Optical sensing device and method for manufacturing an optical sensing device
US10976200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2018 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Aug 30, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/107
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensing device comprises a photodetector array comprising at least one first photodetector and at least one second photodetector, the photodetector array being arranged on a semiconductor substrate. The optical sensing device further comprises a filter stack arranged on the substrate and covering the photodetector array. The filter stack comprises at least two first lower dielectric mirrors and at least two second lower dielectric mirrors, where a first and a second lower mirror are arranged above the first photodetector and a first and a second lower mirror are arranged above the second photodetector, and where the first lower mirrors have a different thickness in vertical direction which is perpendicular to the main plane of extension of the substrate than the second lower mirrors. The filter stack further comprises a spacer stack arranged on the first and second lower mirrors, and an upper dielectric mirror arranged on the spacer stack and covering the photodetector array. Furthermore, a method for manufacturing an optical sensing device is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.