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US 4,429,027 AGranted
Photoimaging process
AssigneeE. I. Du Pont de Nemours and Company
InventorsVaughan C. Chambers, Jr., Joseph E. Gervay
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Abstract
A simplified method for photoimaging a photosensitive layer produces in situ a radiation-opaque photomask on the photosensitive layer or on a cover sheet of the layer. A nonvisible latent image is toned and the toner is transferred to a layer or cover sheet to form an actinic radiation-opaque photomask.
Claims5
A process for photoimaging a photosensitive layer comprising the steps:
- (a) forming in situ an actinic radiation-opaque image on a transparent cover sheet which is on the photosensitive layer;
- (b) exposing the image-bearing layer to actinic radiation by which the layer is photoimaged;
- (c) removing the cover sheet;
- and
- (d) developing or fixing the photoimage.
2 more elements
Dependencies are inferred from the claim text.