Patent ID: 6955089
Filing Date: 2005-10-18
Classification: G01L

Abstract:
1. A pressure sensor comprising: a casing having a pressure detection chamber; a diaphragm for receiving pressure of a measuring object and disposed on the casing; and a pressure detection element for detecting the pressure, wherein the pressure detection chamber is filled with liquid, and the diaphragm contacts the liquid, wherein the pressure detection element is disposed in the pressure detection chamber to receive the pressure of the liquid, wherein the diaphragm has a plate shape with a radius of R and includes a circumference and a center of the plate, the circumference being fixed to the casing, wherein the diaphragm further includes a corrugate disposed concentrically with the center of the diaphragm and having a half circular cross-section and a top of the half circle, and wherein the top of the corrugate is disposed within a distance of 0.6 R from the center of the diaphragm.