Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first fin-shaped structure on the first region and a second fin-shaped structure on the second region; forming a patterned mask on the second region; and performing a process to enlarge the first fin-shaped structure so that the top surfaces of the first fin-shaped structure and the second fin-shaped structure are different.

Abstract: A method for fabricating semiconductor device includes the steps of: forming a fin-shaped structure on a substrate; forming a first gate structure and a second gate structure on the fin-shaped structure; forming an interlayer dielectric (ILD) layer around the first gate structure and the second gate structure; removing the second gate structure and part of the fin-shaped structure to forma first trench; forming a dielectric layer into the first trench; and planarizing part of the dielectric layer to form a single diffusion break (SDB) structure. Preferably, the top surfaces of the SDB structure and the first gate structure are coplanar.

Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first fin-shaped structure on the first region and a second fin-shaped structure on the second region; forming a first buffer layer on the first fin-shaped structure and the second fin-shaped structure; removing the first buffer layer on the first region; and performing a curing process so that a width of the first fin-shaped structure is different from a width of the second fin-shaped structure.

Abstract: A semiconductor device includes: a substrate having a first region and a second region; a first fin-shaped structure on the first region and a second fin-shaped structure on the second region; a shallow trench isolation (STI) around the first fin-shaped structure and the second fin-shaped structure; a first oxide layer on the first fin-shaped structure; a second oxide layer on and directly contacting the first oxide layer and the STI; and a third oxide layer on the second fin-shaped structure, wherein a thickness of the third oxide layer is less than a thickness of the first oxide layer.

Abstract: A tunnel field effect transistor (TFET) includes: a first gate structure on a substrate; a source region having a first conductive type on one side of the first gate structure; a drain region having a second conductive type on another side of the first gate structure; a first isolation structure adjacent to the source region; and a second isolation structure adjacent to the drain region. Preferably, the first isolation and the second isolation comprise different material and different depths or same material and different depths.

Abstract: A manufacturing method of a semiconductor device includes the following steps. A barrier layer is formed in a first region and a second region of a semiconductor substrate. The barrier layer formed in the first region is thinned before a step of forming a first work function layer on the barrier layer. The first work function layer formed on the first region is then removed. The process of thinning the barrier layer in the first region and the process of removing the first work function layer in the first region are performed separately for ensuring the coverage of the first work function layer in the second region. The electrical performance of the semiconductor device and the uniformity of the electrical performance of the semiconductor device may be improved accordingly.

Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first gate structure on the first region and a second gate structure on the second region; forming a first spacer around the first gate structure; forming a first epitaxial layer adjacent to two sides of the first spacer; forming a buffer layer on the first gate structure; and forming a contact etch stop layer (CESL) on the buffer layer on the first region and the second gate structure on the second region.

Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first fin-shaped structure on the first region and a second fin-shaped structure on the second region; forming a first buffer layer on the first fin-shaped structure and the second fin-shaped structure; removing the first buffer layer on the first region; and performing a curing process so that a width of the first fin-shaped structure is different from a width of the second fin-shaped structure.

Abstract: A tunnel field effect transistor (TFET) includes: a first gate structure on a substrate; a source region having a first conductive type on one side of the first gate structure; a drain region having a second conductive type on another side of the first gate structure; a first isolation structure adjacent to the source region; and a second isolation structure adjacent to the drain region. Preferably, the first isolation and the second isolation comprise different material and different depths or same material and different depths.

Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first gate structure on the first region and a second gate structure on the second region; forming a first spacer around the first gate structure; forming a first epitaxial layer adjacent to two sides of the first spacer; forming a buffer layer on the first gate structure; and forming a contact etch stop layer (CESL) on the buffer layer on the first region and the second gate structure on the second region.

Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first gate structure on the first region and a second gate structure on the second region; forming a first spacer around the first gate structure; forming a first epitaxial layer adjacent to two sides of the first spacer; forming a buffer layer on the first gate structure; and forming a contact etch stop layer (CESL) on the buffer layer on the first region and the second gate structure on the second region.

Abstract: A semiconductor device includes: a substrate having a first region and a second region; a first fin-shaped structure on the first region and a second fin-shaped structure on the second region; a shallow trench isolation (STI) around the first fin-shaped structure and the second fin-shaped structure; a first oxide layer on the first fin-shaped structure; a second oxide layer on and directly contacting the first oxide layer and the STI; and a third oxide layer on the second fin-shaped structure, wherein a thickness of the third oxide layer is less than a thickness of the first oxide layer.

Abstract: A method for fabricating semiconductor device includes the steps of first forming a metal gate on a substrate and a spacer around the metal gate, in which the metal gate comprises a high-k dielectric layer, a work function metal layer, and a low-resistance metal layer. Next, part of the high-k dielectric layer is removed to form an air gap between the work function metal layer and the spacer.

Abstract: A method for fabricating semiconductor device includes the steps of: forming a fin-shaped structure on a substrate; forming a first gate structure and a second gate structure on the fin-shaped structure; forming an interlayer dielectric (ILD) layer around the first gate structure and the second gate structure; removing the second gate structure and part of the fin-shaped structure to forma first trench; forming a dielectric layer into the first trench; and planarizing part of the dielectric layer to form a single diffusion break (SDB) structure. Preferably, the top surfaces of the SDB structure and the first gate structure are coplanar.

Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first fin-shaped structure on the first region and a second fin-shaped structure on the second region; forming a patterned mask on the second region; and performing a process to enlarge the first fin-shaped structure so that the top surfaces of the first fin-shaped structure and the second fin-shaped structure are different.

Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first fin-shaped structure on the first region; forming a shallow trench isolation (STI) around the first fin-shaped structure; forming a first oxide layer on the first fin-shaped structure; and then forming a second oxide layer on the first oxide layer and the STI.

Abstract: A method for fabricating semiconductor device includes the steps of: providing a substrate having a first region and a second region; forming a first fin-shaped structure on the first region; forming a shallow trench isolation (STI) around the first fin-shaped structure; forming a first oxide layer on the first fin-shaped structure; and then forming a second oxide layer on the first oxide layer and the STI.

Abstract: A method for fabricating semiconductor device includes the steps of first forming a metal gate on a substrate and a spacer around the metal gate, in which the metal gate comprises a high-k dielectric layer, a work function metal layer, and a low-resistance metal layer. Next, part of the high-k dielectric layer is removed to form an air gap between the work function metal layer and the spacer.

Abstract: A semiconductor device includes: a fin-shaped structure on a substrate; a single diffusion break (SDB) structure in the fin-shaped structure to divide the fin-shaped structure into a first portion and a second portion; a gate structure on the first portion; and a contact etch stop layer (CESL) adjacent to the gate structure and extending to cover the SDB structure.

Abstract: A manufacturing method of a semiconductor device includes the following steps. A barrier layer is formed in a first region and a second region of a semiconductor substrate. The barrier layer formed in the first region is thinned before a step of forming a first work function layer on the barrier layer. The first work function layer formed on the first region is then removed. The process of thinning the barrier layer in the first region and the process of removing the first work function layer in the first region are performed separately for ensuring the coverage of the first work function layer in the second region. The electrical performance of the semiconductor device and the uniformity of the electrical performance of the semiconductor device may be improved accordingly.