Advanced Photonix, Inc.

Harold S Melkonian

Roger W Forrest

A semiconductor photodiode is configured to have its rear face light responsive with electrical contacts formed on the front face. The photodiode can be surface mounted, such as by solder, upon a carrier with the light responsive rear face up. An integral filter over the rear face confines light reaching the semiconductor substrate to desired wavelengths. In one embodiment, the photodiode also includes integral opaque layers over the front and rear faces of the substrate. The rear opaque layer includes an aperture to allow light to strike the rear face adjacent an active region. In another embodiment, the photodiode is configured for double-sided light sensitivity, and the front side faces an aperture through the carrier.

Solid state photodetector with light-responsive rear face

A solid state photodiode is configured to have its rear face light responsive and is electrically connected to a lead frame or flexible carrier with conductor traces, which includes an aperture to allow light to impact the rear face. A photodiode with light responsive front and rear faces, with or without filters, permits various applications to be implemented relatively inexpensively when compared to prior art systems.

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Ventura, CA, United States of America

Harold S Melkonian