Method and apparatus for placing a gate contact inside an active region of a semiconductor
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United States of America Patent
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Apr 10, 2018
Issued Date -
N/A
app pub date -
Jul 6, 2016
filing date -
Jul 6, 2016
priority date (Note) -
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Abstract
A method provides a structure having a FinFET in an Rx region, the FinFET including a channel, source/drain (S/D) regions and a gate, the gate including gate metal. A cap is formed over the gate having a liner and a core. Trench silicide (TS) is disposed on sides of the gate. The TS is recessed to a level above a level of the gate and below a level of the core. The liner is etched to the level of the TS. An oxide layer is disposed over the structure. A CB trench is patterned into the oxide layer within the Rx region to expose the core at a shelf portion of the CB trench. The core is etched to extend the CB trench to a bottom at the gate metal. The shelf portion having a larger area than the bottom. The CB trench is metalized to form a CB contact.
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