Patent ID: 11901414
Assignee: NXP B.V.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device comprising:
a semiconductor substrate;
a first semiconductor region of a first semiconductor type, formed within the semiconductor substrate, wherein the first semiconductor region includes a first doped region formed in a lower portion of the first semiconductor region and a second doped region formed over the first doped region in an upper portion of the first semiconductor region, and a defect layer having an upper surface formed in an upper portion of the first doped region, wherein the first doped region has a dopant concentration higher than a dopant concentration of the second doped region;
a second semiconductor region of a second semiconductor type formed over the first semiconductor region; and
a fourth semiconductor region formed below the second semiconductor region and between the first doped region, the second doped region, and an isolation region sidewall formed laterally adjacent the first doped region and the second doped region, wherein the fourth semiconductor region includes a doping level below a doping level of the second doped region.