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:
Jun. 25, 2024
Filed:
Apr. 11, 2019
Hamamatsu Photonics K.k., Hamamatsu, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Abstract
A semiconductor substrate includes a first main surface and a second main surface opposing each other. The semiconductor substrate includes a first semiconductor region of a first conductivity type, and a plurality of second semiconductor regions constituting pn junctions with the first semiconductor region. The semiconductor substrate includes the plurality of second semiconductor in a side of the second main surface. Each of the plurality of second semiconductor regions includes a first region including a textured surface, and a second region including no textured surface. A thickness of the first region at a deepest position of recesses of the textured surface is smaller than a distance between a surface of the second region and the deepest position in a thickness direction of the semiconductor substrate. The first main surface is a light incident surface of the semiconductor substrate.