Patent ID: 7043995

Claim:
A pressure sensor, comprising: a support; a membrane having first and second opposing sides and a radially peripheral edge region, said membrane being made of an electrical conducting metal, said radially peripheral edge region being fixed relative to said support, and one of said first and second opposing sides being arranged for facing a medium such that the membrane is deflective relative to the pressure of the medium; an insulating layer having a first side and a second side, wherein said first side of said insulating layer is arranged on said membrane; and measuring elements and an electric circuit interconnecting said measuring elements being applied on said second side of said insulating layer by a thick-film technique and sintered onto said second side by a thermal process, said measuring elements and said electric circuit being arranged for determining the pressure of the medium, said insulating layer consisting of a material having a coefficient of expansion that lies between the coefficient of expansion of said metal of said membrane and the coefficient of expansion of said measuring elements and said electric circuit.