Patent ID: 8357933

Claim:
A test apparatus comprising: a first wiring substrate in which a first wiring is formed; a first sheet held at the first wiring substrate and having a plurality of contact terminals for making contact with first electrodes of a semiconductor device and a second wiring electrically connecting with the contact terminals, the second wiring electrically connecting with the first wiring, tips of the contact terminals facing a main surface of the semiconductor device; an adhesion ring spacing out and holding a first region in which the contact terminals are formed in the first sheet from the first wiring substrate; an extrusion mechanism extruding the first region in the first sheet from a back surface side; a plunger mechanism traveling thrust pushes to the extrusion mechanism so as to extend the first sheet; and a pressurizing mechanism controlling an amount of contact pressurization of the contact terminals on the first electrodes by acting on the extrusion mechanism at a time of contacting the tips of the contact terminals to the first electrodes, wherein a lower surface of the adhesion ring contacts with the thin films sheet, wherein the extrusion mechanism, the adhesion ring, and the plunger mechanism constitute one by fixation, wherein the pressurizing mechanism is disposed over the adhesion ring such that the thrust transmitted to the thin films sheet is control by the strength of the pressurizing mechanism; and wherein the tips of the contact terminals are used to contact the first electrodes in electric test of the semiconductor device; wherein an extrusion amount of the first region by the extrusion mechanism and the amount of contact pressurization by the pressurizing mechanism are controlled independently, respectively.