The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 2024
Filed:
Jun. 13, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sundararajan Balasekaran, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A light detection device includes a sensor array and a readout circuit. The sensor array includes a compound semiconductor substrate having a first main surface and a second main surface opposite to the first main surface, a plurality of photodetectors arranged two-dimensionally on the first main surface, and an insulating film disposed on the second main surface. The readout circuit includes a silicon substrate having a third main surface connected to the first main surface of the compound semiconductor substrate. The insulating film contains an insulating material having a lower thermal expansion coefficient than a compound semiconductor contained in the compound semiconductor substrate. The insulating film includes at least one first portion having a first thickness and a second portion having a second thickness larger than the first thickness.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile