• 5.5 kOe (0.55 T) horizontal (in plane) field electromagnet
• High stability operation from 10 K to 450 K
• Active cryogenic control of the cold head andradiation shield
• Measurements from DC to 67 GHz
• Accommodates up to 25 mm (1 in) diameter wafers
• Configurable with up to four micro- manipulatedprobe arms
• Probe arms with 3-axis adjustments and ±5°theta planarization
• 360° sample stage rotation option
• Cables, shields, and guards minimize electrical noise and thermal radiation losses
• High resolution optical system
• Non-magnetic vibration isolation table
• Options and accessories for customization to specificresearch needs

 Description

The Model EMTTP4 is a versatile cryogenic electromagnet based micro-manipulated probe station used for nondestructive testing of devices on full and partial wafers up to 25 mm (1 in) in diameter. The EMTTP4 is a platform for measurement of magneto-transport, electrical, electrooptical, parametric, high Z, DC, RF, and microwave properties of materials and test devices. Nanoscale electronics, quantum wires and dots, semiconductors,
superconductors, and spintronic devices are typical materials measured in an EMTTP4. A wide selection of probes, cables, sample holders, and options makes it possible to configure the EMTTP4 to meet your specific measurement applications.

The EMTTP4 is equipped with a 5.5 kOe (0.55 T) horizontal (in-plane) field electromagnet mounted on a vibration isolation table. The EMTTP4 operates over a temperature range of 10 K to 450 K. The probe station provides efficient temperature operation and control with a continuous refrigeration system using either helium or nitrogen. Field dependent measurements at ambient temperature are possible without the use of cryogens. Liquid helium is only required for cooling the device under test (DUT) to below 80 K. Vapor-cooled shielding optimizes efficiency and intercepts blackbody radiation before it reaches the sample. A 100 W cartridge heater on the cold head minimizes temperature gradients across the sample and, along with independent control of radiation shield heaters, provides the probe station with fast thermal response.

  

For increased versatility, EMTTP4 options include 360° sample stage rotation, a LN₂ Dewar kit, higher magnification monoscopes, vacuum turbo pumping system, pump-line vibration isolator,recirculating chillers, and probe arm fiber optic cable.