Patent ID: 6383834
Filing Date: 2002-05-07
Classification: H01L

Abstract:
A charge coupled device comprising:a substrate; at least two photodiodes formed in the substrate; a first insulating layer formed on the substrate; a first transfer gate formed on a portion of the first insulating layer between the photodiodes; a second insulating layer covering the first transfer gate, and having a projecting portion projecting vertically from the first transfer gate with respect to a horizontal alignment of the first transfer gate; second and third transfer gates disposed horizontally over respective sides of the vertically projecting portion of the second insulating layer and the first transfer gate, the second and third transfer gates having a gap therebetween over the vertically projecting portion; a third insulating layer covering the second and third transfer gates; and a fourth transfer gate formed over a portion of the second and third transfer gates and over the projecting portion of the second insulating layer.