Patent ID: 11916161
Assignee: LUMENTUM JAPAN, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. The semiconductor light-receiving element of claim 1, wherein:
the high-concentration layer of the first conductivity type is a contact layer of the first conductivity type,
the low-concentration layer of the first conductivity type is a low-concentration wide band gap layer of the first conductivity type with a band gap that does not absorb incident light,
the high-concentration layer of the second conductivity type is a contact layer of the second conductivity type and is a first high-concentration layer of the second conductivity type,
one of the low-concentration layer of the first conductivity type or the low-concentration layer of the second conductivity type includes an absorption layer with a band gap that absorbs incident light,
wherein the one is the low-concentration layer of the second conductivity type; and

the semiconductor light-receiving element further comprises:
a second high-concentration layer of the second conductivity type formed on the first high-concentration layer of the second conductivity type and in contact with the first high-concentration layer of the second conductivity type.