Configure your own system: |
 6 Manipulated Stage, 2" Probe System |
The basic system includes: An open cycle, sample stage refrigerator, (4.2-475K), with calibrated silicon diode thermometry and stage heater. A high efficiency helium transfer line with foot valve for precise flow regulation. A cooled radiation shield, with cooled IR absorbing window above the sample is included. Designed for gas efficient 4.2 K operation. A 200mm diameter stainless steel vacuum chamber, with removable top lid, clear fused quartz viewport, (54mm clear view), and six equally spaced probe ports surrounds the sample radiation shield. A machined aluminum base plate, with six precision micro-manipulated probes, with travel of X=51mm, Y=25mm, Z=16mm. Probe arms feature thermal radiation shields, stainless steel welded bellows, and feedthrough ports. Probe mounts are dynamically cooled. One probe mount includes a Platinum thermometer installed and wired to a 6-pin feed though. (Probes and probe cables ordered separately below.) A Lakeshore Model 331S temperature controller, with calibrated silicon diode temperature sensor (DT670-SD-1.4H) to control and monitor sample temperature is included. One sample holder, (TT-CS-G) is included. The standard Zoom 70 microscope optics package from Desert Cryogenics does not require the user to lean over the system and peer into eyepieces. A CCD camera on the top of an optimized monoscope sends the image to a high-resolution 15 inch LCD color video monitor which can be viewed from anywhere near the system. The optics can be manipulated to view any part of a 50mm wafer, and in addition, can be retracted and swung away to allow sample change access to the top of the vacuum chamber. Sample illumination is coaxial, via a fiber optic from an adjustable light source and power supply. The standard monoscope has a zoom ratio of 7:1 and an ultimate resolution of 5 µm. A 12.5:1 zoom, or 16:1 zoom upgrade, is available with resolution of up to 4 µm* and to 3 µm* respectively.
*field systems with extended chamber heights may vary, decreasing resolution |
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Options: |
Model ZN50 Probes (50 Ohm Stripline probes) & Related Cables |
 These probes have an SMA connector mounted directly to an alumina ceramic blade with a 50-Ohm Stripline routed to the probe contact. The ZN50 probe base also incorporates a pair of copper braids that connect to the sample stage to cool/heat the probe to the sample temperature. They feature an easily replaceable alumina blade assembly, with SMA connector and tip. (see ZNR-50) The most commonly used probe is the ZN50-25-BeCu. Three available tip radii are ideal for: contacting pads (25, 50, 100, 200 µm tip); large features (25 µm tip); contacting small features (10 µm tip); and contacting very small features (3 µm tip). Tungsten tips are recommended for aluminum pads. BeCu tips are recommended for all others. Other tips, such as Paliney 7 or gold plated BeCu, are also available. The material and tip radius (in µm) are incorporated into the part number. The standard probes work at frequencies to 2 GHz. The ZN50-25-HF-BeCu probe has an increased bandwidth of 5 GHz. Select your initial probes below, (4 probes required), and order other material types and spares from the ZN50R blade assemblies listed as spare or replacements later in this section. |
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Please indicate the quantity of each probe to be added. |
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Z50 Cables (Priced per probe arm) |
Choose the cable configuration for your application. |
Probe cable, type Cu-SS-36/50 Ultra miniature cryogenic coaxial cable with SMA plug at probe end, and BNC feedthrough. The shield is grounded. (Shielded measurements to 50 MHz, 475 K.) |
Probe cable, type Cu-SS-36/50 Ultra miniature cryogenic coaxial cable with SMA connector at probe end to 3-lug triax feedthrough. (For low-leakage guarded measurements to 50 MHz, 475 K.) |
Probe cable, .085 stainless semi-rigid microwave coaxial cable with SMA plug at probe end and SMA jack at feed through end. (For measurements to 3 GHz, 425 K.) |
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Model GSG Probes (Coplanar waveguide probes) & Related Cables |
 These probes are made to Desert Cryogenics specifications by GGB Industries. They have optimized, low-thermal-conductivity coax leading to low-thermal-conductivity tips, which minimize the thermal impact of the probe. The contacts geometry is ground-signal-ground (GSG), with pitch (spacing), which is user-specified, usually 100 µm or 150 µm. The probe is specially manufactured to Desert Cryogenics proprietary design, with a copper braid assembly to cool the probe to near sample temperature. The contacts are held in fixed and precise positions by epoxy encapsulation, and the center pin position is known to be stable on repeated thermal cycling. The probes are available in three bandwidths: 0-40 GHz probes have K-connectors; 0-50 GHz have 2.4 mm connectors; and 0-67 GHz probes have 1.8 mm connectors. The model number for a probe is GSG-xxx-yy, where xxx is the pitch in microns and yy is the bandwidth in GHz. For example a 50 GHz bandwidth probe with 150-µm pitch is a GSG-150-50. GSG probes are geometrically interchangeable with Z50 probes. Microwave probes are limited to 400 K. |
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Model GSG-xxx-40 microwave probe, each
Model GSG-xxx-50 microwave probe, each
Model GSG-xxx-67 microwave probe, each
xxx = 50, 100 or 150 µm. |
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GSG Cables (Priced per probe arm) |
These cables are cryogenically stabilized before assembly. The cables also include a compression-seal vacuum feed through which is a lossless feed through. The low-loss cables have higher thermal losses but lower microwave losses. The cable is semi rigid, with stainless steel outer jacket, silver plated BeCu inner conductor and Teflon dielectric. The low-loss cable has a copper film outside the dielectric. |
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Sample Holders |
 Each Base system includes one TT-CS-G sample holder. Additional sample holders can be ordered configured as listed.
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* Manufactured with low contraction material for larger diameter samples.
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Triaxial feedthrough and coaxial cable installed and wired. (Only one required for these sample holders.) |
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System Options and Accessories |
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Power supply for above, to amplify the controller analog output and drive the 100W shield heater. Includes power cable and cable between the LakeShore controller and power supply. (Requires shield heater/thermometer option above.) |
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Pneumatic Vibration Isolator |
 Table-top vibration isolation system, pneumatically operated. (Requires a source of compressed air/gas at 40 psi to 100 psi). (Bottom view of probe shown) |
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Special Request
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| Terms
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FOB: Tucson, AZ. USA
Deliveries will be quoted on an ARO basis.
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Warranty: One year parts and labor.
All pricing and specifications are subject to change at the discretion of the seller.
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| Please submit your customized system for quotation by clicking on the button below. You will then be prompted to check your specifications and once approved, these will be emailed to our sales department for a quote. |
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