Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame – With stress relief
Reexamination Certificate
2006-09-22
2008-10-21
Pizarro, Marcos D. (Department: 2814)
Active solid-state devices (e.g., transistors, solid-state diode
Lead frame
With stress relief
C257S674000, C257SE23039
Reexamination Certificate
active
07439611
ABSTRACT:
A circuit board including a flexible insulating substrate, a plurality of conductive wirings placed in line on the flexible insulating substrate, and bumps provided at end portions of the respective conductive wirings positioned in a region for mounting a semiconductor chip is provided. The circuit board further includes an auxiliary conductive wiring positioned at an outermost corner of the region for mounting the semiconductor chip, being adjacent to and an outside the outermost conductive wiring, and an auxiliary bump formed on the auxiliary conductive wiring in line with the bumps on the conductive wirings. One end portion of the auxiliary conductive wiring is terminated at a position in the outside vicinity of the auxiliary bump in an outward direction of the region for mounting the semiconductor chip, and the auxiliary conductive wiring is bent at the other end portion positioned inside the auxiliary bump in an inward direction of the region for mounting the semiconductor chip, and connected to an end of the adjacent outermost conductive wiring. A break in the outermost conductive wiring, which is caused by concentrated stress at the time of joining the bumps of the circuit board and electrode pads of the semiconductor chip, can be suppressed.
REFERENCES:
patent: 5138438 (1992-08-01), Masayuki et al.
patent: 6064112 (2000-05-01), Iwaya et al.
patent: 6097081 (2000-08-01), Masuda et al.
patent: 6509639 (2003-01-01), Lin
patent: 2004/0212969 (2004-10-01), Imamura et al.
patent: 2007/0057369 (2007-03-01), Imamura et al.
patent: 2004-327936 (2004-11-01), None
Imamura Hiroyuki
Koutani Nobuyuki
Nakamura Yoshifumi
Tokushima Kenshi
Hamre Schumann Mueller & Larson P.C.
Matsushita Electric - Industrial Co., Ltd.
Montalvo Eva
Pizarro Marcos D.
LandOfFree
Circuit board with auxiliary wiring configuration to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit board with auxiliary wiring configuration to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit board with auxiliary wiring configuration to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3992301