ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,538,423, issued on Jan. 27, was assigned to LG INNOTEK Co. LTD. (Seoul, South Korea).
"Circuit board" was invented by Byeong Kyun Choi (Seoul, South Korea), Moo Seong Kim (Seoul, South Korea) and Woo Seop Sim (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A circuit board according to an embodiment includes an insulating layer, a first circuit pattern layer disposed on the insulating layer; a second circuit pattern layer disposed below the insulating layer; and a via passing through the insulating layer and connecting the first circuit pattern layer and the second circuit pattern layer, wherein the via has a first width at an upper su...