Patent ID: 8344466
Filing Date: 2013-01-01
Classification: B81B,B81C

Abstract:
1. A process for manufacturing a MEMS device, the process comprising; forming an insulating layer on a substrate of semiconductor material; after forming the insulating layer, forming a bottom region of a first material; forming a sacrificial layer over the bottom region, the sacrificial layer being of a material that is different from the first material; forming a sacrificial region, wherein forming the sacrificial region comprises selectively removing part of the insulating layer and part of the sacrificial layer in at least one contact area; growing a membrane region of semiconductor material on the sacrificial region, wherein growing the membrane region comprises forming a contact region on the bottom region and a contact portion on top of the contact region and alongside the membrane region; forming a plurality of apertures in the membrane region by selectively etching the membrane region as far as the sacrificial region, each aperture having a side wall delimited by the membrane region and a bottom delimited by the sacrificial region; completely and conformally coating the side wall and the bottom of the apertures with a porous material layer; forming a cavity by selectively removing at least one portion of the sacrificial region through the porous material layer; and filling the apertures with filling material.