Patent ID: 7985659
Filing Date: 2011-07-26
Classification: B81B,B81C,G01P

Abstract:
1. A method for forming a semiconductor device, the method comprising: providing a first cap wafer having a first opening extending through the first cap wafer, and a second cap wafer bonded to the first cap wafer, wherein the second cap wafer has a second opening extending through the second cap wafer, wherein the first opening is misaligned with respect to the second opening; after the providing the first cap wafer and the second cap wafer bonded to the first cap wafer, bonding the second cap wafer to a device wafer, wherein a cavity is formed between the device wafer and the second cap wafer, and wherein the device wafer comprises at least one semiconductor device exposed to the cavity; and after the bonding the second cap wafer to the device wafer, applying a vacuum to the first cap wafer, the second cap wafer, and the device wafer, wherein during the applying the vacuum, the method further comprising: