Patent US4490087A successfully refreshed from Google Patents.
US4490087A
Expired / Lapsed
US
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Elevating jig for semi-conductor wafers and similar articles
Assignee: Nortel Networks Ltd
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Filing: 1982-07-27
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Granted: 1984-12-25
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Expires: 2002-07-27
Abstract
Abstract An elevating jig, particularly suitable for elevating selected semi-conductor wafers in boat or holding member, has a base and a plurality of removable lift members which fit in apertures in the base. A locating member is provided at one end of the base for positioning a holding member on the base and the apertures in the base are at predetermined positions from the locating member. Lift members can be positioned as desired and when a holding member is placed on the jig certain wafers are lifted up, enabling easy withdrawal.
Inventors
- 👤 John F. Ryan
- 👤 John G. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:18
CPC Classifications
H; H10; H10P; H10P72/00; Y; Y10; Y10S; Y10S206/00; Y10S206/832; Y10S414/00; Y10S414/135; Y10S414/137; Y10S414/138
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
An elevating jig for lifting selected semiconductor wafers from a wafer holding member carrying a plurality of wafers in a parallel closely spaced array, comprising: a base member; a plurality of spaced parallel slots in said base member; a plurality of removable upwardly extending lift members positioned in said slots at predetermined positions corresponding to the positions of said selected semiconductor wafers in said wafer holding member, each of said lift members including means for supporting a wafer; a locating member at one end of said base member, said locating member having a predetermined location relative to said slots; said predetermined positions of said lift members being such that said lift members project up through openings in a lower portion of said wafer holding member when said holding member is positioned on said base member, to lift said selected wafers in said holding member.
Claim 2
Dependent Claim
144 words
An elevating jig for lifting selected semiconductor wafers from a wafer holding member carrying a plurality of wafers in a parallel closely spaced array, comprising: a base member; a plurality of spaced parallel slots in said base member; a plurality of removable upwardly extending lift members positioned in said slots at predetermined positions corresponding to the positions of said selected semiconductor wafers in said wafer holding member, each of said lift members including means for supporting a wafer; a locating member at one end of said base member, said locating member having a predetermined location relative to said slots; said predetermined positions of said lift members being such that said lift members project up through openings in a lower portion of said wafer holding member when said holding member is positioned on said base member, to lift said selected wafers in said holding member.
Claim 3
Dependent Claim
21 words
A jig as claimed in claim 1, each slot extending laterally on either side of an axis extending along said base.
Claim 4
Dependent Claim
60 words
A jig as claimed in claim 2, each lift member of a flat, plate-like, formation, and having a recessed portion at the bottom at each side to form a portion of reduced width, said recessed portion being a sliding fit in a slot, lateral edges at the top of said recessed portion resting on the top surface of said base.
Claim 5
Dependent Claim
20 words
A jig as claimed in claim 1 wherein said supporting means comprises a Vee-shaped groove extending along a top edge.
Claim 6
Dependent Claim
35 words
A jig as claimed in claim 1, said locating member extending upward from said base, and a guide member attached to each side of the locating member, said guide members extending forward over said base.
Claim 7
Independent Claim
133 words
A method of elevating selected semiconductor wafers mounted in a semiconductor wafer holding member by use of an elevating jig having a base member, a plurality of spaced parallel slots in the base member, a pluarlity of removable, upwardly extending lift members, and a locating member at one end of the base member, said method comprising: positioning said lift members in slots at predetermined positions corresponding to the positions of the semiconductor wafers to be elevated; positioning said semiconductor wafer holding member against said locating member so that said lift members are aligned with the wafers to be elevated through openings in the bottom of said holding member; and lowering said holding member onto said base member such that said lift members project upwardly through said openings and elevate said selected semiconductor wafers.
Claim 8
Independent Claim
133 words
A method of elevating selected semiconductor wafers mounted in a semiconductor wafer holding member by use of an elevating jig having a base member, a plurality of spaced parallel slots in the base member, a pluarlity of removable, upwardly extending lift members, and a locating member at one end of the base member, said method comprising: positioning said lift members in slots at predetermined positions corresponding to the positions of the semiconductor wafers to be elevated; positioning said semiconductor wafer holding member against said locating member so that said lift members are aligned with the wafers to be elevated through openings in the bottom of said holding member; and lowering said holding member onto said base member such that said lift members project upwardly through said openings and elevate said selected semiconductor wafers.
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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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |