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US 9,793,424 B2Granted
Photoelectric conversion device and optical signal receiving unit having photodiode
AssigneeSamsung Electronics Co., Ltd.
InventorsKeun-yeong Cho, Ho-chul Ji
Life of this patent
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Abstract
A photoelectric conversion device includes a substrate having a first surface and a second surface that is an opposite side of the first surface, wherein one of the first and second surfaces is a light incidence surface, a photodiode (PD) formed in the first surface of the substrate, a reflective layer formed on one of the first and second surfaces of the substrate, which is the opposite side of the light incidence surface, and a microlens formed on the light incidence surface of the substrate.
Claims17
A photoelectric conversion device, comprising:
- a substrate having a first surface and a second surface that is an opposite side of the first surface, wherein the first surface is a light incidence surface;
- a photodiode (PD) formed at the first surface of the substrate, the PD including a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, and a light absorptive semiconductor layer interposed between the first and second conductivity-type semiconductor layers, the first conductivity-type semiconductor layer, the light absorptive semiconductor layer, and the second conductivity-type semiconductor layer being arranged in a vertical direction from the first surface of the substrate;
- a reflective layer formed on the second surface of the substrate;
- and
- a microlens formed on the light incidence surface of the substrate, wherein:
- a portion of the first conductivity-type semiconductor layer is positioned to receive a first portion of light from the light incident surface without said first portion of light first passing through the light absorptive semiconductor layer or the second conductivity-type semiconductor layer, and
- a portion of the second conductivity-type semiconductor layer is positioned to receive a second portion of light from the light incident surface without said second portion of light first passing through the light absorptive semiconductor layer or the first conductivity-type semiconductor layer.
4 more elements
An apparatus, comprising:
- an optical input, the optical input receiving light traveling in a first direction;
- a reflector, the light received at the optical input being directed to the reflector;
- a lens disposed in a path of the light between the optical input and the reflector such that light from the optical input that impinges on the reflector passes through the lens, the lens directing the light to the reflector, at least some of the light impinging on the lens being directed in a direction different from the first direction;
- and
- an optoelectronic element disposed in a path of the light, the optoelectronic element including a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, and a light absorptive semiconductor layer interposed between the first and second conductivity-type semiconductor layers, the first conductivity-type semiconductor layer, the light absorptive semiconductor layer, and the second conductivity-type semiconductor layer being arranged in a vertical direction from a light incidence surface of the optoelectronic element, wherein
- the first conductivity-type semiconductor layer is positioned to receive a first portion of light from the lens without said first portion of light first passing through the light absorptive semiconductor layer or the second conductivity-type semiconductor layer, and
- the second conductivity-type semiconductor layer is positioned to receive a second portion of light from the lens without said second portion of light first passing through the light absorptive semiconductor layer or the first conductivity-type semiconductor layer.
4 more elements
Dependencies are inferred from the claim text.