Patent ID: 8969811
Filing Date: 2015-03-03
Classification: G01J,H01L,Y10T

Abstract:
1. A device to detect thermal radiation, comprising: a membrane formed of electrically and thermally insulating material; a substrate supporting the membrane; at least two detector elements situated next to each other on said membrane, each of said at least two detector elements comprising a pyroelectrically sensitive material between two electrode layers and configured to transduce thermal radiation into an electrical signal; at least one heat sink formed as a heat dissipation path extending between said detector elements and located at a side of said membrane, said side of said membrane being selected from the group consisting of: (a) a side of said membrane facing toward said detector elements and (b) a side of said membrane facing away from said detector elements; said heat dissipation path having a higher heat conductivity than said membrane and being in thermal conducting connection via said membrane with the at least two detector elements to discharge heat via the heat dissipation path from said detector elements; and at least two heat barriers integrated into said membrane, said heat barriers having a lower heat conductivity than said membrane, extending between said detector elements and said heat dissipation path outside an area on said membrane on which said at least two detector elements are situated, and bracketing said heat dissipation path, to prevent heat conduction in said membrane both between said detector elements and between said detector elements and said heat dissipation path, thereby lowering crosstalk between said detector elements, wherein said heat barriers are formed by an evacuated recess extending fully through both said membrane and said substrate.