Process for producing negative copies by means of a material based on 1,2-quinone diazides with 4-ester or amide substitution

US4576901A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Paul Stahlhofen · Wiesbaden, DE
• Gerhard Mack · Bad Rodach, DE

Key dates

• Filing date: Jul 2, 1984
• Grant date: Mar 18, 1986
• Expiry date: Jul 2, 2004

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/2022
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A process for producing negative relief copies is disclosed in which a light-sensitive material, consisting essentially of (1) a binder which is insoluble in water and soluble in aqueous-alkaline solutions and (2) a light-sensitive ester or amide of a 1,2-benzoquinone-2-diazide-4-sulfonic acid, a 1,2-benzoquinone-2-diazide-4-carboxylic acid, a 1,2-naphthoquinone-2-diazide-4-sulfonic acid, or a 1,2-naphthoquinone-2-diazide-4-carboxylic acid, is imagewise exposed, thereafter heated and, after cooling, exposed again without an original, and subsequently developed by means of an aqueous-alkaline developer. The disclosed process permits the production of negative copies with the aid of a material which yields positive copies when it is processed in a conventional manner.