Patent ID: 7595653
Filing Date: 2009-09-29
Classification: B81B,G01L,G01N

Abstract:
1. A pressure testing apparatus for chips on a wafer, the apparatus comprising: a pressure chamber comprising a housing having an upper part and a lower part; a support plate arranged between the upper and lower parts of the housing; a plurality of fasteners which extend through the support plate, the upper part, and the lower part, and fasten the upper part to the support plate, and the lower part to the support plate; a wafer chuck; a testing means; and a positioning device for positioning the wafer chuck and the chips relative to the testing means, wherein the wafer chuck, the testing means and the positioning device are supported to the support plate and arranged inside the pressure chamber, and wherein portions of the support plate define an opening inside the pressure chamber which provides a gas connection between the upper and lower parts of the housing.