materials and light bulb industries. It is the predominant metal in electric furnace heating elements, as well as in any assembly where high pressure/high temperature environments are expected. Plates made of tungsten are commonly used in furnace construction, but are also important for making parts for the electronics and semiconductor industries, and can be found in a variety of lighting, vacuum plating, electronic vacuums and shielding.

If you have any inquiry of tungsten plate, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Lanthanated Tungsten Electrode Price in Early February 2024

Ø3.2x175mm lanthanated tungsten electrode price is 2.00 USD/PC in early February 2024, EXW XIAMEN, CHINA. 

WL20 electrodes contain at least 1.7% to 2.2% lanthanum for excellent arc starting, low burnout rate, good arc stability and excellent re-ignition characteristics. They are ideal if you want to optimize your welding capabilities. They can work well on either AC or DC electrode negatives with tips, or they can be used with AC sine wave power supplies. The tungsten electrode adding with rare earth element lanthanum holds sharp tips well, which is an advantage for welding steel and stainless steel on DC or AC from square wave power sources.

If you have any inquiry of tungsten electrodes, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

How to Customize Tungsten Probes for LED Wafer Testing?

In wafer testing, various types of tungsten probes are used to make electrical contact with semiconductor devices on the wafer. The choice of probe type depends on the specific requirements of the testing process. 

Here are some common types:

Wire Bonding Probes:

Customizing tungsten probes for LED wafer testing involves tailoring the probes to meet specific requirements and preferences based on the characteristics of LED components and the testing process. 

Here are the general steps:

Define Testing Requirements:

Understand the specific requirements of LED wafer testing, including the types of LED structures, pitch, and electrical characteristics that need to be tested.

Determine Probe Type:

Select the appropriate probe type based on the testing requirements. Common types include pogo probes and cantilever probes. Consider factors such as compliance, contact force, and suitability for fine-pitch LED structures.

Specify Tip Characteristics:

Define the characteristics of the tungsten tips. Consider the size, shape, and sharpness of the tips based on the dimensions and design of the LED components on the wafer.

Consider Flexibility and Compliance:

Evaluate the need for flexibility and compliance in the probe design. LED wafers may have variations in surface height or contour, so probes should be designed to adapt to these variations without causing damage.

Address Contact Force:

Determine the required contact force during testing. LED components can be sensitive, so probes with low-contact-force characteristics may be preferable to avoid damaging the structures.

Fine-Tune for Pitch and Density:

If the LED structures have fine pitches or high-density arrangements, ensure that the probes can make accurate and reliable contacts without causing shorts or damage.

Review Compliance Standards:

Ensure that the customized probes comply with industry standards and requirements for wafer testing. This may include standards related to electrical performance, materials, and safety.

Collaborate with Manufacturers:

Work closely with manufacturers or suppliers experienced in producing customized tungsten probes. Provide them with detailed specifications and collaborate on the design to ensure the probes meet the desired criteria.

Prototype and Test:

Before mass production, create prototypes of the customized probes and conduct testing on sample LED wafers. This step allows for refinement and adjustment of the probe design to ensure optimal performance.

Optimize for Cost and Efficiency:

Consider factors such as cost-effectiveness and manufacturing efficiency during the customization process. Optimize the design to achieve the desired performance while managing costs.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply various kinds of tungsten needles as per the drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of tungsten probes, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

What Are Tungsten Probes for LED Wafer Testing?

In wafer testing, various types of tungsten probes are used to make electrical contact with semiconductor devices on the wafer. The choice of probe type depends on the specific requirements of the testing process. 

Here are some common types:

Wire Bonding Probes:

Description: These probes are used for wire bonding applications, where wires are bonded to semiconductor devices for interconnection.

Application: Wire bonding is a common technique in semiconductor packaging, and tungsten wire bonding probes are used to make electrical connections between the chip and the package.

Tungsten probes used for LED (Light Emitting Diode) wafer testing are specialized probes designed for making electrical contact with LED devices during the testing and inspection processes. 

LED wafer testing involves assessing the electrical characteristics, functionality, and quality of individual LED components on a semiconductor wafer before they are packaged into final LED devices. They play a crucial role in facilitating these tests. 

Material Composition:

Tungsten: Tungsten is often chosen for probe tips due to its hardness, durability, and resistance to wear. These properties make tungsten probes suitable for making repeated and precise electrical contacts without significant degradation over time.

