Optical Receiver
AssigneeNippon Telegraph and Telephone Corporation
InventorsYuki Yamada, Masahiro Nada, Shoko Tatsumi, Hideaki Matsuzaki
Life of this patent
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Abstract
A light-receiving device includes a light-receiving element formed on a main surface of a substrate, a light incidence surface formed on a side portion of the substrate at an acute angle or an obtuse angle with respect to the plane of the substrate and having an inclined surface forming one plane, and a lens for focusing light incident on the light-receiving element. The lens is disposed at a position where the light incident from the light incidence surface is reflected on a side of a back surface of the substrate.
Claims18
1-8. (canceled)
A light-receiving device comprising:
- a light-receiving element on a main surface of a substrate, the light-receiving element including a back surface incidence photodiode including:
- a first semiconductor layer on the substrate and composed of a first conductivity type semiconductor;
- a light-absorbing layer on the first semiconductor layer and composed of a semiconductor;
- a second semiconductor layer on the light-absorbing layer and composed of a second conductivity type semiconductor;
- a first electrode connected to the second semiconductor layer;
- and
- a second electrode connected to the first semiconductor layer;
- a light incidence surface on a side portion of the substrate at an acute angle or an obtuse angle with respect to a plane of the substrate and having an inclined surface forming one plane;
- and
- a lens configured to focus light incident on the light-receiving element, wherein light incident from the light incidence surface is reflected on a back surface side of the substrate and is incident on the light-receiving element obliquely with respect to a plane of the light-absorbing layer.
A light-receiving device comprising:
- a light-receiving element on a main surface of a substrate, the light-receiving element including a back surface incidence photodiode, the back surface incidence photodiode comprises a light-absorbing layer composed of a semiconductor;
- a light incidence surface on a side portion of the substrate at an acute angle or an obtuse angle with respect to a plane of the substrate and having an inclined surface forming one plane;
- and
- a lens configured to focus light incident on the light-receiving element, wherein light incident from the light incidence surface is reflected on a back surface side of the substrate and is incident on the light-receiving element obliquely with respect to a plane of the light-absorbing layer.
Dependencies are inferred from the claim text.