Patent ID: 6593165
Filing Date: 2003-07-15
Classification: H01L

Abstract:
A method for fabricating a circuit-incorporating light receiving device comprising an integrated circuit and a photodiode, wherein the integrated circuit and the photodiode are provided on a single semiconductor substrate;the integrated circuit comprises a transistor having a polycrystalline silicon as an emitter diffusion source and an electrode; elements included in the photodiode are isolated from each other using local oxidization; the semiconductor substrate comprises a semiconductor substrate of a first conductivity type; the photodiode comprises a first semiconductor layer of a second conductivity type provided on the semiconductor substrate of the first conductivity type and a semiconductor layer of the first conductivity type splitting the first semiconductor layer of the second conductivity type into a plurality of semiconductor layers of the second conductivity type; and the photodiode comprises a plurality of split photodiodes for detecting a light signal using the first semiconductor layer of the second conductivity type and the semiconductor substrate of the first conductivity type, the method comprising the processes of: (a) isolating the elements included in the photodiode by the local oxidization; and (b) forming the transistor using the polycrystalline silicon.