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. 17, 2014
Filed:
Sep. 12, 2012
Seiji Otake, Kumagaya, JP;
Yasuhiro Takeda, Ora-gun, JP;
Yuta Miyamoto, Ora-gun, JP;
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Abstract
An ESD protection element is formed by a PN junction diode including an N+ type buried layer having a proper impurity concentration and a P+ type buried layer and a parasitic PNP bipolar transistor which uses a P+ type drawing layer connected to a P+ type diffusion layer as the emitter, an N− type epitaxial layer as the base, and a P type semiconductor substrate as the collector. The P+ type buried layer is connected to an anode electrode, and the P+ type diffusion layer and an N+ type diffusion layer connected to and surrounding the P+ type diffusion layer are connected to a cathode electrode. When a large positive static electricity is applied to the cathode electrode, the parasitic PNP bipolar transistor turns on to flow a large discharge current.