Patent ID: 6559488
Filing Date: 2003-05-06
Classification: H01L

Abstract:
An integrated circuit device formed on a single semiconductor chip, comprising:a substrate; an epitaxial layer formed on the substrate, said epitaxial layer including isolated active areas therein beneath an upper surface of the epitaxial layer; at least one transistor supported by the substrate, said transistor having regions formed in a first active area of the epitaxial layer and contacts formed thereabove in contact with the transistor regions at the upper surface of the epitaxial layer; and a photodetector supported by the substrate laterally spaced from said transistor, said photodetector having a PN junction formed in a second active area of the epitaxial layer and a light-transmissive layer formed above the upper surface of the epitaxial layer over the PN junction, said light-transmissive layer including an anti-reflective silicon nitride film, said light-transmissive layer extending laterally to regions of the chip removed from the photodetector and forming part of an insulating layer lying over said transistor, wherein the transistor contacts extend through the insulating layer to contact the transistor regions at the upper surface of the epitaxial layer.