Taiwan Semiconductor Manufacturing Comp. Ltd.

Fong-Yu Yen

Hun-Jan Tao

Peng-Fu Hsu

Jin Ying

Huan-Just Lin

Cheng-Lung Hung

Yi-Shien Mor

Vencent Chang

Yong-Tian Hou

Ying Jin

Kuo-Tai Huang

Peng-Soon Lim

Vincent Chang

Kang-Cheng Lin

Donald Y Chao

Albert Chin

Ping-Fang Hung

A semiconductor device is disclosed that includes: a substrate; a first dielectric layer formed over the substrate and formed of a first high-k material, the first high-k material selected from the group consisting of HfO, HfSiO, HfSiON, HfTaO, HfTiO, HfTiTaO, HfAlON, and HfZrO; a second dielectric layer formed over the first dielectric layer and formed of a second high-k material, the second high-k material being different than the first high-k material and selected from the group consisting of HfO, HfSiO, HfSiON, HfTaO, HfTiO, HfTiTaO, HfAlON, and HfZrO; and a metal gate formed over the second dielectric layer. The first dielectric layer includes ions selected from the group consisting of N, O, and Si.

Semiconductor devices and methods with bilayer dielectrics

A semiconductor structure includes a refractory metal silicide layer; a silicon-rich refractory metal silicide layer on the refractory metal silicide layer; and a metal-rich refractory metal silicide layer on the silicon-rich refractory metal silicide layer. The refractory metal silicide layer, the silicon-rich refractory metal silicide layer and the metal-rich refractory metal silicide layer include same refractory metals. The semiconductor structure forms a portion of a gate electrode of a metal-oxide-semiconductor device.

Metal gates of PMOS devices having high work functions

Semiconductor devices with dual-metal gate structures and fabrication methods thereof. A semiconductor substrate with a first doped region and a second doped region separated by an insulation layer is provided. A first metal gate stack is formed on the first doped region, and a second metal gate stack is formed on the second doped region. A sealing layer is disposed on sidewalls of the first gate stack and the second gate stack. The first metal gate stack comprises an interfacial layer, a high-k dielectric layer on the interfacial layer, a first metal layer on the high-k dielectric layer, a metal insertion layer on the first metal layer, a second metal layer on the metal insertion layer, and a polysilicon layer on the second metal layer. The second metal gate stack comprises an interfacial layer, a high-k dielectric layer on the interfacial layer, a second metal layer on the high-k dielectric layer, and a polysilicon layer on the second metal layer.

Semiconductor devices with dual-metal gate structures and fabrication methods thereof

A semiconductor structure having a high-k dielectric and its method of manufacture is provided. A method includes forming a first dielectric layer over the substrate, a metal layer over the first dielectric layer, and a second dielectric layer over the metal layer. A method further includes annealing the substrate in an oxidizing ambient until the three layers form a homogenous high-k dielectric layer. Forming the first and second dielectric layers comprises a non-plasma deposition process such atomic layer deposition (ALD), or chemical vapor deposition (CVD). A semiconductor device having a high-k dielectric comprises an amorphous high-k dielectric layer, wherein the amorphous high-k dielectric layer comprises a first oxidized metal and a second oxidized metal. The atomic ratios of all oxidized metals are substantially uniformly within the amorphous high-k dielectric layer.

Multi-metal-oxide high-K gate dielectrics

A semiconductor device is disclosed that includes: a substrate; a first high-k dielectric layer; a second high-k dielectric layer formed of a different high-k material; and a metal gate. In another form, a method of forming a semiconductor device is disclosed that includes: providing a substrate; forming a first high-k dielectric layer above the substrate; forming a second dielectric layer of a different high-k material above the first dielectric layer; and forming a gate structure above the second dielectric layer. In yet another form, a method of forming a semiconductor device is disclosed that includes: providing a substrate; forming an interfacial layer above the substrate; forming a first high-k dielectric layer above the interfacial layer; performing a nitridation technique; performing an anneal; forming a second high-k dielectric layer of a different high-k material above the first dielectric layer; and forming a metal gate structure above the second dielectric layer.

Growing community of inventors

Taoyuan County, Taiwan

Fong-Yu Yen