Patent ID: 7765866
Filing Date: 2010-08-03
Classification: G01L,H01L

Abstract:
1. A pressure sensor comprising: a sensing element including a sensor chip, wherein the sensor chip has a diaphragm; a case having a space, wherein the sensing element is disposed in the space, wherein the case has a pressure introduction passage having an open end on an exterior surface of the case, wherein the pressure introduction passage is in communication with the space to introduce a pressure medium into the sensing element; a line element having a first portion exposed to the space and a second portion exposed to an outside of the case, wherein the first portion is electrically connected with the sensing element, wherein the second portion is capable of providing an electrical connection between the sensing element and an external element, wherein the sensing element outputs a detection signal to the line element, wherein the detection signal depends on a pressure of the pressure medium applied to the diaphragm; and an insect entering restriction element extending across a path on the exterior surface of the case, the path interconnecting between the second portion of the line element and the open end of the pressure introduction passage, wherein: the case includes a first case portion and a second case portion; the first case portion forms the space having an open end and a closed end; the second case portion is fixed to the first case portion at a part of a surface of the first case portion, the part of the surface surrounding the open end of the space; the second case portion forms the pressure introduction passage; the second case portion includes a projection part projecting in a direction away from the first case portion; and the insect entering restriction element is disposed on the projection part.