Patent ID: 9257353
Filing Date: 2016-02-09
CPC Classification: H01L

Claim Text:
1. An integrated circuit comprising an active circuit portion comprising a plurality of active semiconductor devices and a test circuit portion, separated from the active circuit portion, comprising a test circuit structure comprising a transistor and a bi-directional protection diode structure, wherein the bi-directional protection diode structure comprises: a semiconductor substrate, and within the semiconductor substrate, a first well region having a first conductivity type and a second well region that is adjacent to the first well region and that has a second conductivity type; a first raised structure disposed over and adjacent to the first well region and comprising a first p-n junction diode, a second raised structure disposed over and adjacent to the second well region and having the second conductivity type, and a third raised structure disposed over and adjacent to the second well region and comprising a second p-n junction diode; and a first conductive connection line that electrically connects the first raised structure to the second raised structure and a second conductive connection line that electrically connects the third raised structure to a gate of the transistor.