FormFactor - Cascade Unity Probe - Multicontact probe for RFIC engineering test
- Up to 12 contacts; any contact can be DC, Power, Logic to 500 MHz,or RF to 20 GHz
- Online design configuration tool helps you to specify your probe in minutes
- All designs are fully quadrant compatible
- Full solution includes probes, calibration substrates, stations, accessories and software
- Scalable architecture for future needs
The multi-contact Unity Probe provides highly flexible configurability, unprecedented durability and ease-of use for RFIC engineering test. Unlike “bent-to-order” needle-probe solutions, Unity probes are quickly “built-to-order” with a precision tip cluster featuring multiple independently compliant fingers to isolate chip components from probing stresses — maximizing probe life and durability. Each contact can be configured to one or several contact types and frequencies, and the Unity Probe delivers on the legendary quality you’ve come to expect from our comprehensive suite of probing solutions.
Use our online tool to capture your design requirements and receive a quote.
More Product Information

High-voltage/current Probes
- On-wafer power device characterization up to 10,000 V DC / 600 A
- Reduced probe and device destruction at high currents up to 20 A DC and 300 A pulse
- Increased isolation resistance and dielectric strength to provide full triaxial capability at high voltage (3,000 V) for low-leakage measurement

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Replace costly and inflexible test fixtures with easy-to-use probe tips
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Long lifetime – typically over 1,000,000 contacts
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GS/SG footprint up to 4 GHz and GSG up to 20 GHz
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High-power RF test: up to 30 Watts
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Test at temperatures from -60°C to 200°C

Flexibility
- Different substrate carriers for wafers up to 200 mm or single dies
- Probe cards and/or up to eight positioners
- Optional thermal chuck (-60°C to 300°C) and pressure regulation
- Accessories available, such as black bodies and optical motion analysis tools
- Optional upgrade for 300 mm wafer
- Designed for industrial environments
- Covers wide range of measurements (I-V, C-V, RF, MEMS, OPTO)
- Ideal for small structures
See "Specifications & Details" tab for more key features

- Designed for use with specific Probe Systems
- Tables to suit all facility requirements and applications
- Stable probing, even in submicron range
- Granite platen ensures rigidity and temperature stability
- Can be combined with the Shield Enclosures

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Ease of use – Less experienced operators can perform DC measurements by simply pushing a button. This reduces the need of experienced users full time on each system.
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Reduced Soak Time – The system will automatically re-align the probes to the pads if they drift from alignment. This reduces test time and increases throughput.
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Unattended Use – Measurements can be left running over night or the weekend, testing all devices on the wafer, and at different temperatures without the need of an operator.

Flexibility
- DC, AC and RF/microwave device characterization, 1/f, WLR, FA and design debug
- Full thermal range of -60°C to +300°C
- Compatible with TopHat or IceShield
- Usage of manual and motorized positioners, probe cards within EMI-shielded environment
- Upgrade path to meet your future needs
- Stable and repeatable measurements over a wide thermal range
High accuracy and repeatability
- Reliable and repeatable contact
- Moisture-free, light-tight and EMI-shielded test environment with MicroChamber® technology
- Advanced EMI-shielding with PureLine and AttoGuard technologies available
- Superior low-leakage and low-noise measurements
- Safe and accurate hands-off testing
- Minimizes settling times for efficient measurements over full thermal range
See "Specifications & Details" tab for more key features

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Combination of DC and RF in a single probe module: One dual probe or a maximum of three RF; a maximum of 9 DC standard (other quantities upon request).
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Utilizes ACP tip design, GSG, GS or SG
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RF tips available from DC to 110 GHz
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Choice of BeCu or tungsten tips
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DC power needles come standard with 100 pF microwave capacitor
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Power bypass inductance: 8 nH
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Maximum DC voltage: 50 V without power bypassing (25 V with standard power bypassing, and component dependent with custom power bypassing)
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Ideal for probing the entire circuit for functional test
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Dual ACP configuration supports differential signaling applications
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DC probes can provide power or slow logic to circuit under test

Flexibility
- Ideal for a wide range of applications such as RF, mm-Wave and sub-THz characterization, FA, DWC, MEMS, optoelectronic tests and WL
- Re-configurable and upgradable as requirements grow
- Minimizes setup times with no loss in performance or accuracy
- Seamless integration of various measurement instruments
Stability
- Solid station frame
- Built-in vibration-isolation solution for superior vibration attenuation
- Rigid microscope bridge
- Compact and rigid mechanical design
- Highly accurate measurement results
- Incorporates best-known methods
Ease of Use
- Ergonomic and straightforward design for comfortable and easy operation
- Low-profile design
- Simple microscope operation
- Quick and ergonomic change of DUT through pull-out stage
- Minimize training efforts
- Fast time to data
- Convenient operation

- Choice of Series resistance or Termination (signal line to ground)
- Use of High Performance RF Resistors
- Choice of Resistor values available
- Choice of body styles, Infinity, ACP or FPC
- Can help to stabilize oscillations in high-gain devices
- Impedance match to low dynamic resistance laser diodes
- Custom configured for your application

FormFactor, Inc.
FormFactor, Inc. (NASDAQ:FORM) is a leading provider of essential test and measurement technologies along the full IC life cycle – from characterization, modeling, reliability, and design de-bug, to qualification and production test.
We constantly strive to help our customers solve the advanced test and measurement challenges of the broader semiconductor industry. Our focus on customer partnership, innovation, agility and operational excellence allows us to earn sustainable business every day.
Contact Details
FormFactor, Inc. Corporate Headquarters
7005 Southfront Road, Livermore, CA 94551, USA
Phone: 925-290-4000
Test & Measurement
