Taiwan Semiconductor Manufacturing Comp. Ltd.

Pin Chu Liang

Pei-Ren Jeng

Hung-Yao Chen

A method includes depositing a first dielectric layer over and along sidewalls of a first semiconductor fin and a second semiconductor fin, depositing a second dielectric layer over the first dielectric layer, recessing the first dielectric layer to define a dummy fin between the first semiconductor fin and the second semiconductor fin, forming a cap layer over top surfaces and sidewalls of the first semiconductor fin and the second semiconductor fin, wherein the forming the cap layer comprises depositing the cap layer in a furnace at process temperatures higher than a first temperature, and lowering the temperature of the furnace, wherein during the lowering the temperature of the furnace, the pressure in the furnace is raised to and maintained at 10 torr or higher until the temperature of the furnace drops below the first temperature.

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Changhua, Taiwan

Pin Chu Liang