US5357060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern structure of a printed circuit board
Assignee: NEC Corp
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Filing: 1992-09-02
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Granted: 1994-10-18
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Expires: 2012-09-02
Abstract
Abstract A pattern structure of a printed circuit board for mounting various kinds of electronic chip parts. The printed circuit board has a pad in each of a circuit connecting portion and a ground circuit portion thereof. A broad continuous ground pattern is formed with cuts to provide the pad in the ground circuit portion with substantially the same size or area as the pad in the circuit connecting portion. The pad in the ground circuit portion is connected to copper foil surrounding the cuts.
Inventors
- 👤 Koji Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:55
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/11; H05K1/111; H05K1/0201; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3431; H05K3/3442; H05K2201/00; H05K2201/06; H05K2201/062; H05K2201/07; H05K2201/0707; H05K2201/0715; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/0969; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10636; H05K3/3452; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
A pattern structure of a printed circuit board for a surface mounting device, comprising: a first pad connected to a signal line; a second pad provided in a ground pattern portion; and a cut formed in a peripheral portion of said second pad to trim said second pad to have an area that is substantially the same as the area of said first pad.
Claim 2
Dependent Claim
64 words
A pattern structure of a printed circuit board for a surface mounting device, comprising: a first pad connected to a signal line; a second pad provided in a ground pattern portion; and a cut formed in a peripheral portion of said second pad to trim said second pad to have an area that is substantially the same as the area of said first pad.
Claim 3
Dependent Claim
27 words
A pattern structure as claimed in claim 1, wherein said first pad and said second pad are on the same surface of a single printed circuit board.
Claim 4
Dependent Claim
63 words
A pattern structure as claimed in claim 1, wherein a width of said cut of said second pad and a width of a remaining pattern of a connecting portion, which is defined by said cut and which is contiguous with said ground pattern portion, are such that said first pad and said second pad are heated at substantially a same rate during reflow.
Claim 5
Dependent Claim
24 words
A pattern structure as claimed in claim 3, wherein said remaining pattern of said connecting portion is positioned at each side of said pad.
Claim 6
Dependent Claim
24 words
A pattern structure as claimed in claim 1, wherein peripheries of said first pad and said second pad are covered with a solder resist.
References Cited (Backward Citations)
US4996629A
Cited
US5048747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |