TREATMENT METHOD AFTER PLATING WITH Sn OR Sn ALLOY
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United States of America Patent
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Issued Date -
Feb 15, 2024
app pub date -
Nov 22, 2021
filing date -
Dec 24, 2020
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Abstract
A treatment method is for preventing compound contaminations derived from Sn or an Sn alloy, which have precipitated on members, such as a substrate and a conveyance tool, from accumulating after plating with Sn or the Sn alloy. The method includes washing at least one of the members used in a series of plating treatment steps with an acidic solution immediately after the plating with Sn or the Sn alloy. The acidic solution contains at least one acid or salt thereof having a pH of 5 or lower.
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