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Photo-detecting apparatus

An optical detection device and optical signal technology, applied in radiation control devices, photovoltaic power generation, semiconductor devices, etc., can solve problems such as leakage current and performance degradation, and achieve the effects of low power consumption, low dark current, and high demodulation contrast.

Pending Publication Date: 2021-10-22
AUTOLOGIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when photodetectors are used in these applications in single or array configurations, leakage currents, dark currents, electrical / optical crosstalk, and power consumption can degrade performance

Method used

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Examples

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Embodiment Construction

[0028] Figure 1A Illustrated is a cross-sectional view of a light detection device according to some embodiments. The photodetection device 100 a includes a germanium-based light-absorbing material 102 supported by a semiconductor substrate 104 . In one implementation, the semiconductor substrate 104 is made of silicon or silicon germanium or germanium or III-V compounds. The germanium-based light-absorbing material 102 refers herein to intrinsic germanium (100% germanium) or an alloy of elements including germanium, such as a silicon-germanium alloy with a Ge concentration of 1% to 99%. In some implementations, germanium-based light absorbing material 102 can be grown using blanket epitaxy, selective epitaxy, or other suitable techniques. Ge-based light absorbing material 102 is embedded in the Figure 1A In the semiconductor substrate 104 , in alternative embodiments, the germanium-based light absorbing material 102 may be partially embedded in the semiconductor substrat...

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Abstract

The invention provides a photo-detecting apparatus. The photo-detecting apparatus includes a semiconductor substrate. A first germanium-based light absorption material is supported by the semiconductor substrate and configured to absorb a first optical signal having a first wavelength greater than 800 nm. A first metal line is electrically coupled to a first region of the first germanium-based light absorption material. A second metal line is electrically coupled to a second region of the first germanium-based light absorption material. The first region is un-doped or doped with a first type of dopants. The second region is doped with a second type of dopants. The first metal line is configured to control an amount of a first type of photo-generated carriers generated inside the first germanium-based light absorption material to be collected by the second region.

Description

[0001] This application is a branch of a patent application with application number 201980015012.2 (PCT / US2019 / 019167) filed on August 24, 2020, filed on February 22, 2019, and titled "Light detection device and method thereof" case application. [0002] Cross References to Related Applications [0003] This patent application claims the benefit of: U.S. Provisional Patent Application No. 62 / 634,741, filed February 23, 2018, U.S. Provisional Patent Application No. 62 / 654,454, filed April 8, 2018, April 20, 2018 U.S. Provisional Patent Application No. 62 / 660,252, filed July 15, 2018, U.S. Provisional Patent Application No. 62 / 698,263, filed June 8, 2018, U.S. Provisional Patent Application No. 62 / 682,254, filed June 8, 2018, June 19, 2018 U.S. Provisional Patent Application No. 62 / 686,697 filed on July 8, 2018, U.S. Provisional Patent Application No. 62 / 695,060 filed on July 8, 2018, U.S. Provisional Patent Application No. 62 / 695,058 filed on July 8, 2018, October 2018 U.S. Pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/148
CPCH01L27/14806H01L27/14831H01L31/103H01L31/035272H01L31/108Y02E10/50H01L31/02024H01L31/035254H01L31/0284H01L27/15H01L31/1812H01L31/1075H01L31/0745
Inventor 陈书履陈建宇郑斯璘那允中杨闵杰刘汉鼎梁哲夫
Owner AUTOLOGIC
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