Pressure sensor in the form of a film

Details Pressure sensor in the form of a film Pressure sensor in the form of a film

2008-03-18

2008-03-18

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S719000, C073S753000

Reexamination Certificate

active

07343807

ABSTRACT:
The invention relates to a pressure sensor in the form of a film, comprising a first carrier film and a second carrier film which are arranged at a certain distance from each other by means of a spacer. The distance holder comprises at least one recess which defines an active region of the pressure sensor wherein both of the carrier films are arranged opposite each other, also comprising a first electrode and a second electrode and a layer made of pressure-sensitive material. The first electrode, the second electrode and the layer made of pressure-sensitive material are disposed in the active region on the first and/or second carrier film such that when the carrier films are pressed together through the pressure sensitive layer, electric contact is produced between the first and the second electrode. According to the invention, the pressure sensor comprises at least one third electrode which is disposed in the active region of the pressure sensor on the first and second carrier film such that when the carrier films are pressed together though the pressure sensitive layer, electric contact is produced between the third electrode and the first electrode and/or between the third electrode and the second electrode.

REFERENCES:
patent: 4794366 (1988-12-01), Sakamoto
patent: 5948990 (1999-09-01), Hashida
patent: 6109117 (2000-08-01), Stanley
patent: 34 46 327 (1986-06-01), None
patent: 0 891 898 (1999-01-01), None
patent: 1 106 977 (2001-06-01), None
patent: WO 99/39168 (1999-08-01), None
International Search Report; PCT/EP2004/051179; Nov. 25, 2004.

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