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:
Sep. 24, 2002
Filed:
Apr. 13, 2001
Mu-Chun Wang, Hsinchu Hsien, TW;
United Microelectronic Corp., Hsicnhu, TW;
Abstract
A structure of a cross guard ring along the edge of a semiconductor chip is disclosed. A first guard ring, a second guard ring and a third guard ring are formed along the edge of a semiconductor chip. Each guard ring comprises several rectangle shaped vias which are positioned along the edge of the chip structure, wherein each rectangle via is separated from an adjacent rectangle via by a gap. Further, each rectangle via of the second guard ring is positioned opposite the said gap of the first guard ring and are crossed over and have some overlay with rectangle vias of the first guard ring which are separated by the said gap as shown in FIG. 2. Similarly the third guard ring is positioned with respect to the second guard ring.