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:
Mar. 23, 2021
Filed:
Jul. 12, 2019
Rohm Co., Ltd., Kyoto, JP;
Takahiro Arakawa, Kyoto, JP;
Junya Yamagami, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
A bidirectional Zener diode includes a substrate, a first conductivity type base region formed at a front surface portion of the substrate, a second conductivity type first impurity region formed at the base region, a second conductivity type second impurity region formed at the base region away from the first impurity region, an insulating layer formed on a front surface of the substrate, a first electrode film formed on the insulating layer and electrically connected to the first impurity region, and a second electrode film formed on the insulating layer and electrically connected to the second impurity region, and a first region formed on the insulating layer, the first region being sandwiched between the first electrode film and the second electrode film, and the first region including a portion having an aspect ratio of 1 or larger.