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Interface Solutions for Mobility

Enabling the explosive growth in data traffic and processing

Cohu Mobility Market Test Solutions

Test Contactor (Socket) / Probe Head Solutions

ACE Contactor / Probe Head

RF (cmWave) probe with bandwidth up to 40GHz, homogeneous tip, and long life

ACE Test Contactor offers optimal RF performance for fine pitch FBGA, QFN and wafer-level packages for Power Amplifiers, RF switches and mobile communications. Supporting pitches down to 0.4 mm and superior performance for current consumption, gain, standard deviation, and power efficiency.

ACE Probe Head provides exceptional electrical performance, both DC and RF and is manufactured from HyperCore™ base material, which is a proprietary material of Cohu’s ECT Contact Product Group.

Compatible with all device types, platings, and pitches; and all test applications, including singulated devices, strip test and wafer-scale test. The materials and architecture create a very robust probe with a very working life and best yield. The electrical and mechanical performance, combined with the long probe life, deliver low overall cost of test, which are unprecedented for RF contactors.

Atlas Contactor / Probe Head

Optimal performance for large I/O count devices and high end digital test

QuadTech probe solution with cruciform tip strength that stands up to lateral force without bending, plus an enhanced compliance window to accommodate package stack height tolerance.

Atlas offers electrical performance that allows the customer to test to the true performance of the device. Atlas WLCSP test contactors achieve mechanical reliability with a rigid “cruciform” tip applied to Cohu’s QuadTech flat probe technology.  The Atlas offers a short electrical path, with lower capacitance and inductance, that is ideal for functional and AC parametric testing of WLCSP devices that require high system bandwidth and throughput gains in large multisite test applications.

The cruciform tip provides increased tip rigidity with a much greater immunity to breakage. The advantages for the customer include increased run times between contactor cleaning, increased probe life, increased yield, and reduced system down time for contactor maintenance.

cBoa Contactor / Probe Head

Uncompromised performance radial probe for the toughest test conditions

cBoa contactors and probe heads are the solution for contacting high frequency devices for package test or final test at wafer. The robust design and materials of the cBoa probe withstand the rigors of high-volume test by providing longer life and higher yield. The homogenous DUT side plunger provides longer run times between cleaning and increased probe life.

The cBoa features a stainless-steel spring for tri-temp testing and performs in operating temperatures of -55°C to +155°C. With a bandwidth up to 27 GHz, cBoa can be used to test some of the highest frequency devices.

The enhanced compliance window accommodates package stack height tolerances well.

cDragon Contactor

Excellent RF performance and reliability for tri-temp production test 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) and leaded packages (QFP, SO).

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

Radial wafer probe solution down to 100 µm pitch with low loop inductance and high bandwidth and optional manual actuator for testing singulated die

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.

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.

Mercury Contactor / Probe Head

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

Mercury probes and contactors are excellent spring probes for the laboratory though they were designed with the robust qualities needed for high-volume production test. Their unique design ensures excellent plating quality for low, consistent resistance, long life, and high-test yields. Mercury probes are available with minimum pitches of 0.3 mm, 0.4 mm, 0.5 mm, and 0.8 mm, to provide the best performance at any device pitch. Mercury probes have bandwidths of up to 22 GHz, and can carry over 3 Amps of current. The Mercury is an excellent choice for any test application.

RF Scrub

Excellent RF performance with low cost of ownership

Extremely short signal path rugged probe with high wear resistance for SO, DFN, and QFN packages

RF Scrub Contactor’s innovative design combines an extremely short signal path (0.90mm test height) with high wear resistance pins that can operate in a wide temperature range (-40º C to +150º C).

The RF Scrub contactor’s long-life, elastomer free design and easy field maintainability makes it an optimal solution for testing of high-performance devices.

The RF Scrub design minimizes load board wear and with the unique pin base material and plating, the cleaning intervals can last up to 100,000 cycles.

The RF Scrub contactor is adaptable to multiple packages (QFN/DFN/MLF, QFP, SO, SOT, TO) and handler platforms making it an ideal low-cost solution for your RF and acoustic applications.

xWave Contactor / Probe Head

Highest performance and most robust RF broadband production solution for package, wafer, or OTA test 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

    • 5G infrastructure / networks
    • Cloud computing
    • Wearables and IoT
    • Sensors & actuators
  • Device Requirements

    • Transmission line structures
    • Increased data rates
    • Transmission power
    • Receive sensitivity
  • Contactor Requirements

    • Fine pitch (<0.3 mm)
    • Low force (<10 g)
    • Fine alignment (20 µm)
    • Planarity (25 µm)
    • Parallelism (16x)
    • High frequency (6+ GHz)