Patent ID: 9573806
Date: 2017-02-21
CPC Classifications: B81B,B81C,H01L

Claim:
1. A method for forming an integrated circuit device, the method comprising: forming a dielectric layer over a substrate, the substrate comprising circuitry to interact with a Micro Electro-Mechanical System (MEMS) device; forming a sacrificial material into a sacrificial cavity formed into the dielectric layer; forming a membrane layer over the dielectric layer and sacrificial material; removing the sacrificial material through at least one via formed through the membrane layer; forming a dielectric capping structure on the membrane layer such that a second cavity is formed, the second cavity being connected to the sacrificial cavity through the at least one via formed into the membrane layer, wherein forming the dielectric capping structure comprises bonding a capping dielectric layer on a surface of a capping substrate to the membrane layer; and after the bonding, removing the capping substrate material.