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:
Mar. 11, 2008
Filed:
Aug. 25, 2003
Hiroyuki Kumakura, Kanuma, JP;
Hiroyuki Kumakura, Kanuma, JP;
Sony Corporation, Tokyo, JP;
Sony Chemical & Information Device Corporation, Tokyo, JP;
Abstract
The present invention provides a method of manufacturing an electric device, wherein an adhesive applied on a flexible wiring board is heated to a first temperature to lower its viscosity to a sufficient level, after which a semiconductor chip is placed onto the adhesive at a preset location, so that no air is trapped in the adhesive. The adhesive is heated to a second temperature higher than the first temperature in a permanent bonding step to increase its viscosity, whereby any remaining voids are removed with residual adhesive being pushed aside. Having no voids in the adhesive, the resultant electric device is highly reliable in respect of conductivity.