Patent ID: 9231080
Filing Date: 2016-01-05
CPC Classification: H01L

Claim Text:
1. A replacement metal gate process comprising: forming at least one fin on a semiconductor substrate; forming a dummy gate structure on the at least one fin; forming a spacer on a first side and a second side of the dummy gate structure, the spacers being perpendicular to the at least one fin; removing the dummy gate structure to leave an opening between the spacers that is to be filled with a permanent gate structure; depositing a high dielectric constant (high-k) dielectric material in the opening and over the at least one fin; depositing a work function metal in the opening and over the at least one fin so as to be in contact with the high-k dielectric material, the high k dielectric material and the work function metal only partially filling the opening; filling a remainder of the opening with an organic material; etching the organic material until it is partially removed from the opening but still covering the work function metal on the at least one fin; etching the work function metal until it is at a same level as the organic material; removing the organic material; and filling the opening with a metal until the opening is completely filled.