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

Claim 17:
18. A semiconductor light-receiving element manufacturing method of manufacturing a semiconductor light-receiving element which comprises a semiconductor substrate, a multiplication layer, an electric-field control layer, a light absorption layer and a window layer, and in which a p-type region is formed in the window layer, said p-type region having 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,
said semiconductor light-receiving element manufacturing method comprising:
a step of stacking the multiplication layer, the electric-field control layer, the light absorption layer and the window layer, sequentially on the semiconductor substrate, to thereby form a layered body;
a second p-type portion formation step of forming the second p-type portion of the p-type region; and
a first p-type portion formation step of forming, after the second p-type portion formation step, the first p-type portion of the p-type region.