Patent ID: 8975904
Filing Date: 2015-03-10
Classification: G01R

Abstract:
1. A wafer inspection interface for electrically connecting a tester and a wafer to inspect electrical characteristics of the wafer, comprising: a probe card having a plurality of probes electrically in contact with a plurality of electrodes of the wafer; an adsorption unit configured to adsorb the wafer to the probe card; an annular wafer adsorption sealing member with which an outer circumferential portion of the wafer adsorbed to the probe card by the adsorption unit comes in contact to form a hermetically closed space, the hermetically closed space being formed by the wafer, the annular wafer adsorption sealing member and the probe card when the outer circumferential portion of the wafer is in contact with an inner circumferential portion of the annular wafer adsorption sealing member; and a fixing ring configured to fix the wafer adsorption sealing member to a card holder of the probe card, wherein the adsorption unit includes an air exhaustion unit, a first air duct installed and extending radially in a probe card main body such that one end portion of the first air duct is opened in the hermetically closed space and the other end portion of the first air duct is opened at a side of the fixing ring, a second air duct installed and extending radially in the fixing ring such that one end portion of the second air duct is opened to face an opening of the other end portion of the first air duct and the other end portion of the second air duct is opened to be connected with the air exhaustion unit, and a hole formed on the wafer adsorption sealing member such that the opening of the other end portion of the first air duct is in communication with the opening of one end portion of the second air duct via the hole.