Flux and solder paste
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Feb 27, 2015
filing date -
Mar 25, 2014
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Abstract
Provided is a flux which can remove metal oxides to improve solder wettability and can fix the object to be soldered with flux residue. The flux contains thermosetting resin, and long-chain dibasic acid mixture including one or more species of first long-chain dibasic acid having an alkyl group in a side chain, the first long-chain dibasic acid being added as a hardening agent for hardening the thermosetting resin and an activator, and second long-chain dibasic acid having an alkyl group and an alkoxycarbonyl group in a side chain and having carbon number of 8 or more in a main chain between the carboxyl groups at opposite terminals. It is preferable that content of the thermosetting resin is 30% through 70% and content of the long-chain dibasic acid mixture is 20% through 60%.
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