LIGHT SENSOR HAVING TRANSPARENT SUBSTRATE AND DIFFUSER FORMED THEREIN

摘要

A light sensor is described that includes a glass substrate having a diffuser formed therein and at least one color filter integrated on-chip (i.e., integrated on the die of the light sensor). In one or more implementations, the light sensor comprises a semiconductor device (e.g., a die) that includes a semiconductor substrate. At least one photodetector (e.g., photodiode, phototransistor, etc.) is formed in the substrate proximate to the surface of the substrate. The color filter is configured to filter light received by the light sensor to pass light in a limited spectrum of wavelengths (e.g., light having wavelengths between a first wavelength and a second wavelength) to the photodetector. A glass substrate is positioned over the substrate and includes a diffuser. The diffuser is configured to diffuse light incident on the diffuser and to pass the diffused light to the at least one color filter for further filtering.

主权项

1. A light sensor comprising:
a substrate having a surface; a photodetector formed in the substrate proximate to the surface, the photodetector configured to detect light and to provide a signal in response thereto; a first color filter disposed over the photodetector and configured to filter light in a first limited spectrum of wavelengths to the photodetector; a second color filter disposed over the photodetector and configured to filter light in a second limited spectrum of wavelengths to the photodetector; a third color filter disposed over the photodetector and configured to filter light in a third limited spectrum of wavelengths to the photodetector; and a transparent substrate disposed over the substrate, the transparent substrate including a diffuser configured to diffuse light incident on the diffuser and to pass the diffused light to at least one of the first color filter, the second color filter, or the third color filter.