Process of forming powder pattern using positive diazonium salt

Details Process of forming powder pattern using positive diazonium salt Process of forming powder pattern using positive diazonium salt

1983-09-12

1985-08-27

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Powder development of tacky surface

430 23, 430 25, 430 28, 430 29, 430145, 430149, 430150, 430176, 430180, 430181, 430326, G03C 534, G03C 518, G03F 708, G03F 726

Patent

active

045378517

ABSTRACT:
A water-soluble, positive-working photoresist composition is disclosed which comprises water-soluble aromatic diazonium salt, water-soluble phenolic compound, and water-soluble polymeric compound. When the film of this composition is irradiated with a pattern of actinic ray and then brought into contact with an alkaline gas or solution, the coating of unexposed areas hardens to become water-insoluble. Preferably, when the film is brought into contact with a suspension of powder or dry powder after being hardened, a positive pattern of powder is obtained by the development with water.

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