An improved vertical pin probing device is constructed with a housing with spaced upper and lower spacers of Invar, each having a thin sheet of silicon nitride ceramic material held in a window in the spacer by adhesive. The Invar spacers may be composed of Invar foils adhered to one another in a laminated...http://www.google.es/patents/US6566898?utm_source=gb-gplus-sharePatente US6566898 - Temperature compensated vertical pin probing device
Temperature compensated vertical pin probing device
