Alkali development-type solder resist, cured product...

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making

Reexamination Certificate

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C430S285100, C430S286100, C430S287100, C430S916000, C430S919000, C430S920000, C430S922000, C430S921000, C430S923000, C430S924000, C430S926000, C430S277100, C430S018000, C430S311000, C430S032000, C430S330000, C522S026000, C522S027000, C522S028000, C522S033000, C522S053000, C522S050000, C522S057000, C522S063000, C522S065000, C522S103000, C522S913000

Reexamination Certificate

active

08048613

ABSTRACT:
An alkali development-type solder resist includes (A) a carboxyl group-containing photosensitive resin obtained by reacting (a) a compound having two or more cyclic ether or thioether groups in the molecule with (b) an unsaturated monocarboxylic acid, reacting the product with (c) a polybasic acid anhydride, reacting the resulting resin with (d) a compound having a cyclic ether group and an ethylenic unsaturated group in the molecule, and reacting the product additionally with (c) a polybasic acid anhydride, (B) an oxime ester-based photopolymerization initiator containing a specific oxime ester group, (C) a compound having two or more ethylenic unsaturated groups in the molecule, and (D) a thermosetting component, wherein the dry film obtained by applying the composition has an absorbance of 0.3 to 1.2 per 25 μm of the film thickness at a wavelength of 350 to 375 nm.

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