Patent ID: 6972069
Filing Date: 2005-12-06
Classification: H01L

Abstract:
1. A method for connecting a product wafer and a carrier wafer in a planar manner, which comprises: attaching a double-sided adhesive film or an adhesive layer onto the carrier wafer; placing the carrier wafer between positioning pins on a chuck of a vacuum chamber; placing the product wafer between guiding pins of a vacuum-holding device of a vacuum-chamber cover and fixing the product wafer by opening a first vacuum valve connecting the vacuum-holding device to an evacuating device; closing the vacuum chamber and evacuating the vacuum chamber to an equal or higher vacuum than a vacuum of the vacuum-holding device by opening a second vacuum valve; and after closing at least the first vacuum valve and the second vacuum valve and opening air-admitting orifices, admitting air into the vacuum chamber such that the carrier wafer and the product wafer are simultaneously pressed onto each other in a planar manner by rising pressure in the vacuum chamber.