US 4,544,619 AGranted

Photosensitive laminate

AssigneeShipley Company, L.L.C.

InventorsCarl W. Christensen, Calvin Isaacson

Life of this patent

Estimating the term…

Loading patent…

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, photoimaging 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.

Claims10

Dependent claims

A process for forming a photoresist on a surface which comprises

(a) adhering a light sensitive laminate to said surface to form a composite, said light sensitive laminate comprising an undeveloped light sensitive layer of a photoresist material free of photographic silver halide emulsion, a support layer therefor and a light transmitting intermediate protective layer between said light sensitive layer and said support layer, said light sensitive layer being firmly adhered to said intermediate layer and said support layer being loosely adhered to said intermediate layer relative to said light sensitive layer, said light sensitive layer being in contact with said surface;
(b) stripping the support layer from the composite so formed, leaving behind the photoresist material and intermediate layer with the photoresist material in contact with the surface;
(c) exposing the composite so formed image wise to a source of radiation to form a latent image in said light sensitive layer;
and
(d) developing said latent image with a developer that is a solvent for the intermediate layer and first dissolves said intermediate layer and then develops the light sensitive layer.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/584,775Filed 29 Feb 1984 · division
Priority: 3 Mar 1970
Granted: 1 Oct 1985
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G03F 7/161
Coating processes; Apparatus therefor: using a previously coated surface, e.g. by stamping or by transfer lamination
G03C 1/52
Photosensitive materials: compositions containing diazo compounds as photosensitive substances
G03C 1/74
Photosensitive materials: applying photosensitive compositions to the base; Drying processes therefor
H05K 3/0073
Apparatus or processes for manufacturing printed circuits: masks not provided for in groups H05K3/02 - H05K3/46, e.g. for photomechanical…