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. 15, 2005
Filed:
Feb. 21, 2003
Mitsuaki Katagiri, Nishitokyo, JP;
Masami Usami, Ome, JP;
Kenji Ujiie, Kokubunji, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A flip-chip BGA is disclosed which exhibits an excellent high-speed electric transmission characteristic while minimizing the formation of voids in sealing resin filled between a semiconductor chip and a wiring substrate. A silicon chip is flip-chip-mounted on a package substrate, and in a central area of a main surface of the silicon chip are arranged a power supply circuit, an input/output circuit, and plural bonding pads, while in the other area than the central area are arranged solder bumps in a matrix form, the solder bumps being electrically connected to the bonding pads through Cu wiring. Of the solder bumps, solder bumps for input/output power supply and solder bumps for the input and output of a data signal are arranged in a first area adjacent to the central area, and solder bumps for address signal input are arranged in a second area located outside the first area.