Compositions – Reductive bleachant – deoxidant – reductant – or generative – Hydride containing
Patent
1997-03-12
1998-04-07
Anthony, Joseph D.
Compositions
Reductive bleachant, deoxidant, reductant, or generative
Hydride containing
2521881, 427 98, 427437, 4274431, C01B 610, C09K 1502
Patent
active
057360650
ABSTRACT:
A chemical reducing solution obtained by using an alkali boron hydride as a reductant and adding thereto a water-soluble, polyoxyethylene chain-containing organic compound having a molecular weight of 200 or above molecule as an additive has merits in that it can reduce copper oxide to metallic copper while maintaining the needle-like form of copper oxide as completely as possible and the reduction can be completed in a short period of time by a simple procedure, so that the chemical reducing solution is successfully usable in a process for producing a multi-layer printed circuit board.
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Kaneko Youichi
Nakaso Akishi
Anthony Joseph D.
Hitachi Chemical Company Ltd.
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