Mixed alloy solder paste
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United States of America Patent
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May 2, 2017
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app pub date -
Mar 10, 2015
filing date -
May 3, 2010
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Abstract
A solder paste consists of an amount of a first solder alloy powder between 44 wt % to less than 60 wt %; an amount of a second solder alloy powder between greater than 0 wt % and 48 wt %; and a flux; wherein the first solder alloy powder comprises a first solder alloy that has a solidus temperature above 260° C.; and wherein the second solder alloy powder comprises a second solder alloy that has a solidus temperature that is less than 250° C. In another implementation, the solder paste consists of an amount of a first solder alloy powder between 44 wt % and 87 wt %; an amount of a second solder alloy powder between 13 wt % and 48 wt %; and flux.
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