US20070178751A1
Active / In Force
US
⏱️ 0.3 years remaining
High density flexible wiring board
Assignee: Funai Electric Co Ltd
•
Filing: 2007-02-01
•
Granted: —
•
Expires: 2027-02-01
Abstract
Abstract A high density flexible wiring connection device comprises a flexible flat cable (FFC) having narrow-pitch conductors and a flat cable connector (FC connector) having a double-sided contact designed for narrow-pitch wiring and having upper and lower contact terminals. A supplementary wiring board having upper and lower wiring terminals is introduced to connect alternate ones and the other alternate ones of the narrow-pitch conductors of the FFC to alternate ones of the upper contact terminals and alternate ones of the lower contact terminals of the FC connector, respectively, thereby making the pitch of each of the upper and lower wiring terminals twice the narrow pitch of the FFC and the FC connector. The use of the supplementary wiring board to thus convert the wiring pitch makes it possible to prevent whiskers, even if formed on the contact terminals, from causing short-circuits between adjacent contact terminals and between adjacent wiring terminals.
Inventors
- 👤 Eiji Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:05
CPC Classifications
H; H01; H01R; H01R12/00; H01R12/70; H01R12/77; H01R12/79; H05; H05K; H05K1/00; H05K1/02; H05K1/11; H05K1/118; H05K1/117; H05K1/14; H05K1/141; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/097; H05K2203/00; H05K2203/15; H05K2203/1572
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
257 words
1 . A high density flexible wiring connection device comprising: a flexible flat cable having narrow-pitch parallel conductors; a flat cable connector having a double-sided contact designed for narrow-pitch wiring and having upper and lower contact terminals to be electrically connected to the narrow-pitch conductors of the flexible flat cable, the flat cable connector being mounted on a printed circuit board; and an supplementary wiring board having upper wiring terminals and lower wiring terminals provided on upper and lower surfaces thereof for connecting the flexible flat cable and the flat cable connector, such that one ends of the upper wiring terminals of the supplementary wiring board are connected to alternate ones of the narrow-pitch conductors, and one ends of the lower wiring terminals of the supplementary wiring board are connected to the other alternate ones of the narrow-pitch conductors, while the other ends of the upper wiring terminals of the supplementary wiring board are connected to alternate ones of the upper contact terminals of the flat cable connector, and the other ends of the lower wiring terminals of the supplementary wiring board are connected to alternate ones of the lower contact terminals of the flat cable connector, whereby the upper wiring terminals as well as the lower wiring terminals of the supplementary wiring board have a wide pitch twice as large as the narrow pitch of the narrow-pitch conductors, thereby preventing whiskers from causing short-circuits between adjacent ones of the upper contact terminals and between adjacent ones of the lower contact terminals of the flat cable connector.
Claim 2
Dependent Claim
257 words
1 . A high density flexible wiring connection device comprising: a flexible flat cable having narrow-pitch parallel conductors; a flat cable connector having a double-sided contact designed for narrow-pitch wiring and having upper and lower contact terminals to be electrically connected to the narrow-pitch conductors of the flexible flat cable, the flat cable connector being mounted on a printed circuit board; and an supplementary wiring board having upper wiring terminals and lower wiring terminals provided on upper and lower surfaces thereof for connecting the flexible flat cable and the flat cable connector, such that one ends of the upper wiring terminals of the supplementary wiring board are connected to alternate ones of the narrow-pitch conductors, and one ends of the lower wiring terminals of the supplementary wiring board are connected to the other alternate ones of the narrow-pitch conductors, while the other ends of the upper wiring terminals of the supplementary wiring board are connected to alternate ones of the upper contact terminals of the flat cable connector, and the other ends of the lower wiring terminals of the supplementary wiring board are connected to alternate ones of the lower contact terminals of the flat cable connector, whereby the upper wiring terminals as well as the lower wiring terminals of the supplementary wiring board have a wide pitch twice as large as the narrow pitch of the narrow-pitch conductors, thereby preventing whiskers from causing short-circuits between adjacent ones of the upper contact terminals and between adjacent ones of the lower contact terminals of the flat cable connector.
Claim 3
Dependent Claim
188 words
2 . The high density flexible wiring connection device according to claim 1 , wherein the alternate ones of the narrow-pitch conductors are provided at the wide pitch twice as large as the narrow pitch on and over entire length of the upper surface of the flexible flat cable, and are contiguous to the upper wiring terminals provided at the wide pitch twice as large as the narrow pitch on and over entire length of the upper surface of the supplementary wiring board, while the other alternate ones of the narrow-pitch conductors are provided at the wide pitch twice as large as the narrow pitch on and over entire length of the lower surface of the flexible flat cable, and are contiguous to the lower wiring terminals provided at the wide pitch twice as large as the narrow pitch on and over entire length of the lower surface of the supplementary wiring board, such the alternate ones of the narrow-pitch conductors and the upper wiring terminals are staggered and alternately intervened with respect to the other alternate ones of the narrow-pitch conductors and the lower wiring terminals, respectively.
Claim 4
Dependent Claim
39 words
3 . The high density flexible wiring connection device according to claim 1 , wherein all the narrow-pitch conductors of the flexible flat cable are formed at the narrow pitch on a flat plane in the supplementary wiring board.
Claim 5
Dependent Claim
29 words
4 . The high density flexible wiring connection device according to claim 1 , wherein adjacent ones of the contact terminals has a gap distance larger than 0.15 mm.
Claim 6
Dependent Claim
30 words
5 . The high density flexible wiring connection device according to claim 4 , wherein the narrow pitch of the contact terminals of the flat cable connector is 0.5 mm.
References Cited (Backward Citations)
US5236372A
Cited
US5219292A
Cited
US6017244A
Cited
US20060286858A1
Cited
US20070037440A1
Cited
US20040244193A1
Cited
US20050176288A1
Cited
US20060110951A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.