Patent ID: 9227842
Filing Date: 2016-01-05
CPC Classification: B81B,B81C,H01L

Claim Text:
1. A method for fabricating a MEMS device comprising: forming a silicon-on-insulator (SOI) wafer, the SOI wafer comprising a handle layer, a device layer and oxide formed between the handle layer and the device layer; depositing an oxide layer on the SOI wafer and patterning the deposited oxide layer; depositing polysilicon on the patterned oxide layer; depositing a conductive layer on the polysilicon; after depositing the conductive layer on top of the polysilicon, patterning and etching the polysilicon and the conductive layer; further etching the device layer; removing the patterned oxide layer thereby forming a MEMS substrate; bonding the MEMS substrate to the CMOS wafer, the CMOS wafer having at least one metal layer; forming an electrical connection between the MEMS substrate and the at least one metal layer; thinning the handle layer; patterning the handle layer; partially removing the oxide layer deposited between the handle layer and the device layer.