Pressure sensor having an insulating layer and fluid tight amorphous metal layer
First Claim
1. A pressure or differential sensor comprising:
- a membrane comprising at least one measuring element located thereon;
evaluation electronics for measuring a membrane deflection;
a protection layer;
a mounting which grips the membrane in a pressure-tight manner;
said protection layer comprising an electrically insulating layer deposited directly onto said evaluation electronics and said membrane; and
a fluid tight amorphous metal layer deposited on said electrically insulating layer.
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Accused Products
Abstract
The invention relates to a pressure or differential pressure sensor comprising a membrane with at least one measuring element located thereon, as well evaluation electronics for measuring the membrane deflection. The membrane is covered against environmental influences with a protective layer and is gripped within a mounting in a pressure tight manner. The protective layer is composed of a fluid tight amorphous metal layer, a so called metal glass layer which with the interposing of an electrically insulating layer, is directly deposited onto the membrane, the measuring element located thereon and where appropriate, onto further electronic components located thereon. In this manner, on the one hand, the membrane is protected but on the other hand it may be deflected sensitively since the amorphous metal layer is fluid and gas tight even with layer thicknesses in the μm region.
54 Citations
14 Claims
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1. A pressure or differential sensor comprising:
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a membrane comprising at least one measuring element located thereon; evaluation electronics for measuring a membrane deflection; a protection layer; a mounting which grips the membrane in a pressure-tight manner; said protection layer comprising an electrically insulating layer deposited directly onto said evaluation electronics and said membrane; and a fluid tight amorphous metal layer deposited on said electrically insulating layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification