Patent US3559352A successfully refreshed from Google Patents.
US4530896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive laminate
Assignee: Shipley Co Inc
•
Filing: 1972-05-16
•
Granted: 1985-07-23
•
Expires: 1992-05-16
Abstract
Abstract This invention relates to a light-sensitive laminate comprising a light-sensitive layer of photoresist, a support therefor, and an intermediate protective layer preferably of a light-transmitting material disposed between said photoresist layer and said support. In use, the photoresist layer of the laminate is adhered to a base material and the support stripped therefrom, thereby leaving a composite comprising the base material, photoresist layer and intermediate protective layer disposed over said photoresist layer. The intermediate layer serves to protect the photoresist layer from damage such as by abrasion or otherwise during processing, thereby permitting storage of the so-formed composite prior to use. Since the intermediate layer may be of a light-transmitting material, photo-imaging may take place through the intermediate layer with the intermediate layer subsequently removed by contact with a solvent that is a non-solvent for those areas of photoresist left after development.
Inventors
- 👤 Carl W. Christensen
- 👤 Calvin Isaacson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:00
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/16; G03F7/161; G03C; G03C1/00; G03C1/52; G03C1/74; H; H05; H05K; H05K3/00; H05K3/0073
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
89 words
A composite consisting of a light sensitive laminate adhered to a substrate, said light sensitive laminate comprising an unexposed and undeveloped light-sensitive layer of a photoresist material, a support layer therefore, and an intermediate protective layer between said light-sensitive layer and said support layer, said intermediate layer being optically transmitting and soluble in developer for said light sensitive layer, said light-sensitive layer being firmly adhered to said intermediate layer and to said substrate and said support layer being loosely adhered to said intermediate layer relative to said light-sensitive layer.
Claim 2
Dependent Claim
89 words
A composite consisting of a light sensitive laminate adhered to a substrate, said light sensitive laminate comprising an unexposed and undeveloped light-sensitive layer of a photoresist material, a support layer therefore, and an intermediate protective layer between said light-sensitive layer and said support layer, said intermediate layer being optically transmitting and soluble in developer for said light sensitive layer, said light-sensitive layer being firmly adhered to said intermediate layer and to said substrate and said support layer being loosely adhered to said intermediate layer relative to said light-sensitive layer.
Claim 3
Dependent Claim
16 words
The composite of claim 1 where the intermediate layer has a maximum thickness of 1 mil.
Claim 4
Dependent Claim
16 words
The composite of claim 2 where the light-sensitive layer has a maximum thickness of 0.3 mils.
Claim 5
Dependent Claim
24 words
The composite of claim 1 where the intermediate layer is soluble in a member selected from the group of water and aqueous alkaline solution.
Claim 6
Dependent Claim
13 words
The composite of claim 1 where the light-sensitive layer comprises a diazo photoresist.
Claim 7
Dependent Claim
90 words
A composite consisting of a light-sensitive laminate adhered to a circuit board base material, said light-sensitive laminate comprising an unexposed and undeveloped light-sensitive layer of a diazo photoresist material, a support layer therefore and an intermediate, optically-transmitting protective layer having a miximum thickness of 1 mil, said intermediate layer being soluble in developer for said diazo photoresist material, said light-sensitive layer being firmly adhered to said intermediate layer and said circuit board base material and said support layer being loosely adhered to said intermediate layer relative to said light-sensitive layer.
Claim 8
Dependent Claim
90 words
A composite consisting of a light-sensitive laminate adhered to a circuit board base material, said light-sensitive laminate comprising an unexposed and undeveloped light-sensitive layer of a diazo photoresist material, a support layer therefore and an intermediate, optically-transmitting protective layer having a miximum thickness of 1 mil, said intermediate layer being soluble in developer for said diazo photoresist material, said light-sensitive layer being firmly adhered to said intermediate layer and said circuit board base material and said support layer being loosely adhered to said intermediate layer relative to said light-sensitive layer.
Claim 9
Dependent Claim
16 words
The composite of claim 6 where the intermediate layer has a maximum thickness of 0.3 mils.
Claim 10
Dependent Claim
25 words
The composite of claim 6 where the intermediate layer is soluble in a member selected from the group consisting of water and aqueous alkaline solution.
Claim 11
Dependent Claim
25 words
The composite of claim 6 where the light-sensitive layer comprises a positive-working diazo photoresist material which becomes developable in alkaline solution in light exposed areas.
Claim 12
Dependent Claim
22 words
The composite of claim 6 where the circuit board base material is selected from the group of metals, plastics, ceramics and semi-conductors.
Claim 13
Dependent Claim
28 words
The composite of claim 6 where the circuit board base material comprises a plastic layer clad with metal and the light-sensitive layer is in contact with said metal.
Claim 14
Dependent Claim
59 words
Light sensitive transfer material comprising a support, a light sensitive layer free of photographic silver halide emulsion and a thin intermediate release layer of low permeability to the oxygen of the air, which does not become tacky when heated at a temperature of 150° C. and has a greater adhesion to said light sensitive layer than to said support.
Claim 15
Dependent Claim
59 words
Light sensitive transfer material comprising a support, a light sensitive layer free of photographic silver halide emulsion and a thin intermediate release layer of low permeability to the oxygen of the air, which does not become tacky when heated at a temperature of 150° C. and has a greater adhesion to said light sensitive layer than to said support.
Claim 16
Dependent Claim
20 words
Material according to claim 12, in which the release layer is soluble or swellable in aqueous or aqueous alkaline solutions.
Claim 17
Dependent Claim
15 words
Material according to claim 12, in which the release layer is a film-forming organic substance.
Claim 18
Dependent Claim
31 words
Material according to claim 14, in which the release layer is a high-polymer organic substance with an aliphatic chain which contains no more than 50 percent of units with aromatic substituents.
Claim 19
Dependent Claim
15 words
Material according to claim 12, in which the light-sensitive thermoplastic layer is a photopolymer layer.
Claim 20
Dependent Claim
13 words
Material according to claim 12, in which the release layer is polyvinyl alcohol.
Claim 21
Dependent Claim
12 words
Material according to claim 12, in which the release layer is gelatin.
Claim 22
Dependent Claim
18 words
Material according to claim 12 in which the release layer has a thickness of 0.1 to 0.3 mils.
Claim 23
Dependent Claim
21 words
A light sensitive transfer material according to claim 12 in which the light sensitive thermoplastic layer contains a dye or pigment.
Claim 24
Dependent Claim
90 words
A process for the production of a copy on a support which comprises laminating the support, with heating, to a free surface of a thermoplastic light-sensitive layer on a temporary support, stripping said temporary support, and image-wise exposing and developing said light-sensitive layer, said light-sensitive layer and temporary support having a thin intermediate release layer of low permeability to the oxygen of the air which does not become tacky when heated at temperatures up to 150° C. and has a greater adhesion to said light-sensitive layer than to said support.
Claim 25
Dependent Claim
90 words
A process for the production of a copy on a support which comprises laminating the support, with heating, to a free surface of a thermoplastic light-sensitive layer on a temporary support, stripping said temporary support, and image-wise exposing and developing said light-sensitive layer, said light-sensitive layer and temporary support having a thin intermediate release layer of low permeability to the oxygen of the air which does not become tacky when heated at temperatures up to 150° C. and has a greater adhesion to said light-sensitive layer than to said support.
Claim 26
Dependent Claim
89 words
A process for the production of a copy on a support which comprises laminating the support, with heating, to a free surface of a light-sensitive layer on a temporary support, stripping said temporary support, and image-wise exposing and developing said light-sensitive layer, said light-sensitive layer and temporary support having a thin intermediate release layer of low permeability to the oxygen of the air which does not become tacky when heated at temperature up to 150° C. and has a greater adhesion to said light-sensitive layer than to said support.
Claim 27
Dependent Claim
89 words
A process for the production of a copy on a support which comprises laminating the support, with heating, to a free surface of a light-sensitive layer on a temporary support, stripping said temporary support, and image-wise exposing and developing said light-sensitive layer, said light-sensitive layer and temporary support having a thin intermediate release layer of low permeability to the oxygen of the air which does not become tacky when heated at temperature up to 150° C. and has a greater adhesion to said light-sensitive layer than to said support.
Claim 28
Dependent Claim
28 words
A process according to claim 21, in which the light-sensitive layer is a photoresist layer and the final support is etched or electroplated after development of the image.
References Cited (Backward Citations)
US3402044A
Cited
US3458311A
Cited
US3526504A
Cited
US3492121A
Cited
US3573975A
Cited
US3884693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |