FULL SILICIDATION PREVENTION VIA DUAL NICKEL DEPOSITION APPROACH
摘要:
Semiconductor devices are formed without full silicidation of the gates and with independent adjustment of silicides in the gates and source/drain regions. Embodiments include forming a gate on a substrate, forming a nitride cap on the gate, forming a source/drain region on each side of the gate, forming a first silicide in each source/drain region, removing the nitride cap subsequent to the formation of the first silicide, and forming a second silicide in the source/drain regions and in the gate, subsequent to removing the nitride cap. Embodiments include forming the first silicide by forming a first metal layer on the source/drain regions and performing a first RTA, and forming the second silicide by forming a second metal layer on the source/drain regions and on the gate and performing a second RTA.
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