Patent ID: 7992441
Filing Date: 2011-08-09
Classification: G01L,H01L

Abstract:
1. A pressure sensor module for use in a pressure sensor, the pressure sensor module comprising: a sensing element mounted on a front side of a support member; the support member comprising a hole through the support member from the front side to a back side and the sensing element covering the hole at the front side; a back side barrier at the back side of the support member, surrounding a surface of the back side of the support member and forming an enclosed area, wherein the enclosed area and the hole form a pressure channel; and, a back side protective member filling the hole and at least partially the enclosed area; wherein edge conditions of the through hole have been improved by a method comprising the steps of: Increasing the temperature of the support at a selected rate from ambient temperature of approximately 25 deg C. to approximately 1300 deg C.+/−100 deg C., maintaining the temperature at approximately 1300 deg C. for approximately one hour, and degreasing the temperature of the ceramic member at a selected rate to ambient temperature.