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:
May. 11, 2004
Filed:
Aug. 23, 2002
Tz-Cheng Chiu, Plano, TX (US);
Mohammad Yunus, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Electronic devices of improved reliability having a substrate of electrically insulating material, further an integrated circuit chip with a periphery and a surface. Using a layer of polymeric material, the chip surface is mounted on the substrate surface. The polymeric material protrudes beyond the chip periphery and spreads some distance along the substrate surface. A metal layer is on the substrate surface, this layer is shaped as a band around the chip periphery; the band has an inner edge near the chip periphery, and an outer edge near the contour of the polymer protrusion. This metal band serves as a guard ring to stop any nascent crack propagating in the polymer protrusion.