ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,453, issued on April 22, was assigned to 3S Silicon Tech Inc. (Hsinchu County, Taiwan).
"Processing method of formic acid soldering" was invented by Kuo-Liang Yeh (Hsinchu County, Taiwan), Jung-Kuei Peng (Hsinchu County, Taiwan), Ya Ju Chang (Hsinchu County, Taiwan) and Wen-Ting Huang (Hsinchu County, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A processing method of formic acid soldering includes providing a solder, performing a formic acid providing step, performing a soldering step and performing a cooling step. The solder is disposed at a soldering object. In the formic acid providing step, a water-containing formic acid vapor extracted...