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:
Jul. 23, 1991
Filed:
Jul. 13, 1990
Martin J Alter, Los Altos, CA (US);
Clyde M Brown, Jr, Cupertino, CA (US);
James B Compton, Los Gatos, CA (US);
Micrel Inc., Sunnyvale, CA (US);
Abstract
A method is disclosed for forming a shorting contact for shorting P-type and N-type conductivity regions in a semiconductor together. In one embodiment of this method, the P-type region is substantially a square and is surrounded by the N-type region. A substantially square contact opening is made to expose the P-type region and a portion of the N-type region. Sides of the contact opening are formed to be at substantially 45 degree angles with respect to sides of the substantially square P-type region. In this manner, the alignment tolerance for forming the contact opening is less critical than if the sides of the contact opening were parallel to the sides of the P-type region. The contact opening is then filled with a conductive material to electrically short the P-type region to the N-type region. The conductivity types in this example may be reversed.