Taiwan Semiconductor Manufacturing Comp. Ltd.

University of California

Hsiang-Pi Chang

Chung-Liang Cheng

Huang-Lin Chao

I-Ming Chang

Yao-Sheng Huang

Ziwei Fang

Teng-Chun Tsai

Kuo-Yin Lin

Zi-Wei Fang

Yu-Wei Lu

Chih-Yu Chang

Hung-Chang Sun

Tzer-Min Shen

Yen-Tien Tung

Wan-Chun Pan

Fang-Wei Lee

Chi-Yuan Chen

Kuo-Cheng Ching

Yen-Yu Chen

Shi Ning Ju

Jung-Hung Chang

Hongfa Luan

Chih-I Peng

Cary Chia-Chiung Lo

Dawei Heh

I-ming Chang

Chih-Hao Wang

Chi On Chui

Weng Chang

Hsin-Yi Lee

Wei-Hao Wu

Lung-Kun Chu

Wilman Tsai

Chansyun David Yang

Andrew C Kummel

Hsueh Wen Tsau

Kun-Yu Lee

Chun-I Wu

Chih-Yuan Yang

Hsueh-Wen Tsau

Kun-Tai Wu

Pinyen Lin

Kasra Sardashti

Yu-Chia Liang

Hong-Fa Luan

Iljo Kwak

Maximillian Clemons

Scott Ueda

Mahmut Kavrik

Chi-Yuan Chang

Shen-Yang Lee

A method for tuning a threshold voltage of a transistor is disclosed. A channel layer is formed over a substrate. An interfacial layer is formed over and surrounds the channel layer. A gate dielectric layer is formed over and surrounds the interfacial layer. A dipole layer is formed over and wraps around the gate dielectric layer by performing a cyclic deposition etch process, and the dipole layer includes dipole metal elements and has a substantially uniform thickness. A thermal drive-in process is performed to drive the dipole metal elements in the dipole layer into the gate dielectric layer to form an interfacial dipole surface, and then the dipole layer is removed.

Transistor and semiconductor device with multiple threshold voltages and fabrication method thereof

A semiconductor device includes a substrate, an interfacial layer formed on the semiconductor substrate, and a high-k dielectric layer formed on the interfacial layer. At least one of the high-k dielectric layer and the interfacial layer is doped with: a first dopant species, a second dopant species, and a third dopant species. The first dopant species and the second dopant species form a plurality of first dipole elements having a first polarity. The third dopant species forms a plurality of second dipole elements having a second polarity. A first concentration ratio of the first concentration of the first dopant species to the second concentration of the second dopant species of the p-type transistor is different from a second concentration ratio of the first concentration of the first dopant species to the second concentration of the second dopant species of the n-type transistor.

Dipoles in semiconductor devices

A semiconductor device includes a channel layer, an interfacial layer, a gate dielectric layer, a gate electrode, dipole elements, and additional elements. The interfacial layer is disposed on the channel layer, and includes an insulating material. The gate dielectric layer is disposed over the interfacial layer such that the channel layer is separated from the gate dielectric layer by the interfacial layer. The gate electrode is disposed on the gate dielectric layer. The dipole elements are present in at least one of the interfacial layer and the gate dielectric layer in a predetermined amount such that the semiconductor device has a predetermined threshold voltage. The additional elements are located at a region where the dipole elements are present so as to reduce interfacial defects caused by the dipole elements. The additional elements are different from the dipole elements. Methods for manufacturing the semiconductor device are also disclosed.

Semiconductor device with tunable threshold voltage and method for manufacturing the same

A semiconductor device with different configurations of gate structures and a method of fabricating the same are disclosed. The method includes forming a fin structure on a substrate, forming a gate opening on the fin structure, forming an interfacial oxide layer on the fin structure, forming a first dielectric layer over the interfacial oxide layer, forming a dipole layer between the interfacial oxide layer and the first dielectric layer, forming a second dielectric layer on the first dielectric layer, forming a work function metal (WFM) layer on the second dielectric layer, and forming a gate metal fill layer on the WFM layer. The dipole layer includes ions of first and second metals that are different from each other. The first and second metals have electronegativity values greater than an electronegativity value of a metal or a semiconductor of the first dielectric layer.

Gate structures in semiconductor devices

A semiconductor structure includes a first fin structure and a second fin structure, a first dielectric layer disposed over the first fin structure, a second dielectric layer disposed over the second fin structure, a first gate electrode disposed over the first dielectric layer, and a second gate electrode disposed over the second dielectric layer. A thickness of the first dielectric layer and a thickness of the second dielectric layer are equal. The second fin structure includes an outer region and an inner region, and a Ge concentration in the outer portion is less than Ge concentration in the inner portion.

