Open AccessAlkaline replenisher evaluation for printed wiring board evaluation
Author(s) -
D.R. Tucker,
S.E. Goldammer
Publication year - 1997
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/481586
Subject(s) - aqueous solution , ammonium chloride , alkalinity , chloride , chemistry , materials science , nuclear chemistry , organic chemistry
MacDermid`s Metex{reg_sign} Ultra Etch FL and modifications to the Ultra Etch FL chemistry were evaluated as replacements of a discontinued replenisher, Ultra Etch Aqueous. Ultra Etch FL with additions of water to lower the total alkalinity and ammonium chloride to maintain the chloride level was found to produce acceptable results and, in fact, had a similar chemical composition to Ultra Etch Aqueous
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