Patent ID: 7813028

Claim:
A method of manufacturing a MEMS structure from SOI wafers, each SOI wafer having front and back substrate layers separated by an insulation layer, the method comprising the following steps: (a) processing a first surface of the front substrate layer of a first SOI wafer; (b) processing a first surface of the front substrate layer of a second SOI wafer; (c) bonding the processed first surface of the front substrate layer of the first SOI wafer to the processed first surface of the front substrate layer of the second SOI wafer; (d) removing the back substrate layer and the insulation layer from the second SOI wafer to expose a second surface of the front substrate layer of the second SOI wafer; (e) processing the exposed second surface of the front substrate layer of the second SOI wafer; (f) processing a first surface of a carrier wafer; (g) bonding the processed second surface of the front substrate layer of the second SOI wafer to the processed first surface of the carrier wafer; (h) removing the back substrate layer and the insulation layer from the first SOI wafer to expose a second surface of the front substrate layer of the first SOI wafer; and (i) processing the exposed second surface of the front substrate layer of the first SOI wafer.