Patent ID: 9245945
Filing Date: 2016-01-26
CPC Classification: H01L

Claim Text:
1. A semiconductor device having a weak current channel, comprising: a substrate; a first conductive type well on the substrate, wherein a source, a second conductive type well, and a drain are formed in the first conductive type well; a plurality of insulation layers and a plurality of first conductive type lightly doped regions, alternatingly arranged along a first direction on or above the second conductive type well, each of the insulation layers including a first end relatively closer to the source and a second end relatively closer to the drain along a second direction, and each of the first conductive type lightly doped regions including a first end relatively closer to the source and a second end relatively closer to the drain along the second direction, wherein the first direction and the second direction intersect with each other; and a gate, relatively closer to the first ends of the insulation layers than the second ends of the insulation layers, a portion of the gate being on a gate oxide above the first conductive type well, and another portion of the gate being on the insulation layers; wherein each of the first conductive type lightly doped regions provides a weak current channel between the source and the drain.