Semiconductor structure

A semiconductor device structure is provided. The semiconductor device structure includes a source/drain epitaxial feature disposed over a substrate, a plurality of semiconductor layers disposed parallelly to each other and in contact with the source/drain epitaxial feature, a gate electrode layer surrounding a portion of each of the plurality of semiconductor layers, and a dielectric region in the substrate below the source/drain epitaxial feature. The dielectric region includes a first oxidation region having a first dopant, and a second oxidation region having a second dopant different than the first dopant.

Semiconductor device structure including dielectric region with plurality of different oxidation regions

A method includes removing a first dummy gate stack and a second dummy gate stack to form a first trench and a second trench. The first dummy gate stack and the second dummy gate stack are in a first device region and a second device region, respectively. The method further includes depositing a first gate dielectric layer and a second gate dielectric layer extending into the first trench and the second trench, respectively, forming a fluorine-containing layer comprising a first portion over the first gate dielectric layer, and a second portion over the second gate dielectric layer, removing the second portion, performing an annealing process to diffuse fluorine in the first portion into the first gate dielectric layer, and at a time after the annealing process, forming a first work-function layer and a second work-function layer over the first gate dielectric layer and the second gate dielectric layer, respectively.

Gate structure in semiconductor device and method of forming the same

A semiconductor device includes a silicon germanium channel, a germanium-free interfacial layer, a high-k dielectric layer, and a metal gate electrode. The silicon germanium channel is over a substrate. The germanium-free interfacial layer is over the silicon germanium channel. The germanium-free interfacial layer is nitridated. The high-k dielectric layer is over the germanium-free interfacial layer. The metal gate electrode is over the high-k dielectric layer.

Semiconductor device with treated interfacial layer on silicon germanium

A semiconductor device structure is provided. The semiconductor device structure includes a first source/drain epitaxial feature formed over a substrate, a second source/drain epitaxial feature formed over the substrate, two or more semiconductor layers disposed between the first source/drain epitaxial feature and the second source/drain epitaxial feature, a gate electrode layer surrounding a portion of one of the two or more semiconductor layers, a first dielectric region disposed in the substrate and in contact with a first side of the first source/drain epitaxial feature, and a second dielectric region disposed in the substrate and in contact with a first side of the second source/drain epitaxial feature, the second dielectric region being separated from the first dielectric region by a substrate.

Semiconductor device structure and methods of forming the same

A semiconductor device with different configurations of gate structures and a method of fabricating the same are disclosed. The method includes forming a fin structure on a substrate, forming a gate opening on the fin structure, forming a metallic oxide layer within the gate opening, forming a first dielectric layer on the metallic oxide layer, forming a second dielectric layer on the first dielectric layer, forming a work function metal (WFM) layer on the second dielectric layer, and forming a gate metal fill layer on the WFM layer. The forming the first dielectric layer includes depositing an oxide material with an oxygen areal density less than an oxygen areal density of the metallic oxide layer.

A semiconductor device includes a semiconductor substrate, an interfacial layer formed on the semiconductor substrate, a high-k dielectric layer formed on the interfacial layer, and a conductive gate electrode layer formed on the high-k dielectric layer. At least one of the high-k dielectric layer and the interfacial layer is doped with: a first dopant species, a second dopant species, and a third dopant species. The first dopant species and the second dopant species form a plurality of first dipole elements having a first polarity. The third dopant species forms a plurality of second dipole elements having a second polarity, and the first and second polarities are opposite.

A semiconductor structure includes a substrate including a first region and a second region, a first channel layer disposed in the first region and a second channel layer disposed in the second region, a first dielectric layer disposed on the first channel layer and a second dielectric layer disposed on the second channel layer, and a first gate electrode disposed on the first dielectric layer and a second gate electrode disposed on the second dielectric layer. The first channel layer in the first region includes Ge compound of a first Ge concentration, the second channel layer in the second region includes Ge compound of a second Ge concentration. The first Ge concentration in the first channel layer is greater than the second Ge concentration in the second channel layer.

An integrated circuit device is provided that includes a first fin structure and a second fin structure extending from a substrate. The first fin structure is a first composition, and includes rounded corners. The second fin structure is a second composition, different than the first composition. A first interface layer is formed directly on the first fin structure including the rounded corners and a second interface layer directly on the second fin structure. The first interface layer is an oxide of the first composition and the second interface layer is an oxide of the second composition. A gate dielectric layer is formed over the first interface layer and the second interface layer.

Semiconductor device including interface layer and method of fabricating thereof

A method includes following steps. A silicon germanium layer is formed on a substrate. A surface layer of the silicon germanium layer is oxidized to form an interfacial layer comprising silicon oxide and germanium oxide. The interfacial layer is nitridated. A metal gate structure is formed over the nitridated interfacial layer.

Growing community of inventors

Taipei, Taiwan

Hsiang-Pi Chang