Light sensor having transparent substrate and through-substrate vias and a contiguous IR suppression filter

摘要

Techniques are described to furnish an IR suppression filter that is formed on a glass substrate to a light sensor. In one or more implementations, a light sensor includes a substrate having a surface. One or more photodetectors are formed in the substrate and configured to detect light and provide a signal in response thereto. An IR suppression filter configured to block infrared light from reaching the surface is formed on a glass substrate. The light sensor also includes a plurality of color pass filters disposed over the surface. The color pass filters are configured to filter visible light to pass light in a limited spectrum of wavelengths to the one or more photodetectors. A buffer layer is disposed over the surface and configured to encapsulate the plurality of color pass filters and adhesion layer. The light sensor further includes through-silicon vias to provide electrical interconnections between different conductive layers.

主权项

1. A light sensor comprising:
a substrate having a surface; one or more photodetectors formed in the substrate, the one or more photodetectors configured to detect light and provide a signal in response thereto; one or more color pass filters formed proximate to an IR suppression filter and configured to filter visible light to pass light in a limited spectrum of wavelengths to the one or more photodetectors; the IR suppression filter positioned over the surface and configured to filter infrared light to at least substantially block infrared light from reaching the one or more photodetectors; a transparent substrate positioned over the IR suppression filter; and a through-substrate via formed in the substrate and configured to provide an electrical interconnect with the one or more photodetectors, wherein the IR suppression filter comprises a contiguous IR suppression filter disposed continuously over the plurality of color pass filters and the plurality of photodetectors.