Patent ID: 9263401
Filing Date: 2016-02-16
CPC Classification: H01L

Claim Text:
1. A semiconductor electrostatic discharge (ESD) protection device comprising; a bulk substrate area; a plurality of field dielectric regions formed over the bulk substrate area; a plurality of active areas formed between adjacent field dielectric regions, wherein at least a part of one of the active areas and at least a part of the bulk substrate area are formed of a material of a first doping type; an upper portion formed in the one of the active areas and formed of a material of a second doping type opposite to the first doping type, the upper portion having a width smaller than a width of the active area, wherein a diode is formed in the active area of the device, the diode comprising at least part of a junction formed between the upper portion of the active area and a remainder of the active area, wherein the upper portion is connected to a first terminal and the remainder of the active area is connected to a second terminal, wherein the remainder of the active area and the bulk substrate area have a doping profile of the first doping type, wherein the doping profile has a first maximum value at a surface of the active area and changes to a minimum value at a first depth within the active area, and wherein the doping profile further changes to a second maximum value at a second depth greater than the first depth and within the bulk substrate area; and a bipolar junction transistor including: