Patent ID: 9129809
Filing Date: 2015-09-08
Classification: H01L

Abstract:
1. A silicon-controlled rectifier (SCR), comprising: an anode region comprising a plurality of linear or t-shaped p-type anode wells extending in parallel with one another in a first direction and spaced apart from one another in a second direction, wherein a p-type anode well has a length in the first direction and a width in the second direction; wherein the length of the p-type anode well is greater than the width of the p-type anode well; an n-type well region laterally surrounding the plurality of p-type anode wells; a p-type well region that directly meets the n-type well region at junction, wherein the pn junction extends between the p-type and n-type well regions in the second direction; a cathode region comprising a plurality of n-type cathode wells arranged within the p-type well region, wherein an n-type cathode well has a length in the first direction and a width in the second direction; wherein the length of the n-type cathode well is greater than the width of the n-type cathode well.