Patent ID: 9656857
Date: 2017-05-23
CPC Classifications: B81B,B81C

Claim:
1. A semiconductor device, comprising: a device substrate comprising first and second micro-electro mechanical system (MEMS) devices; a capping structure bonded to the device substrate, the capping structure comprising a first cavity arranged over the first MEMS device and a second cavity arranged over the second MEMS device, wherein the first cavity is at a first gas pressure, and wherein the second cavity is at a second gas pressure, which is different from the first gas pressure; a recess arranged within a lower surface of the capping structure, which abuts the second cavity and which extends from the lower surface of the capping structure to a top surface of the recess which is vertically spaced between the lower surface and an upper surface of the capping structure; a vent arranged between vent sidewalls of the capping structure, wherein the vent sidewalls are coupled to the top surface of the recess, wherein the vent extends to the upper surface of the capping structure, and wherein the vent is narrower than the recess; and a lid arranged within the vent and configured to seal the second cavity.