Cascade PLC50 Cryogenic Probe Station With Up to Six Positioners Published May 25, 2021 at 640 × 375 in FormFactor PLC50 ← Previous Next → The PLC50 is a highly-precise, cost-effective probe system for wafers and substrates up to 100 mm in a high vacuum environment, at cryogenic temperatures down to 77 K with liquid nitrogen or < 7 K with liquid helium.