Patent US4990724A successfully refreshed from Google Patents.
US4990724A
Expired / Lapsed
US
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Method and apparatus for electrically interconnecting opposite sides of a flex circuit
Assignee: Motorola Solutions Inc
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Filing: 1989-12-04
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Granted: 1991-02-05
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Expires: 2009-12-04
Abstract
Abstract Electrical interconnection of first and second sides of a flex circuit is provided by a tab formed in the flex circuit. At least one circuit trace extends along the tab and provides a contact area on the flex circuit first side. The tab is folded so that the contact area overlays the flex circuit second side. The contact area is then electrically interconnected as by reflow soldering to a contact area on the flex circuit second side.
Inventors
- 👤 Anthony B. Suppelsa
- 👤 Keith D. Soldner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:43
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/4038; H05K3/4084; H05K1/00; H05K1/02; H05K1/11; H05K1/118; H05K2201/00; H05K2201/09; H05K2201/09009; H05K2201/09081; H05K2201/10; H05K2201/10227; H05K2201/10363; H05K3/36; H05K3/361; H05K3/363; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49165; Y10T29/49167; Y10T29/49174; Y10T29/49181
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A method of interconnecting circuit traces on first and second sides of a flex circuit comprising the steps of: providing a tab in the flex circuit having at least one circuit trace including a contact area on its first side, folding the tab so that the contact area on its first side overlies the flex circuit second side, and electrically interconnecting said contact area and a contact area on the flex circuit second side to interconnect circuit traces on said first and second sides of the flex circuit.
Claim 2
Independent Claim
88 words
A method of interconnecting circuit traces on first and second sides of a flex circuit comprising the steps of: providing a tab in the flex circuit having at least one circuit trace including a contact area on its first side, folding the tab so that the contact area on its first side overlies the flex circuit second side, and electrically interconnecting said contact area and a contact area on the flex circuit second side to interconnect circuit traces on said first and second sides of the flex circuit.
Claim 3
Dependent Claim
40 words
A method of interconnecting circuit traces as defined in claim 1, in which: said step of providing a tab includes providing the tab having a longitudinal portion and a side portion in which the first side contact area is located.
Claim 4
Dependent Claim
24 words
A method of interconnecting circuit traces as defined in claim 1 in which said step of folding the tab includes fan folding the tab.
Claim 5
Dependent Claim
48 words
A method of interconnecting circuit traces as defined in claim 1 in which said tab includes a plurality of circuit traces each including a contact area, and the electrically interconnecting step includes interconnecting the plurality of contact areas with corresponding contact areas on the flex circuit second side.
Claim 6
Dependent Claim
55 words
A flexible circuit having electrically interconnected first and second sides comprising: a tab formed from the flexible circuit having a circuit trace on its first side, the tab being folded so that a portion of said circuit trace overlies and is electrically interconnected to a circuit trace on the second side of the flex circuit.
Claim 7
Dependent Claim
55 words
A flexible circuit having electrically interconnected first and second sides comprising: a tab formed from the flexible circuit having a circuit trace on its first side, the tab being folded so that a portion of said circuit trace overlies and is electrically interconnected to a circuit trace on the second side of the flex circuit.
Claim 8
Dependent Claim
61 words
A flexible circuit as defined in claim 5, in which: said tab includes a longitudinal portion and a side portion, said circuit trace includes a solder pad located on the side portion, and said second side circuit trace includes a solder pad which is soldered to said first side solder pad thereby electrically interconnecting said first and second side circuit traces.
Claim 9
Dependent Claim
56 words
A flexible circuit as defined in claim 6, in which: said tab includes a plurality of circuit traces on its first side, each solder trace including a solder pad located on said side portion, and said second side includes a plurality of circuit traces each including a solder pad soldered to a first side solder pad.
Claim 10
Dependent Claim
63 words
A flexible circuit as defined in claim 5, in which: said tab includes a longitudinal portion and two opposed side portions and a plurality circuit traces each having a solder pad, the solder pads being disposed on the two side portions, and said second side includes a plurality of circuit traces each including a solder pad soldered to a first side solder pad.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |