Patent ID: 9299622
Filing Date: 2016-03-29
CPC Classification: H01L

Claim Text:
1. A method for making a device for monitoring charging effects, the method comprising: providing a semiconductor substrate having a surface region; forming a gate dielectric layer overlying a first portion and a second portion of the surface region of the semiconductor substrate; performing an implant to adjust a threshold voltage in the second portion of the surface of the semiconductor substrate; forming a polysilicon material overlying the first and second portions; patterning the polysilicon material to form a first gate and a second gate, the first gate being over the first portion and the second gate being over the second portion; forming first, second, and third doped regions in the semiconductor substrate using the first and second gates as a protective mask; wherein the second doped region has the first gate on one side and the second gate on the other side; forming an interlayer dielectric layer over the second gate; and forming a conductive layer over the interlayer dielectric layer, the conductive layer being electrically coupled to the second gate and configured to collect charges; wherein the second doped region is interposed between the first and the third doped regions, the second doped region is coupled to the first doped region through the first portion of the substrate, and the second doped region is coupled to the third doped region through the second portion of the substrate; and wherein the second doped region has a positive electric charge on a side to the first gate and a negative electric charge on an opposite side.