Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kug-Hwan Kim0
Woo-Hee Kim0
Jong-Ho Lee0
Nae-In Lee0
Date of Patent
May 2, 2017
Patent Application Number
15154032
Date Filed
May 13, 2016
Patent Citations Received
Patent Primary Examiner
Patent abstract
Semiconductor devices are provided. A semiconductor device includes a substrate including first through fourth areas. Moreover, first through fourth gate insulating layers are on the first through fourth areas, respectively. Amounts of work function control materials in the first through fourth gate insulating layers, nitrogen concentrations in the first through fourth gate insulating layers, and/or thicknesses of the first through fourth gate insulating layers vary among the first through fourth gate insulating layers. Methods for fabricating semiconductor devices are also provided.
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