Patent US4404079A successfully refreshed from Google Patents.
US4404079A
Expired / Lapsed
US
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Plating mask support
Assignee: National Semiconductor Corp
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Filing: 1982-02-08
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Granted: 1983-09-13
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Expires: 2002-02-08
Abstract
Abstract An electroplating mask support structure of particular use in the plating of semiconductor chip lead frames in which a support bar has a number of support stations thereon with masking die containing cavities in the stations.
Inventors
- 👤 Hooshang Jahani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:09
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/02; H; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/202; H05K3/22; H05K3/24; H05K3/241; H05K3/243
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
In combination with a plating system for plating selected portions of a web of material, a masking apparatus comprising: a support member; a plurality of support stations on said member at locations aligned with selected areas on the web of material, which areas are to be protected from plating solution; a die supporting cavity in each of said support stations; and masking dies shaped to be removably insertable in said cavities.
Claim 2
Dependent Claim
71 words
In combination with a plating system for plating selected portions of a web of material, a masking apparatus comprising: a support member; a plurality of support stations on said member at locations aligned with selected areas on the web of material, which areas are to be protected from plating solution; a die supporting cavity in each of said support stations; and masking dies shaped to be removably insertable in said cavities.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1, including an air pressure relief hole in said cavities.
Claim 4
Dependent Claim
22 words
The apparatus of claim 1 in which said cavity and said die are both shaped to match the area to be protected.
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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |