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Probe Card Holders CNC Machining for Testing Equipment

Probe card holders are equipment for wafer probing and electrical characterizer test instruments. Zintilon CNC machining for probe card mounting rings, test interface holders, and contact alignment assemblies for critical wafer probing and electrical tests.
  • Machining for precise probe card alignment and contact planarity
  • Tight tolerances up to ±0.0003 in for electrical contact accuracy
  • Precision milling, drilling & flatness control
  • Support for rapid prototyping and full-scale production
  • ISO 9001-certified manufacturing with testing equipment expertise
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Why Semi-conductor Companies
Choose Zintilon

prductivity

Increased Productivity

Engineers get time back by not dealing with immature supply chains or lack of supply chain staffing in their company and get parts fast.

10x

10x Tighter Tolerances

Zintilon can machine parts with tolerances as tight as+/ - 0.0001 in -10x greater precision compared to other leading services.

world

World Class Quality

Zintilon provides aerospace parts for leading aerospace enterprises, verified to be compliant with ISO9001 quality standard by a certified registrar. Also, our network includes AS9100 certified manufacturing partners, as needed.

From Prototyping to Mass Production

Zintilon is certified for the ISO 9001 standard and supplies engineered components to semiconductor test equipment manufacturers, probe station suppliers, and automated test equipment (ATE) integrators worldwide.

Prototype Probe Card Holders

Receive highly precise assembly prototypes of your probe card holder to scale. Before commencing production of your testing equipment, verify contact planarity, electrical isolation, probe card interface compatibility, and measurement verification.

Key Points:

  • Rapid prototyping with high precision

  • Tight tolerances (±0.0003 in)

  • Test planarity, electrical isolation, and thermal stability early


3 Axis CNC Machined Stainless Steel Passivation

EVT – Engineering Validation Test

Planarity, electrical isolation, and thermal management of the probe card holder design and configuration must be sufficient for the construction of a prototype. Address the contact alignment and thermal expansion challenges to facilitate the probe card prototype holders electrical contaction and the probe card interface adjustments to the wafer testing system.

Key Points:

  • Validate prototype functionality

  • Rapid design iterations

  • Ensure readiness for production


Anodized Aluminum 1024x536

DVT – Design Validation Test

To evaluate the drawings of probe card holders for planarity control and the thermal stability, utilize a range of materials and holder geometries to study planar stability. This is required to achieve the testing equipment system performance aimed at optimal contact stability and measurement precision desired for production.

Key Points:

  • Confirm design integrity and planarity specifications

  • Test multiple materials and configurations

  • Ensure production-ready performance


design aluminium

PVT – Production Validation Test

Study systems for volume-based production of probe card holders and assess production of consistent systems prior to fully deploying to rectify uniformity and efficiency deficits within the manufacturing process flow.

Key Points:

  • Test large-scale production capability

  • Detect and fix process issues early

  • Ensure consistent part quality


Anodized Titanium Fastener

Mass Production

Manufacture precision probe card holders with high reliability for wafer testing and on-time delivery to manufacturers of semiconductor testing equipment and ATE systems.

Key Points:

  • Consistent, high-volume production

  • Precision machining for semiconductor quality

  • Fast turnaround with strict quality control


production

Simplified Sourcing for
the Semi-conductor Industry

Our aviation industry parts manufacturing capabilities have been verified by many listed companies. We provide a variety of manufacturing processes and surface treatments for aerospace parts including titanium alloys and aluminum alloys.

Explore Other Semiconductor Components

Browse our complete selection of CNC machined semiconductor components, crafted for durability and ultra-tight tolerances. From precision tooling and fixture parts to vacuum chambers and wafer handling systems, we deliver solutions tailored to advanced semiconductor production.

Testing Equipment, Probe Card Holders, Machining Capabilities

To deliver Probe Card Holders CNC machining for Testing Equipment, we integrate our machining experience with quality assurance of CNC multi-axis machining centers and modern systems for measuring flatness. All components are carefully engineered to ensure high-contact reliability and minimal planarity deviation for consistent performance over millions of touchdown cycles - single wafer probe card rings, multi-site test interface holders, and adjustable alignment systems with thermal compensation. Highly accurate CNC machining allows us to create probe card mounting surfaces with flatness tolerances down to ±0.005 mm, execute alignment pin drilling and electrical isolation feature position tolerances down to ±0.015 mm, and execute thread milling to fasten and retain the probes in the probe card and resist any induced vibrations. Additionally, we perform surface finishings to insulate electrically to avoid shorting, and to regulate control thermal insulation. Additional plane, dielectric, isolation and electrical grid tests are also conducted, as needed. To optimize thermal conductivity and lightweight, each probe card holder is produced in Aluminum 6061-T6 with the addition of ceramic (Al₂O₃, AlN) to optimize thermal insulation and management, PolyEtherEtherKetone (PEEK) with its chemical resistance and excellent dielectric properties, or other specific materials such as durable and cleanroom compatible stainless steel 304, electrically insulating and dimensionally stable G-10/FR-4 composites, or titanium alloys, and for low-weight structural applications, we use titanium alloys with a superior strength-to-weight ratio and significant thermal expansion for lightweight applications. We ensure excellent electrical isolation, resistance greater than 10¹² Ω, thermal conductivity within the region of 1 to 200 W/m.K for superior thermal management, working temperatures from -40°C to 150°C, and a flatness variation of ±10 µm on 300 mm dia. plane, for a uniform probe contact over the full surface of the wafer.
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Materials & Finishes

Materials
We provide a wide range of materials, including metals, plastics, and composites.
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Finishes
We offer superior surface finishes that enhance part durability and aesthetics for applications requiring smooth or textured surfaces.
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Specialist Industries

you are welcome to emphasize it in the drawings or communicate with the sales.

Aerospace

Source custom aerospace & aviation Parts

Automotive

Automotive custom quality parts

Medical

Custom parts for medical industry

Robotics

Custom CNC Machining Service for Robotics Parts

Automation

Automation custom parts from Zintilon

Consumer Goods

Consumer goods, custom parts by Zintilon

New Energy

Custom parts for new and renewable energy

Semi Conductor

Source custom semi-conductor parts

Materials for Probe Card Holders

Our CNC machine shop specializes in servicing probe card holders with over 10 different high-performance electrically insulating ceramics, thermally stable polymers, which support rapid prototyping, precision machining, and manufacture and maintain ATE and SEMI specs quality and consistency.

Stainless steel

Stainless steel Image

Stainless steel alloys have high strength, ductility, wear and corrosion resistance. They can be easily welded, machined and polished. The hardness and the cost of stainless steel is higher than that of aluminum alloy.

Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Aluminum

Aluminum Image

High machinability and ductility. Aluminum alloys have good strength-to-weight ratio, high thermal and electrical conductivity, low density and natural corrosion resistance.

Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.003 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Titanium

Titanium Image

Titanium is an advanced material with excellent corrosion resistance, biocompatibility, and strength-to-weight characteristics. This unique range of properties makes it an ideal choice for many of the engineering challenges faced by the medical, energy, chemical processing, and aerospace industries.

Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Steel

Steel Image

Steel is a strong, versatile, and durable alloy of iron and carbon. Steel is strong and durable. High tensile strength, corrosion resistance heat and fire resistance, easily molded and formed. Its applications range from construction materials and structural components to automotive and aerospace components.

Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.001 mm (routing)
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Bronze

Bronze Image

Highly resistant to seawater corrosion. The material’s mechanical properties are inferior to many other machinable metals, making it best for low-stress components produced by CNC machining.

Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Brass

Brass Image

Brass is mechanically stronger and lower-friction metal properties make CNC machining brass ideal for mechanical applications that also require corrosion resistance such as those encountered in the marine industry.

Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Copper

Copper Image

Few metals have the electric conductivity that copper has when it comes to CNC milling materials. The material’s high corrosion resistance aids in preventing rust, and its thermal conductivity features facilitate CNC machining shaping.

Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Zinc

Zinc Image

Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed.

Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Iron

Iron Image

Iron is an indispensable metal in the industrial sector. Iron is alloyed with a small amount of carbon – steel, which is not easily demagnetized after magnetization and is an excellent hard magnetic material, as well as an important industrial material, and is also used as the main raw material for artificial magnetism.

Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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Magnesium

Magnesium Image

Due to the low mechanical strength of pure magnesium, magnesium alloys are mainly used. Magnesium alloy has low density but high strength and good rigidity. Good toughness and strong shock absorption. Low heat capacity, fast solidification speed, and good die-casting performance.

Price
$ $ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
View More Details
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FAQs: Probe Card Holders for Testing Equipment Applications

Probe card holders are custom, precision machined holders that secure and align probe cards for electrical testing of semiconductor wafers in probe stations and automated test equipment. They consist of single wafer mounting rings with topological planarity less than ±10 ⎧ over 300 mm in diameter, and multiplexed test interface holders in which 2 to 4 probe card modules are independent height adjusted by ±50 µm, kinematic coupling assemblies are positioned and repetitively locked to within ± 5 µm, test holders which are stable within ±0.5 °C over the test duration, and quick change mounts that reduce the time to swap probe cards to under 2 minutes. The requirements include surface flatness within ±0.010 mm, parallelism to the chuck surface within ±0.015 mm, electrical isolation of the resistance is above 10¹² Ω at 500V, and thermal patterning is uniform within ±1 °C of the mounting surface. The holders must also accommodate probe card formats from 200 mm to 450 mm wafers and are designed to withstand over 100,000 touchdown cycles.

6061-T6, Aluminum has a thermal conductivity rating of 167 W/m·K which allows it to dissipate heat quickly from probe cards. It is also is lightweight with a density of 2.7 g/cm³ which lowers inertial loads when probing. Aluminum is also easy to work with and can be made to a surface flatness of ±0.008 mm, and with a thermal expansion coefficient of 23.6 µm/m·°C which is consistent with the probe card substrates. Ceramics (Al₂O₃, AlN) are harder and provide better thermal control as their conductivity varies from 20 to 200 W/m·K for higher thermal conductivity, and has a lower thermal expansion rate of 4 - 7 µm/m·°C, and a greater hardness which allows them to better withstand the mechanical cycles in repeated probing of probe cards giving them better wear characteristics. PEEK has a volume resistivity greater than 10¹⁶ Ω·cm which provides good insulation from electricity as well. PEEK has a low moisture diffusion of 0.5% giving it good stability in ranges which humidity, as well as maintaining a chemical resistance to solvents used in cleaning, and in residues left by flux of solder. PEEK also has a thermal stability of 250 °C which is required for many high test temperature applications.

Complex geometries of the holder are made through multi-axis CNC milling, where the flatness tolerances are ±0.008 mm and surface finishes are made to be below 1.6 Ra microns. Alignment pins are drilled with ±0.015 mm positional accuracy and 0.020 mm of perpendicularity, and for mounting the probe cards, high-speed machining is employed with ±0.005 mm control of the planarity for a surface 300 mm in diameter. Retention threads designed for secure clamping of probe cards are made with class 2B tolerances via thread milling. Critical mounting surfaces are first surface ground to a flatness of 0.003 mm per 50 mm. Ultra-flat, diamond turned reference surfaces have roughness values below 0.4 Ra microns. Precision lapping is the last step in planarity, with a final value of ±0.005 for optimum uniformity in probe contact; EDM is used to construct cooling channels and other thermal management components.

We maintain probe card mounting surface flatness of ±0.008 mm across a 300 mm diameter ensuring contact planarity within ±10 µm across the wafer, parallelism between the mounting surface and the chuck interface within ±0.015 mm for uniform probe pressure, positional accuracy of the alignment features to within ±0.015 mm for consistent probe card positioning, perpendicularity of mounting faces to within 0.020 mm for ideal electrical contact, concentricity of circular features to within ±0.025 mm for proper rotational alignment, surface finish of mounting surfaces to 1.6 Ra microns for frictionless probe card seating, and overall dimensional accuracy to within ±0.050 mm. These tolerances lend themselves to ensuring electrical contact cross all probe needles at less than ±5 percent variance, measurement repeatability at less than ±1 percent for parametric testing, and thermal planarity stability of ±10°C during contact for mechanical durability for over 100,000 probe touchdown cycles without degradation.

Yes, we provide rapid prototyping to verify fit and test assembly, with same-day CAD-to-part capability available for critical projects. For custom automation cells and research platforms, we perform low-volume production of 20 to 500 brackets. For standardized robot models, we perform high-volume production of thousands to tens of thousands of brackets annually, incorporating complete dimensional inspection, flatness verification, and material certifications.
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