Patent ID: 11862747
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor light-receiving element in which a multiplication layer, an electric-field control layer, a light absorption layer and a window layer are sequentially formed on a semiconductor substrate, and a p-type region is formed in the window layer,
wherein the p-type region has a first p-type portion and a second p-type portion whose current multiplication factor due to light incidence is larger than that of the first p-type portion;
wherein the first p-type portion is formed as a central portion of the p-type region, said central portion including a central axis perpendicular to the semiconductor substrate; and
wherein the second p-type portion is formed on an outer periphery of the central portion in a radial direction about the central axis.