Patent ID: 6768331
Filing Date: 2004-07-27
Classification: G01R

Abstract:
A contact housing adapted for receiving a plurality of compliant contacts, the contact housing for use to engage a wafer-under-test, the wafer-under-test having a wafer coefficient of thermal expansion and including an array of conductive contact pads disposed in a wafer-level-packaged pattern, the contact housing including:a first plate formed with a first pattern of apertures, the first pattern of apertures corresponding to at least a portion of the wafer-level-packaged pattern, the first plate consisting only of a material having a coefficient of thermal expansion matching the wafer coefficient of thermal expansion; and a second plate formed with a second pattern of apertures, the second pattern of apertures disposed in a spaced-apart relationship for registering vertically with the first pattern of apertures, the first and second plates cooperating to define a plurality of contact receptacles for nesting the compliant contacts.