| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem wherein, when a pressure detection device is loaded for an automobile, especially in an exhaust environment, a very strong acidic material such as exhaust condensate or various pollutant products generated by engine combustion reaches the pressure detection device. SOLUTION: A simple structure wherein a resin diaphragm excellent in waterproofness and acid resistance is mounted on an introduction port for pressure detection, and fixed by laser welding is used. Hereby, a semiconductor sensor is protected from the exhaust environment of an internal combustion engine or the like without changing a sensor characteristic such as responsiveness, and durability and reliability are improved. COPYRIGHT: (C)2009,JPO&INPIT
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