Patent ID: 11950423
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 17:
18. The semiconductor device of claim 10, wherein the at least one recess channel transistor has an operation voltage greater than respective operation voltages of the plurality of planar channel transistors,
the first recess channel transistor has a first operation voltage and comprises the first source/drain region including a first impurity region and a second impurity region, the first impurity region having the first depth and a first dopant concentration, and the second impurity region having a second dopant concentration greater than the first dopant concentration, and
the second recess channel transistor has a second operation voltage greater than the first operation voltage and comprises the second source/drain region including a third impurity region and a fourth impurity region, the third impurity region having the second depth and a third dopant concentration, and the fourth impurity region having a fourth dopant concentration greater than the third dopant concentration.