FormFactor - Cascade FPC Probe - Rugged, deep reach RF probing for modules and circuit boards
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DC-40 GHz bandwidth
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10 ps rise time
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Low insertion and return loss
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2 mils of tip-to-tip compliance
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High probing angle and clearance
The FPC probe is a high frequency 50 ohm coaxial probe that offers a signal line with either one or two low-inductance fixed-pitch ground contacts. The probe tip structure is lithographically defined for unsurpassed impedance control, preserving the highest integrity possible when launching and receiving signals from SMT boards, hybrids and multi-chip modules(MCM).
- Maintains 50-ohm environment which allows accurate high-frequency measurement of microelectronic modules
- Compliant tips allow probing of non-planar structures
- BeCu tips provide longer probing life and reduce probe damage
- Access contacts close to components, module walls, or other obstructions
More Product Information

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Pulse tube cryocooler for cryogen free 4K temperatures
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He-3 sorption cooler for high power intercept and launch stage for ADR
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Single stage ADR provides solid state cooling down to 25mK
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Sample stage mounting at both 300mK and 30mK
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Multiple stage feedthroughs for thermally intercepting the signals
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Two large electrical bread boards for more configurable space
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Rapid cool options for faster cooldowns

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Quick and easy probe tip navigation
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Z drive can work in the same range as the chuck
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Enables higher separation gap while the DUT stays in focus
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Automatically configure and optimize performance
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24/7 operating
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Increased MTBF
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Protects the measurement setup
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Prevents involuntary mechanical contact between lens and probes

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Probe loss is 3 dB typical between 140 and 200 GHz, S11/S22 15 dB typical
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Reduced unwanted couplings and transmission modes
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Able to shrink pad geometries to 25 x 35 µm (best case)
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Typical contact resistance < 0.05 Ω on Al, < 0.02 Ω on Au
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WR15, WR12, WR10, WR8, WR6, WR4, WR3, and WR2 bands available.


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Low running costs, less vibration, less noise, reduced maintenance
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Large convenient experimental access: Up to 12 line-of-sight ISO100 ports located on perimeter of plates
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CMN calibrated thermometry on MC plate
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Operation via touch panel controller: Remote operation via ethernet interface

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Fully isolated experiment space for true 4K temperatures during probing
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Cryogenic positioners to provide large travel ranges without warming up the device
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Flexible thermal jumpers to ensure high thermal conductance and low mechanical transmission
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A soft vacuum bellows provides a compliant mounting interface for the cryocooler
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Quick release vacuum feedthroughs for easy configurability
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A large rectangular port for high signal capacity

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Die-to-die stepping time of under 100 ms
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Up to 20 dies/sec (70,000 dies/hour) with MultiDie Testing technology
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Even extreme variations in height, such as the case with warped wafers, can be compensated
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Interfaces to all major analysis instrumentation, optics software and testers
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Access to top side and bottom side of device under test (DUT)
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Highly accurate light measurement
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Test automation out-of-cassette for 24/7 operation


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High-quality construction with low-noise electrical performance
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Kelvin version for convenient 4-point measurements
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Replaceable coaxial probe tips, with choice of tip radii, and full electrical guard to the probe tip
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SSMC 50 connectors
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Ultra-low, fA and fF measurements from -65 º C to 150 º C

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
