公开(公告)号：US20040219340A1

公开(公告)日：2004-11-04

申请号：US10426148

申请日：2003-04-29

Applicant: Motorola Inc.

Inventor： Andrew C. McNeil ,  Gary Li ,  Gary J. O'Brien

IPC: B32B015/04

CPC classification number: B81B3/0078 ,  B81B2201/025 ,  G01P15/08 ,  G01P15/0802 ,  G01P15/0888 ,  G01P2015/0814 ,  Y10T428/24917

Abstract: A proof mass (11) for a MEMS device is provided herein. The proof mass comprises a base (13) comprising a semiconductor material, and at least one appendage (15) adjoined to said base by way of a stem (21). The appendage (15) comprises a metal (17) or other such material that may be disposed on a semiconductor material (19). The metal increases the total mass of the proof mass (11) as compared to a proof mass of similar dimensions made solely from semiconductor materials, without increasing the size of the proof mass. At the same time, the attachment of the appendage (15) by way of a stem (21) prevents stresses arising from CTE differentials in the appendage from being transmitted to the base, where they could contribute to temperature errors.