Patent ID: 6550337
Filing Date: 2003-04-22
Classification: G01L,H01L

Abstract:
A pressure sensor comprising:a pressure sensing die having a first surface and a second surface, a pressure sensitive electronic component being formed in or on said first surface; a plate having a hole therein, said second surface of said pressure sensing die being affixed to said plate such that at least a portion of said second surface is in fluid communication with said hole, liquid being provided in said hole and pressing against said portion of said second surface, wherein said pressure sensing die provides a measure of the pressure with which said liquid presses against said die, and wherein said first surface is not in a liquid environment; a reservoir containing said liquid, said reservoir being in fluid communication with said pressure sensing die through said hole in said plate; and a diaphragm extending between said reservoir and a space, said diaphragm and said liquid applying pressure in said space to said pressure sensing die.