Patent ID: 7361284
Filing Date: 2008-04-22
Classification: B81C,H01L

Abstract:
1. A method for wafer-level package, comprising: providing a cap wafer; forming a plurality of cavities in a first surface of the cap wafer; bonding the first surface of the cap wafer to a support wafer; etching through a portion of the cap wafer surrounding the cavities from a second surface of the cap wafer; removing the cap wafer from the support wafer, and bonding the first surface of the cap wafer to a transparent wafer; removing a portion of the cap wafer corresponding to the cavities from the second surface of the cap wafer so that the remaining cap wafer form a plurality of support blocks; providing a device wafer comprising a plurality of devices and a plurality of contact pads; and bonding the support blocks to the device wafer so that the support blocks and the transparent wafer hermitically seal the devices.