Patent US3678892A successfully refreshed from Google Patents.
US3678892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pallet and mask for substrates
Assignee: AT&T Inc
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Filing: 1970-05-19
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Granted: 1972-07-25
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Expires: 1990-05-19
Abstract
Abstract A pallet and a mask for use in the manufacture of thin film components are machined from a block of high density fine grain pressed graphite to the desired size and shape. The graphite pallet and mask are plated with a flash of copper so that the copper may be dissolved or reacted with an acid to release the layer of precious metals which accumulate during repeated use of the pallet and mask. Thin film substrates are placed in the pallet and covered by the mask. In use, the assembled pallet and mask are inverted such that gravity forces the substrates against the mask to insure that the metal is deposited only on the desired areas of the substrate.
Inventors
- 👤 Albert R Fairchild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:46
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/04; C23C14/042; H; H05; H05K; H05K3/00; H05K3/10; H05K3/14; H05K3/143
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
A masking arrangement for handling and masking a plurality of substrates while a precious metal is deposited thereon and from which the precious metal may be removed without destroying the mask, comprising: a pallet for receiving and holding the plurality of substrates in an aligned configuration; a mask for mating with said pallet such that when said mask and pallet are inverted gravity forces the substrates against said mask leaving only the desired areas of the substrates exposed: both said pallet and mask made from graphite and having a thin coating of easily dissolvable metal on surfaces of said mask and pallet exposed to the depositing precious metal; said easily dissolvable metal being removable by an acid solution which does not attach or dissolve the precious metal or the graphite; and means for securing said mask and pallet together.
Claim 2
Dependent Claim
139 words
A masking arrangement for handling and masking a plurality of substrates while a precious metal is deposited thereon and from which the precious metal may be removed without destroying the mask, comprising: a pallet for receiving and holding the plurality of substrates in an aligned configuration; a mask for mating with said pallet such that when said mask and pallet are inverted gravity forces the substrates against said mask leaving only the desired areas of the substrates exposed: both said pallet and mask made from graphite and having a thin coating of easily dissolvable metal on surfaces of said mask and pallet exposed to the depositing precious metal; said easily dissolvable metal being removable by an acid solution which does not attach or dissolve the precious metal or the graphite; and means for securing said mask and pallet together.
Claim 3
Dependent Claim
15 words
A masking arrangement as defined in claim 1 wherein said easily dissolvable metal is copper.
References Cited (Backward Citations)
US184662A
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US2239770A
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US2475434A
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US3302612A
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US3526555A
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US3556951A
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |