Solid state photodetector with light-responsive rear face
AssigneeAdvanced Photonix, Inc.
InventorsRoger W. Forrest, Harold S. Melkonian
Life of this patent
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Abstract
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.
Claims8
A semiconductor photodiode, said photodiode comprising a substrate including a body region of a first conductivity type, said body region having a surface region of a second conductivity type, adjacent a front face of the photodiode and defining a PN junction with said body region, said photodiode including a doped surface region adjacent a rear face of said photodiode, said photodiode also including a doped frame region at said front surface encompassing but spaced apart from said surface region, said photodiode including first and second electrodes on said front face in contact with said first and second doped region respectively, said photodiode being mounted with said rear face abutting a lead frame, said lead frame having therein an aperture aligned with said rear face for permitting light to reach said rear face through said aperture, said first and second electrodes being connected to said lead frame via wire bonds.
Dependencies are inferred from the claim text.