Patent ID: 8350215

Claim:
A thermopile sensor for detection of infrared radiation in a measurement wavelength range, comprising: a sensor substrate in which a cavity is formed; a diaphragm formed on the sensor substrate above the cavity; and at least one thermopile structure which is formed in, on or below the diaphragm and has at least one thermopile pair of two mutually contacted thermopile legs, the two thermopile legs being formed from doped semiconductor materials having different Seebeck coefficients, at least one insulating intermediate layer between the thermopile legs, a layer system formed above the cavity, said layer system includes said at least two thermopile legs, said at least one insulating intermediate layer, and an upper insulation layer formed above said at least two thermopile legs, said layer system forms a multibeam interference for IR radiation in the measurement wavelength range with absorption of part of the IR radiation and at least partial reduction in reflection, wherein the layer system also includes at least two additional auxiliary layers, which are formed above the upper insulation layer, wherein the at least two additional auxiliary layers have different layer thicknesses.