Patent ID: 9324849
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. An electronic system including at least a switch device built on a semiconductor body, the switch device comprising: at least four regions in a portion of the semiconductor body, the first and the third regions being implanted with a first type of dopant, the second the fourth regions being implanted with a second type of dopant, and the regions being adjacent are separated by spaces; and a silicide block layer (SBL) covering the spaces and overlapping into both implant regions to construct P/N junctions between the first/second and second/third regions, wherein the first and third implant regions are conductive when a sufficiently high voltage is applied between the first and third implant regions, wherein the first, fourth, and third regions are served as the anode, cathode, and gate of a first Silicon-Controlled Rectifier (SCR), wherein the switch device further comprises a second SCR built on the semiconductor body having the opposite type of implants as in the first, second, third and fourth regions of the first SCR; and wherein the first, fourth, and third regions of the first and second SCRs are coupled, respectively, to serve as the first, second and gate terminals of a TRIAC, respectively.