Patent ID: 7396740
Filing Date: 2008-07-08
Classification: B81B,B81C,G02B

Abstract:
1. A method of producing a device with a moveable portion disposed spaced apart from a support wafer, comprising: generating a first planarization layer of a first starting material on a support wafer having a structured surface using a first method to fill in the structures of the structured surface of the support water, whereby a surface of the support wafer with a first degree of planarization is obtained; generating a second planarization layer of a second starting material on the planarized surface of the support wafer using a second method to obtain a planarized surface of the support wafer with a second degree of planarization, which is higher than the first degree of planarization, wherein the first and second planarization layers can be removed together; bonding the support wafer having the planarized surface and a device wafer with a backing layer and a device layer disposed thereon such that the device layer and the planarized surface of the support wafer are bonded; removing the backing layer of the device wafer; and structuring the bonded structure and removing the first and second planarization layers via a common method to generate the moveable portion of the device.