Electronic Devices Having Compact Optical Modules

Organization Name

Inventor(s)

Seshasayee Gaddamraja of Santa Clara CA (US)

Electronic Devices Having Compact Optical Modules

This abstract first appeared for US patent application 20250072134 titled 'Electronic Devices Having Compact Optical Modules

Original Abstract Submitted

ambient light sensor modules may be formed using a wafer-level process in which a filter and a diffuser are stacked on a silicon substrate or a combination substrate that includes multiple photosensors. the stack may be diced, filled with opaque material, and diced again to form multiple ambient light sensor modules. the resulting modules may include a silicon substrate with a photosensor and through-silicon vias, a filter on the silicon substrate, and a diffuser coupled to the filter. there may be an air gap between a portion of the diffuser and the photosensor. the air gap may be formed from a recess in the diffuser or from spacers between the filter and the diffuser. alternatively, the diffuser may be applied as a coating on the filter. by forming the ambient light sensor modules at the wafer level, the modules may have smaller footprints and/or volumes.