Probe Types:

Pogo Probes: Pogo probes, which are spring-loaded vertical probes, are commonly used in LED wafer testing. The spring-loaded design ensures reliable electrical contact even when the wafer surface may not be perfectly flat.

Cantilever Probes: Cantilever probes with tungsten tips can be used for LED wafer testing, particularly when precise positioning and contact with fine-pitch LED structures are required.

Features for LED Testing:

Fine Pitch Compatibility: LED structures on wafers often have fine pitches, and tungsten probes with fine tips are suitable for making contact with closely spaced LED elements.

Low Contact Force: LED components can be sensitive, and probes designed with low-contact-force characteristics help prevent damage to the LED structures during testing.

High Electrical Conductivity: Tungsten's high electrical conductivity ensures accurate electrical measurements during LED testing.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply various kinds of tungsten needles as per the drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of tungsten probes, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

What Types of Tungsten Probes Are There for Wafer Testing?

In wafer testing, various types of tungsten probes are used to make electrical contact with semiconductor devices on the wafer. The choice of probe type depends on the specific requirements of the testing process. 

Here are some common types:

Wire Bonding Probes:

Description: These probes are used for wire bonding applications, where wires are bonded to semiconductor devices for interconnection.

Application: Wire bonding is a common technique in semiconductor packaging, and tungsten wire bonding probes are used to make electrical connections between the chip and the package.

Vertical or Pogo Probes:

Description: These probes have a vertically oriented shaft that allows for vertical movement. They are often spring-loaded (Pogo probes) to provide compliance.

Application: Pogo probes are commonly used in automated testing equipment (ATE). They provide reliable electrical contact while accommodating variations in the wafer surface.

Cantilever Probes:

Description: Cantilever probes have a beam or arm structure that extends from a fixed base. They are often used for probing small and closely spaced features on a wafer.

Application: Cantilever probes are suitable for testing fine-pitch devices and for applications where precise positioning is required.

Vertical Buckling Probes:

Description: These probes have a unique design that allows for buckling in a controlled manner during contact. This design provides compliance and reduces the risk of damaging the wafer or probe tips.

Application: Vertical buckling probes are used in applications where controlled compliance is essential, such as when testing delicate or irregular surfaces.

Blade or Razor Probes:

Description: These probes have a thin, flat blade or razor-like tip. They are often used for contacting narrow or small test points on a wafer.

Application: Blade probes are suitable for applications where precision and minimal contact area are important.

Customized Probes:

Description: Manufacturers may produce customized tungsten probes based on specific requirements of the wafer testing process.

Application: Customized probes are designed for specific applications, addressing unique challenges or configurations.

The selection of a particular probe type depends on factors such as the size of the features being tested, the pitch between features, compliance requirements, and the overall testing environment.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply various kinds of tungsten needles as per the drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of tungsten probes, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com
Tel.: +86 592 5129696/+86 592 5129595

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Why Tungsten Probes Can Be Used for Wafer Testing?

Tungsten probes are commonly used for wafer testing due to several advantageous properties that make them suitable for this application:

Hardness: Tungsten is one of the hardest materials available, and this hardness helps in maintaining the sharpness of the probe tips. This is crucial for making precise and accurate contact with small features on semiconductor wafers.

High Melting Point: Tungsten has a very high melting point, making it resistant to melting or deforming at the high temperatures often encountered during wafer testing processes.

Electrical Conductivity: Tungsten is an excellent conductor of electricity. This property is vital for ensuring good electrical contact with the semiconductor devices on the wafer.

Chemical Inertness: Tungsten is chemically inert, meaning it does not easily react with other chemicals or materials. This is beneficial in environments where the probes may come into contact with various substances during testing.

Wear Resistance: Tungsten is known for its wear resistance, which is important for maintaining the longevity and performance of the probes over time, especially when making repeated contact with semiconductor wafers.

Thin Diameter: The tungsten-made probes can be manufactured with very thin diameters, allowing for precise and non-destructive testing of small features on semiconductor wafers without causing damage.

Stiffness: Tungsten-made probes can be designed to have the right balance of stiffness, allowing them to penetrate surface layers and make reliable electrical contact without being too rigid or too flexible.

These properties collectively make tungsten probes well-suited for the delicate and demanding task of wafer testing in the semiconductor industry. The ability to provide accurate electrical measurements without damaging the wafers is crucial for quality control and performance assessment during semiconductor manufacturing.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply various kinds of tungsten needles as per the drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of tungsten probes, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

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