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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Different substrate carriers for wafers up to 200 mm or single dies
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Probe cards and/or up to eight positioners
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Probe positioners placed inside vacuum chamber
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Short and stable probe arms
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Joystick controller
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Manual probe positioners with rotary feed-throughs
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Software control of chuck for fast step-and-repeat testing of the entire wafer
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Fast step-and-repeat testing of the whole wafer
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User-centered design minimizes training costs and enhances efficiency

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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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Ease of use – Less experienced operators can perform an RF calibration up to 500 GHz 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.
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Calibration Monitor and Re-calibration – System will
continuously monitor calibration drift, and automatically re-calibrate the system should the drift exceed a predefined limit.

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Different substrate carriers for wafers up to 200 mm or single dies
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Probe cards and/or up to eight positioners
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Probe positioners placed inside vacuum chamber
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Short and stable probe arms
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Joystick controller
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Manual probe positioners with rotary feed-throughs
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Software control of chuck for fast step-and-repeat testing of the entire wafer
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Fast step-and-repeat testing of the whole wafer
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User-centered design minimizes training costs and enhances efficiency

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Cryogen-free: cooling with two-stage pulse tube refrigerator (PTR)
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Low vibration
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Mechanical heat switch
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Internal charcoal sorption pump

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Provides an effectively noise free environment around the device under test (DUT)
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World’s first probe station with integrated TestCell Power Management (a TestCell is a connected set of equipment, including test software, instruments, probe station, thermal system, and related measurement accessories such as cables and on-wafer probes)
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Up to 4x faster flicker noise thermal testing on 30 μm pads
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Provides dark and dry environment for measuring light sensitive transistors, and devices at negative temperatures (<= -60°C) with frost free operation
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Provides fully managed and filtered AC power to the entire system – prober and instruments
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Filters harmful noise generated by external thermal control systems
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Reduced “antenna effect” injection of unwanted RF noise into the measurement path
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Provide up to 100dB attenuation (50Hz to 80Mhz) with 100mA max DC current handling
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Ultra-low, fA-level current and fF-level capacitance measurements from -65 °C to + 300 °C
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Enables full access to the chuck and the auxiliary sites
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Intuitive, and precise movement of chuck in X, Y, and Z-direction
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User-centered design minimizes training costs and enhances efficiency
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Test automation out-of-cassette for higher test cell efficiency for over-night/over-weekend operation

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Enables wafer probing up to 100 A pulsed and 10A DC
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Innovative multi-fingertip design provides even distribution of current
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Supports up to 500 V
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Replaceable Tungsten probe tips
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Temperature range of -60°C to 300°C
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Minimal contact resistance at the pad-tip junction to reduce heating during measurements, with fewer probe marks
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Prevents against thermal runaway
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Measure devices on wafer at higher currents than ever before
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Small scrub minimizes damage to aluminum pad
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Small footprint – tip fits on a 1 mm pad

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Supports up to 12 VNA ports than can be mapped to four logical ports for calibration
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Extensive guidance, wizards and management features automate calibration setup, measurement, result data conversion and report creation
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LRRM-SOLT, multi-line TRL and second-tier calibration methods enable precision and simple multi-port calibrations
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Automatic load inductance compensation function ensures the most repeatable calibrations
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Easy to use Probe to ISS/CSR matching tool
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Additional remoting methods
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Interface with Velox™ over LAN

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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

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
