FormFactor - HPD Wet DR Series - Wet Dilution Refrigerator Systems
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Proven technology: designed in conjunction with several top STM groups in the world
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Quiet, low vibration operation
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Low running costs and reduced maintenance
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Easy operation and fast cool-down; load sample when the system is cold for TL models
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Calibrated RuO and CMN thermometry read by model 372S resistance bridge are installed on the mixing chamber plate
FormFactor’s wet dilution refrigerators has two series of products: the Wet DR-50/250/500 and Wet DR-50-TL/250-TL/500-TL.
Both series of dilution refrigerators enable easy and cost-effective cooling to temperatures between 35 to 10 mK.
The sample of Wet DR-50/250/500 systems is located in a normal vacuum (HV) space. It can be loaded when the system is warm with the vacuum can open.
The TL series has been optimized for scanning tunneling microscopy (STM) applications. The sample can be loaded into the ultra-high vacuum (UHV) space from the top of the dilution refrigerator insert when the cryostat is cold.
Custom wiring is available.
Both fully automated and manually operated gas handling systems are available.
More Product Information

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Light-tight version and EMI-shielded version for low noise and light-sensitive measurements
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Application flexibility, ideal for use in high frequency applications
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Sized to accommodate thermal chucks, laser cutter, and video equipment on the probe system
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Suitable for integration with vibration isolating tables

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Highly stable granite base
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Independent, coarse movement of X and Y axes, combined with easy fine adjustments down to submicron ranges
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Re-configurable for DC, RF, mmW, FA, WLR and more
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Multiple accessories: Thermal chucks, motorized microscopes and positioners, dark box, and more
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Low-profile, straightforward design
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Easy and ergonomic operation
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Front or backside instrumentation, e.g.: Integrating Sphere, Fiber setup, Pressure Module
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Front or backside probing capability

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Revolutionary technology advancement for wafer and die-level photonics probing
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Real-time in-situ calibrations
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Highest accuracy in test results
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Lowest coupling loss
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New innovative combination of hardware and software features to align and optimize fibers/arrays in a wafer-level trench
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Minimized coupling losses with minimal trench dimensions
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Industry standard for vertical coupling to wafer-level grating couplers
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Dark, shielded and frost-free
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-40°C to +125°C
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Pioneering set of automated functions that perform critical calibrations of the optical positioning system to the probe station
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Exclusive FormFactor-developed automated test methodology
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FormFactor-developed graphical user interface to manually control the optical positioning system
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Configurable between single fibers, fiber arrays and edge coupling holders

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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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Application flexibility: Coax, Triax, RF/mmW, High Power, Double Sided
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Temperatures range from -60°C to +300°C
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Up to 25% lower air consumption (CDA) than other systems on the market with no compromise in transition times
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Low Thermal Resistance Technology
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MultiSense with multiple temperature sensors
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Isolated from ground
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Includes a jack for grounding and biasing
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Advanced wafer vacuum system for warped/partial thin wafers
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Provides uniform vacuum across the entire wafer surface
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Advanced shielding technology

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Sample can be loaded or removed when the cryostat is cold
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High cooling power with sample in (He-3) liquid (400 mK with 400 microwatt cooling power)
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Sample probe and a load-lock with gate valve

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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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Independently cooled cold shield
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Probe positioners placed inside vacuum chamber
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Intuitive, manual drives
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Front loading capability through load door
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Independent control of linear chuck stage and positioners
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Contact/separation stroke for chuck

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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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Customizable sample space to fit the user’s application
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Long holding time: 100 hours for six (6) STP liter He-3 gas
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Stable He-3 pot temperature: Separate sippers for 1K pot and the charcoal sorb cooling line; +/- 0.5 mK at base temperature
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Low noise
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Multiple operation modes: He-3 cryostat can be operated without pumping the 1K pot (referred to as 4K operation mode)

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


