US4600970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leadless chip carriers having self-aligning mounting pads
Assignee: RCA Corp
•
Filing: 1984-05-29
•
Granted: 1986-07-15
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Expires: 2004-05-29
Abstract
Abstract A pad configuration for surface mounted components having contact pads along the periphery thereof includes a plurality of interior pads distributed in a grid with the period of interior pads being three quarters of the period of the peripheral pads multiplied by an integer greater than 1.
Inventors
- 👤 John A. Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:09
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/11; H05K1/111; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3431; H05K3/3442; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09781; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10719; H05K2201/10727; H05K2201/10954; H05K2201/10969; H05K2203/00; H05K2203/04; H05K2203/048; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
In a surface mounted chip carrier having a mounting surface having an outer periphery and an inner portion spaced from said outer periphery, said package having a plurality of solderable peripheral pads disposed on said mounting surface along the periphery thereof, a plurality of solderable interior pads disposed in spaced relation on said inner portion thereof, and said peripheral pads having widths and spacings parallel to a first end of said mounting surface in accordance with a first predetermined period, the improvement comprising: said interior pads adjacent said first end of said mounting surface being positioned along said first end in accordance with a second period which is equal to three quarters of said first period multiplied by an integer greater than one.
Claim 2
Dependent Claim
123 words
In a surface mounted chip carrier having a mounting surface having an outer periphery and an inner portion spaced from said outer periphery, said package having a plurality of solderable peripheral pads disposed on said mounting surface along the periphery thereof, a plurality of solderable interior pads disposed in spaced relation on said inner portion thereof, and said peripheral pads having widths and spacings parallel to a first end of said mounting surface in accordance with a first predetermined period, the improvement comprising: said interior pads adjacent said first end of said mounting surface being positioned along said first end in accordance with a second period which is equal to three quarters of said first period multiplied by an integer greater than one.
Claim 3
Dependent Claim
12 words
The carrier recited in claim 1 wherein said integer multiplier is two.
Claim 4
Dependent Claim
28 words
The carrier recited in claim 1 wherein: said interior pads have first widths and first spacings parallel to said first end of said mounting surface which are equal.
Claim 5
Dependent Claim
39 words
The carrier recited in claim 3 wherein: said interior pads have second widths and second spacings along a second end of said mounting surface which is perpendicular to said first end, said second widths and second spacings being equal.
Claim 6
Dependent Claim
14 words
The carrier recited in claim 4 wherein said first and second widths are equal.
Claim 7
Dependent Claim
59 words
The carrier recited in claim 1 wherein: said interior pads have first widths and first spacings parallel to said first end of said mounting surface; said interior pads have second widths and second spacings along a second end of said mounting surface which is perpendicular to said first end; and said first width is different from said second width.
Claim 8
Dependent Claim
54 words
The carrier recited in claim 1 wherein: said interior pads have first widths and first spacings parallel to said first end of said mounting surface; and said first width is different for interior pads at a first location on said surface than it is for interior pads at a second location on said surface.
Claim 9
Dependent Claim
61 words
The carrier recited in claim 7 wherein: said interior pads have second widths and second spacings parallel to a second end of said mounting surface which is perpendicular to said first end; and said second width is different for interior pads at a third location on said surface than it is for interior pads at a fourth location on said surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |