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. 01, 2009
Filed:
Dec. 06, 2005
Kiyonori Watanabe, Tokyo, JP;
Kiyonori Watanabe, Tokyo, JP;
Oki Semiconductor Co., Ltd., Tokyo, JP;
Abstract
A semiconductor device includes a semiconductor substrate with circuit elements and electrode pads formed on one surface. This surface is covered by a dielectric layer with openings above the electrode pads. A metal layer is deposited on the dielectric layer and patterned to form a conductive pattern with traces leading to the electrode pads. A protective layer having openings exposing part of the conductive pattern is formed. Each opening is covered by an electrode such as a solder bump, which is electrically connected through the conductive pattern to one of the electrode pads. This structure enables the thickness of the protective layer, which may function as a package of the semiconductor device, to be reduced. The protective layer may be formed from a photosensitive material, simplifying the formation of the openings for the electrodes.