US3574257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic cutting of a substrate coated with thin layers
Assignee: Lignes Telegraphiques et Telephoniques LTT SA
•
Filing: 1969-04-28
•
Granted: 1971-04-13
•
Expires: 1989-04-28
Abstract
Abstract A process for cutting a substrate the surface of which bears a large number of identical or different components and which are formed at least to some extent by thin films. The substrate is kept stationary relatively to the cutting tool by immersion in a liquid and freezing thereof. The liquid may be water.
Inventors
- 👤 Georges Du Bois
- 👤 Ghislaine Goupil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:38
CPC Classifications
B; B28; B28D; B28D5/00; B28D5/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812; Y10T403/00; Y10T403/21; Y10T403/47; Y10T403/477; Y10T83/00; Y10T83/283
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
20 words
A process for precise cutting of a sheet bearing a plurality of highly delicate microcircuits consisting of the following steps:
Claim 2
Dependent Claim
20 words
A process for precise cutting of a sheet bearing a plurality of highly delicate microcircuits consisting of the following steps:
Claim 3
Dependent Claim
21 words
Positioning said sheet in a recess in a cutting slab bearing sawing grooves according to the sawing pattern for said sheet.
Claim 4
Dependent Claim
21 words
Positioning said sheet in a recess in a cutting slab bearing sawing grooves according to the sawing pattern for said sheet.
Claim 5
Dependent Claim
9 words
Filling said recess and said grooves with a liquid.
Claim 6
Dependent Claim
9 words
Filling said recess and said grooves with a liquid.
Claim 7
Dependent Claim
3 words
Freezing said liquid.
Claim 8
Dependent Claim
3 words
Freezing said liquid.
Claim 9
Dependent Claim
15 words
Sawing said sheet on said cutting slab according to the sawing pattern under continued freezing.
Claim 10
Dependent Claim
15 words
Sawing said sheet on said cutting slab according to the sawing pattern under continued freezing.
Claim 11
Dependent Claim
11 words
Unfreezing said liquid while maintaining said cut sheet parts through suction.
Claim 12
Dependent Claim
11 words
Unfreezing said liquid while maintaining said cut sheet parts through suction.
Claim 13
Dependent Claim
12 words
Removing said suction so that said parts are released in a receptacle.
Claim 14
Dependent Claim
12 words
Removing said suction so that said parts are released in a receptacle.
Claim 15
Dependent Claim
9 words
Filling said recess and said grooves with a liquid.
Claim 16
Dependent Claim
9 words
Filling said recess and said grooves with a liquid.
Claim 17
Dependent Claim
20 words
A process for precise cutting of a sheet bearing a plurality of highly delicate microcircuits consisting of the following steps:
Claim 18
Dependent Claim
20 words
A process for precise cutting of a sheet bearing a plurality of highly delicate microcircuits consisting of the following steps:
Claim 19
Dependent Claim
8 words
Filling said recess and said grooves with water.
Claim 20
Dependent Claim
8 words
Filling said recess and said grooves with water.
Claim 21
Dependent Claim
9 words
Filling said recess and said grooves with a liquid.
Claim 22
Dependent Claim
9 words
Filling said recess and said grooves with a liquid.
Claim 23
Dependent Claim
16 words
Freezing said liquid by circulating liquid nitrogen in a tubing cut in the cutting slab base.
Claim 24
Dependent Claim
16 words
Freezing said liquid by circulating liquid nitrogen in a tubing cut in the cutting slab base.
Claim 25
Dependent Claim
3 words
Freezing said water.
Claim 26
Dependent Claim
3 words
Freezing said water.
Claim 27
Dependent Claim
3 words
Freezing said liquid.
Claim 28
Dependent Claim
3 words
Freezing said liquid.
Claim 29
Dependent Claim
20 words
a process for precise cutting of a sheet bearing a plurality of highly delicate microcircuits consisting of the following steps:
Claim 30
Dependent Claim
20 words
a process for precise cutting of a sheet bearing a plurality of highly delicate microcircuits consisting of the following steps:
Claim 31
Dependent Claim
15 words
Sawing said sheet on said cutting slab according to the sawing pattern under continued freezing.
Claim 32
Dependent Claim
15 words
Sawing said sheet on said cutting slab according to the sawing pattern under continued freezing.
Claim 33
Dependent Claim
15 words
Sawing said sheet on said cutting slab according to the sawing pattern under continued freezing.
Claim 34
Dependent Claim
15 words
Sawing said sheet on said cutting slab according to the sawing pattern under continued freezing.
Claim 35
Dependent Claim
19 words
Sawing said sheet on said cutting slab according to the sawing pattern while flowing cooled nitrogen on the sheet.
Claim 36
Dependent Claim
19 words
Sawing said sheet on said cutting slab according to the sawing pattern while flowing cooled nitrogen on the sheet.
Claim 37
Dependent Claim
19 words
Unfreezing said liquid by means of a blow of hot air while maintaining said cut sheet parts through suction.
Claim 38
Dependent Claim
19 words
Unfreezing said liquid by means of a blow of hot air while maintaining said cut sheet parts through suction.
Claim 39
Dependent Claim
11 words
Unfreezing said water while maintaining said cut sheet parts through suction.
Claim 40
Dependent Claim
11 words
Unfreezing said water while maintaining said cut sheet parts through suction.
Claim 41
Dependent Claim
11 words
Unfreezing said liquid while maintaining said cut sheet parts through suction.
Claim 42
Dependent Claim
11 words
Unfreezing said liquid while maintaining said cut sheet parts through suction.
Claim 43
Dependent Claim
12 words
Removing said suction so that said parts are released in a receptacle.
Claim 44
Dependent Claim
12 words
Removing said suction so that said parts are released in a receptacle.
Claim 45
Dependent Claim
12 words
Removing said suction so that said parts are released in a receptacle.
Claim 46
Dependent Claim
12 words
Removing said suction so that said parts are released in a receptacle.
Claim 47
Dependent Claim
12 words
Removing said suction so that said parts are released in a receptacle.
Claim 48
Dependent Claim
12 words
Removing said suction so that said parts are released in a receptacle.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |