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Interface Solutions for Precision Analog and Sensors

Medical, aerospace, autonomous vehicles, energy storage, human-machine interfaces, and cloud-connected sensors are part of what is driving the demand for faster and more-precise analog devices

Cohu IoT IoV Optoelectronic Market Solutions

Test Contactor (Socket) / Probe Head Solutions

cCompact Contactor

Ideal for multisite testing of analog and smart power devices requiring kelvin

Reduced site to site pitch concept enables high parallel test for power applications on strip-test and pick and place handler platforms

cDragon Contactor

Excellent RF Performance with Low Cost of Ownership

cDragon pin’s thermal design supports fast temperature control response and stabilization for repeatable at temperature testing of devices in a handler environment.

By design the cDragon’s pin decouples insertion motion from the test-interface-board side of the pin. This eliminates test-interface-board pad wear.

cDragon’s low profile and high bandwidth with low inductance makes it an ideal contacting solution for testing of mobile communications, RF switches, A/D converters, LNA’s, and PMIC devices. cDragon’s pins affinity to solder migration will ensure low and repeatable contact resistance.

cDragon can be used for testing any perimeter pad devices (QFN, DFN, PLCC) and leaded packages (QFP, SO).

cHybrid Turret Kelvin Contactor

For leaded and leadless devices down to 0.3 mm x 0.6 mm

Compact multi-beam pin structure for high density system integration on Turret Handlers with Side-by-side design for very small pad sizes.

cHybrid Kelvin contactor contains a new and unique contact spring architecture which allows the test socket to adapt to challenging IC pad geometry requirements of todays and future small package types. Great lifetime up to 3 million touchdowns, with best-in-class contact resistance repeatability reduces cost of test significantly. A multibeam contact structure optimizes signal integrity and current capability according to challenging electrical test requirements.

cHybrid Kelvin contactor with multibeam contact spring architecture delivers improved yield and long life which minimizing cleaning cycles. This innovative solution will help customers reduce cost and maximize productivity.

cPython Kelvin Contactor / Probe Head

High performance kelvin contact for high volume production test

cPython Kelvin contactors and probe heads provide superior electrical and thermal performance with significant cost savings. This makes cPython Kelvin ideal for lab and high-volume production test of analog and mixed signal integrated circuits – for applications such as power control, A-D and D-A converters, audio, video, power amplifiers, photonics, optical MEMS and sensors.

cPython Kelvin probes are electrically isolated and mechanically independent force and sense paths for true Kelvin contact for taking accurate measurements, even under high current conditions. These robust probes provide hundreds of thousands of insertions or touchdowns, and a bandwidth up to 26 GHz.  cPython Kelvin probes can land on 0.4 mm pitch targets, and their tip spacing is 90 µm to land on small targets. cPython probes are available with homogeneous tips to optimize performance.

cViper Probe Head

High Performance Probe Head for High Volume Production Test

cViper is an ultra-fine pitch probe head for RF and high speed digital WLCSP.  cViper is ideal for lab and large volume production test for precision analog, RF, sensors and mobility devices.  Low loop inductance and high bandwidth up to 27 GHz, cViper offers low and stable contact resistance for singulated devices or wafer-level test.   A variety of contact materials to optimize performance are available with device pitch down to 100 µm.

ecoAmp Kelvin Contactor

Cantilever contactor for high power applications

ecoAmp Kelvin is a high power cantilever kelvin contactor with patented spring and tip design for optimum heat dissipation. This ensures best reliability, long spring life and high yield even under highest current and temperature requirements.

Gemini Kelvin Contactor / Probe Head

Industry preferred high performance, high value, low cost true kelvin QuadTech contacting solution

Gemini Kelvin probes and contactors provide a first-rate solution that effortlessly makes reliable, true Kelvin contact for high-volume final test of both singulated packages and wafer-level devices. Gemini Kelvin is an ideal solution for devices such as power controllers, A-D and D-A converters, power amplifiers and audio and video circuits.

At 3.22 mm test height, the Gemini Kelvin is an excellent all-around spring probe with low inductance, high bandwidth, and excellent current-carrying capacity. The DUT side tip design accurately maintains its 100 µm spacing for the life of the probe. Customers report typical probe life of 500 k to 800 k package insertions, or over 2M touchdowns at wafer-level test. The offset tip allows manageable board layout with a board-side spacing of 0.4 mm.

MiCon Contactor

Proven cantilever technology for MCUs and ASICs

MiCon is spring pin footprint compatible supporting advanced temperature requirements as well as advanced power/current requirements. The footprint compatibility allows for easy and cost-efficient conversion from spring pin setups. The fully decoupled load board side of the spring ensure no degradation of the load board pad.

MiCon features a single piece design, which ensures a long lifespan, low and stable contact resistance, high current carrying capability and an extended temperature range. The MiCon allows for testing at full specification values. The extended operating range accommodates device lead trim and form variability such as device alignment accuracy and device lead coplanarity.

nanoKelvin Contactor

Kelvin test socket for high power plunge-to-board applications

nanoKelvin is a well-established cantilever kelvin contactor with proven performance in the automotive market and further increasing popularity due to the robustness and reliability of the product.

xWave Contactor / Probe Head

Broadband Production Solution for cmWave and mmWave up to 100 GHz

The xWave contactor utilizes patented hybrid contacting technology to optimize RF performance and provide robustness for production testing of the most challenging cmWave and mmWave devices. Inside the xWave contactor are embedded patch antennas and coplanar waveguides for both wireless and wired communication.

In addition to wireless communication xWave contactors minimize the number of transitions between the DUT and tester through the use of co-planar waveguide structures that make direct connection with the DUT, bypass the PCB, and connect to the tester with either coaxial cable or waveguides.

  • Applications

    • Amplifiers, comparators
    • Line drivers, current sourcing
    • Power management, voltage references
    • Sensors
    • Signal conditioning, PLLs
  • Device Requirements

    • High bandwidth
    • Low capacitance
    • Low inductance
    • Low noise
    • Low, repeatable resistance
  • Contactor Requirements

    • Low cost of ownership
    • Component placement close to DUT on test board
    • Low and stable contact resistance
    • Long run times between cleanings
    • Wide temperature range