Taiwan Semiconductor Manufacturing Comp. Ltd.

Feng-Ching Chu

Wei-Yang Lee

Feng-Cheng Yang

Yen-Ming Chen

Chia-Pin Lin

Chung-Te Lin

Chieh-Fang Chen

Chung-Chi Wen

Katherine H Chiang

Wei-Yuan Lu

Chien-Chih Lin

Tzu-Ching Lin

Yu-Ming Lin

Meng-Han Lin

Han-Jong Chia

Chii-Horng Li

Sheng-Chen Wang

Li-Li Su

Tuoh Bin Ng

Chieh-Yi Shen

Chih-Hsuan Cheng

Semiconductor device and the manufacturing method thereof are disclosed. An exemplary method of manufacture comprises receiving a substrate including a semiconductor material stack formed thereon, wherein the semiconductor material stack includes a first semiconductor layer of a first semiconductor material and second semiconductor layer of a second semiconductor material that is different than the first semiconductor material. Patterning the semiconductor material stack to form a trench. The patterning includes performing a first etch process with a first etchant for a first duration and then performing a second etch process with a second etchant for a second duration, where the second etchant is different from the first etchant and the second duration is greater than the first duration. The first etch process and the second etch process are repeated a number of times. Then epitaxially growing a third semiconductor layer of the first semiconductor material on a sidewall of the trench.

Semiconductor device active region profile and method of forming the same

A semiconductor structure includes an isolation structure; first and second source/drain (S/D) features over the isolation structure, defining a first direction from the first S/D feature to the second S/D feature from a top view; one or more channel layers connecting the first and the second S/D features; a gate structure between the first and the second S/D features and engaging each of the one or more channel layers; and a via structure under the first S/D feature and electrically connecting to the first S/D feature. In a cross-sectional view perpendicular to the first direction, the via structure has a profile that widens and then narrows along a bottom-up direction.

Epitaxial source/drain feature with enlarged lower section interfacing with backside via

A method for forming a semiconductor memory structure is provided. The method includes forming a stack over a substrate, and the stack includes first dielectric layers and second dielectric layers vertically alternately arranged. The method also includes forming first dielectric pillars through the stack, and etching the stack to form first trenches. Sidewalls of the first dielectric pillars are exposed from the first trenches. The method also includes removing the first dielectric pillars to form through holes, removing the second dielectric layers of the stack to form gaps between the first dielectric layers, and forming first conductive lines in the gaps.

Method for forming a 3-D semiconductor memory structure comprising horizontal and vertical conductive lines

A semiconductor device structure is provided. The semiconductor device structure includes a stack of channel structures and a first epitaxial structure and a second epitaxial structure adjacent to opposite sides of the channel structures. The semiconductor device structure also includes a gate stack wrapped around the channel structures and a backside conductive contact connected to the second epitaxial structure. The second epitaxial structure is between a top of the backside conductive contact and a top of the gate stack. The semiconductor device structure further includes an etch stop layer extending along a sidewall of the backside conductive contact and a bottom of the gate stack.

Semiconductor device structure with backside contact

A method for fabricating a semiconductor device that includes a merged source/drain feature extending between two adjacent fin structures is provided. An air gap is formed under the merged source/drain feature. Forming the epitaxial feature includes growing a first epitaxial feature having a first portion over the first fin structure and a second portion over the second fin structure, growing a second epitaxial feature over the first and second portions of the first epitaxial feature, and growing a third epitaxial feature over the second epitaxial feature. The second epitaxial feature includes a merged portion between the first fin structure and the second fin structure.

Semiconductor device with phosphorus-doped epitaxial features

A method of manufacturing an integrated circuit (IC) includes providing a structure having a fin over a substrate in a region of the IC, a sacrificial gate stack engaging a channel region of the fin, and gate spacers on sidewalls of the sacrificial gate stack. The first layers and the second layers are alternately stacked over the substrate. The method also includes etching the fin adjacent the gate spacers, resulting in source/drain trenches, partially recessing the second layers exposed in the source/drain trenches, resulting in gaps between adjacent layers of the first layers in the fin, depositing inner spacer features in the gaps in the fin, epitaxially growing source/drain features in the source/drain trenches, and replacing the sacrificial gate stack with a metal gate stack. The metal gate stack includes a gate dielectric layer disposed over top and sidewalls of the fin having both the first and the second layers.

