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:
Jun. 25, 1996
Filed:
Aug. 05, 1994
Naohiko Hirano, Kawasaki, JP;
Kazuhide Doi, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A semiconductor device includes a rectangular wiring substrate and a plurality of semiconductor elements having connecting electrodes such as projecting electrodes connected to the wiring substrate. Even though the wiring substrate is deformed, the semiconductor elements and connecting electrodes are prevented from being broken, thereby maintaining the reliability of the semiconductor device for a long period of time. A buffer region constituted by grooves is formed in that middle part of the undersurface of the rectangular wiring substrate which is located between both the long sides of the wiring substrate and between both the short sides thereof. The semiconductor elements are formed outside the buffer region. The connecting electrodes of the semiconductor elements are connected to a wiring pattern on the surface of the wiring substrate, with the result that the semiconductor elements are mounted on the wiring substrate. The deformation of the buffer region absorbs a deformation of that part of the wiring substrate which is located near the semiconductor elements mounted on the wiring substrate thereby to protect the semiconductor elements.