Patent ID: 11923435
Assignee: WINBOND ELECTRONICS CORP.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. The high voltage semiconductor device according to claim 1, further comprising:
a second drift region disposed in the semiconductor substrate, wherein a part of the first drift region and a part of the second drift region are located at two opposite sides of the gate structure in a horizontal direction, respectively;
a second sub gate structure disposed on the second drift region and separated from the gate structure;
a third spacer structure disposed on a sidewall of the second sub gate structure; and
a second insulation structure disposed on the second drift region, wherein at least a part of the second insulation structure is located between the first spacer structure and the third spacer structure, a portion of the second drift region is located between the first spacer structure and the third spacer structure, and the second insulation structure is directly connected with the portion of the second drift region.