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:
Oct. 12, 2004
Filed:
Jan. 25, 2001
Shinichi Minami, Kodaira, JP;
Yoshiaki Kamigaki, Tokorozawa, JP;
Hideki Yasuoka, Musashino, JP;
Fukuo Owada, Ome, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A plurality of connection holes for connecting n type semiconductor region of zener diodes (D , D ) and wires and to each other are not arranged in the center of the n type semiconductor region , that is, in a region in which a p type semiconductor region and the n type semiconductor region form a junction but is arranged in the periphery which is deeper than the center in junction depth. In addition, these connection holes are spaced from each other so that a pitch between the adjacent connection holes is greater than a minimum pitch between connection holes of the circuit, and thereby a substrate shaving quantity is reduced when the respective connection holes are formed by means of dry etching.