Patent ID: 9340414
Filing Date: 2016-05-17
CPC Classification: B81B,B81C,G01L

Claim Text:
1. A method of fabricating an integrated pressure sensing device, the method comprising: providing a substrate member having a surface region; forming a CMOS IC layer overlying the surface region, the CMOS IC layer having a CMOS surface region; forming an oxide layer overlying the CMOS surface region, the oxide layer having an oxide surface region; removing at least a portion of the oxide layer to form at least a first cavity region; bonding a single crystalline silicon wafer overlying the oxide surface region to seal the first cavity region; thinning the single crystalline silicon wafer to a desired thickness; removing at least a portion of the single crystalline silicon wafer to form at least one connection path; depositing a metal material within the at least one connection path to form at least one via structure; and removing at least a second portion of the single crystalline silicon wafer to expose a cavity path coupled to the first cavity region, the removed second portion of the single crystalline silicon being outside the sealed first cavity region.