Semiconductor structure with gate-all-around devices and stacked FinFET devices

A semiconductor device includes a fin stack, a gate structure on the fin stack, a source region on a first side of the gate structure, a drain region on a second side of the gate structure opposite the first side, and a source contact extending to and connecting the source region. The source region and the drain region are asymmetric.

Asymmetric source/drain for backside source contact

Various examples of an integrated circuit device and a method for forming the device are disclosed herein. In an example, a method includes receiving a workpiece that includes a substrate, and a device fin extending above the substrate. The device fin includes a channel region. A portion of the device fin adjacent the channel region is etched, and the etching creates a source/drain recess and forms a dielectric barrier within the source/drain recess. The workpiece is cleaned such that a bottommost portion of the dielectric barrier remains within a bottommost portion of the source/drain recess. A source/drain feature is formed within the source/drain recess such that the bottommost portion of the dielectric barrier is disposed between the source/drain feature and a remainder of the device fin.

Integrated circuit device with source/drain barrier

The present disclosure provides a semiconductor device and a method of forming the same. A semiconductor device according one embodiment of the present disclosure include a plurality of channel members disposed over a substrate, a plurality of inner spacer features interleaving the plurality of channel members, a gate structure wrapping around each of the plurality of channel members, and a source/drain feature. The source/drain feature includes a first epitaxial layer in contact with the substrate and the plurality of channel members, and a second epitaxial layer in contact with the first epitaxial layer and the plurality of inner spacer features. The first epitaxial layer and the second epitaxial layer include silicon germanium. A germanium content of the second epitaxial layer is greater than a germanium content of the first epitaxial layer.

Semiconductor device including source/drain feature with multiple epitaxial layers

According to one example, a method includes performing a first etching process on a fin stack to form a first recess and a second recess at a first depth, the first recess and the second recess on opposite sides of a gate structure that is on the fin stack. The method further includes depositing inner spacers within the first recess and the second recess. The method further includes, after depositing the inner spacers, performing a second etching process to extend a depth of the first recess to a second depth. The method further includes forming a dummy contact region within the first recess, forming a source structure within the first recess on the dummy contact region, and forming a drain structure within the second recess.

The present disclosure provides a semiconductor structure and a method for forming a semiconductor structure. The semiconductor structure includes a substrate, and a dielectric stack over the substrate. The dielectric stack includes a first layer over the substrate and a second layer over the first layer. The semiconductor structure further includes a gate layer including a first portion traversing the second layer and a second portion extending between the first layer and the second layer.

Memory device and manufacturing method thereof

A device includes a substrate, an isolation structure over the substrate, and two fins extending from the substrate and above the isolation structure. Two source/drain structures are over the two fins respectively and being side by side along a first direction generally perpendicular to a lengthwise direction of the two fins from a top view. Each of the two source/drain structures has a near-vertical side, the two near-vertical sides facing each other along the first direction. A contact etch stop layer (CESL) is disposed on at least a lower portion of the near-vertical side of each of the two source/drain structures. And two contacts are disposed over the two source/drain structures, respectively, and over the CESL.

Cut EPI process and structures

A semiconductor device structure is provided. The semiconductor device structure includes a first fin structure extended above a substrate along a first direction, and a first gate structure formed over the first fin structure along a second direction. The semiconductor device structure includes a first source/drain (S/D) structure formed over the first fin structure and adjacent to the first gate structure, and a cap layer formed on and in direct contact with the first S/D structure. The semiconductor device structure includes an isolation structure formed adjacent to the first gate structure and the first S/D structure along the first direction, and a bottom surface of the isolation structure is lower than a bottom surface of the first gate structure and a bottom surface of the first S/D structure.

Semiconductor device structure with cap layer

A method of fabricating a fin-like field effect transistor (FinFET) device includes providing a semiconductor substrate having a region for forming p-type metal-oxide-semiconductor (PMOS) devices and a region for forming n-type metal-oxide-semiconductor (PMOS) devices, forming fin structures in both regions of the substrate separated by isolation features, first forming source/drain (S/D) features in the PMOS region, and subsequently forming S/D features in the NMOS region. First forming the PMOS S/D features and then forming the NMOS S/D features results in a greater extent of loss of isolation features in the PMOS region than in the NMOS region.

Growing community of inventors

Hsinchu, Taiwan

Feng-Ching Chu