ALEXANDRIA, Va., June 9 -- United States Patent no. 12,288,980, issued on April 29, was assigned to POLYTRONICS TECHNOLOGY CORP. (Hsinchu, Taiwan).
"Over-current protection device" was invented by Yi-Hsuan Lee (Taichung, Taiwan), Pin Hsuan Li (Hsinchu, Taiwan) and Yi-An Sha (Xindian, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An over-current protection device includes a resistor element, an outer electrode, and an encapsulation layer. The resistor element has a first insulation layer, a first electrically conductive layer, a PTC material layer, a second electrically conductive layer and a second insulation layer stacked sequentially from bottom to top. The first insulation layer has a bottom surfa...