ALLOY SOLDER AND ALLOY SOLDER MANUFACTURING METHOD
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United States of America Patent
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Issued Date -
Nov 25, 2010
app pub date -
Dec 11, 2008
filing date -
Dec 12, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention solves the problem of the bonding strength of a Pb-free alloy solder being inferior to that of the conventional Pb-containing alloy solder and provides a Pb-free alloy solder satisfactory in bonding reliability.An alloy solder is manufactured by adding a predetermined amount of carbon to a Pb-free solder in a high-temperature atmosphere of a temperature in the range of 800° C. to 1200° C. An alloy solder manufacturing method includes a melting process for melting a Pb-free solder by heating the Pb-free solder in a high-temperature atmosphere of a temperature in the range of 800° C. to 1200° C., a carburizing process for carburizing the molten Pb-free solder held in the high-temperature atmosphere by adding a predetermined amount of carbon to the molten Pb-free solder, a stirring process for stirring a mixture of the molten Pb-free solder and carbon, and a cooling process for cooling the mixture of the Pb-free solder and carbon stirred by the stirring process and poured into a mold to solidify the mixture.
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