CMOS device and method of forming the same
First Claim
1. A semiconductor device, comprising:
- a substrate including a first region and a second region;
a first buffer layer formed over the substrate and between first and second isolation features in the first region, the first and second isolation features being distinct from the substrate, the first buffer layer having a first width;
a second buffer layer formed over the substrate and between third and fourth isolation features in the second region, the third and fourth isolation features being distinct from the substrate, the second buffer layer having a second width different from the first width of the first buffer layer;
a first fin structure formed over the first buffer layer and between the first and second isolation features in the first region; and
a second fin structure formed over the second buffer layer and between the third and fourth isolation features in the second region.
1 Assignment
0 Petitions
Accused Products
Abstract
A semiconductor device and method for fabricating a semiconductor device is disclosed. An exemplary semiconductor device includes a substrate including a first region and a second region. The semiconductor device further includes a first buffer layer formed over the substrate and between first and second isolation regions in the first region and a second buffer layer formed over the substrate and between first and second isolation regions in the second region. The semiconductor device further includes a first fin structure formed over the first buffer layer and between the first and second isolation regions in the first region and a second fin structure formed over the second buffer layer and between the first and second isolation regions in the second region. The first buffer layer includes a top surface different from a top surface of the second buffer layer.
-
Citations
19 Claims
-
1. A semiconductor device, comprising:
-
a substrate including a first region and a second region; a first buffer layer formed over the substrate and between first and second isolation features in the first region, the first and second isolation features being distinct from the substrate, the first buffer layer having a first width; a second buffer layer formed over the substrate and between third and fourth isolation features in the second region, the third and fourth isolation features being distinct from the substrate, the second buffer layer having a second width different from the first width of the first buffer layer; a first fin structure formed over the first buffer layer and between the first and second isolation features in the first region; and a second fin structure formed over the second buffer layer and between the third and fourth isolation features in the second region. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A semiconductor device, comprising:
-
a substrate including a first region and a second region; isolation features distinct from the substrate and formed within trenches of the substrate in the first and second regions; a first buffer layer including first facets formed over the substrate and between the isolation features in the first region; a second buffer layer including second facets different from the first facets and formed over the substrate and between the isolation features in the second region; a first semiconductor material formed over the first facets of the first buffer layer and between the isolation features in the first region; and a second semiconductor material formed over the second facets of the second buffer layer and between the isolation features in the second region, the second semiconductor material being different from the first semiconductor material, wherein the buffer layer in the first region includes a total height different from a total height of the buffer layer in the second region. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A semiconductor device, comprising:
-
a substrate including a first region and a second region; isolation features formed within trenches of the substrate in the first and second regions; a buffer layer formed over the substrate and between the isolation features in the first and second regions; a first semiconductor material formed over the buffer layer and between the isolation features in the first region; and a second semiconductor material formed over the buffer layer and between the isolation features in the second region, the second semiconductor material being different from the first semiconductor material, wherein the buffer layer in the first region includes a total height different from a total height of the buffer layer in the second region. wherein the buffer layer in the first region includes facets having facets a vertical dimension less than about 2 nm and a longitudinal dimension less than about 2.5 nm, and wherein the buffer layer in the second region includes facets having a vertical dimension ranging from about 5 nm to about 2 nm and a longitudinal dimension ranging from about 4.5 nm to about 2.5 nm.
-
-
16. A semiconductor device, comprising:
-
a substrate including a first region and a second region; two shallow trench isolation (STI) features distinct from the substrate and formed in the first region; two STI features distinct from the substrate and formed in the second region; a first buffer layer formed between the two STI features in the first region; a second buffer layer formed between the two STI features in the second region; a first semiconductor material formed over the buffer layer and between the two STI features in the first region, wherein the first semiconductor material is in physical contact with the two STI features in the first region; a second semiconductor material formed over the buffer layer and between the two STI features in the second region, wherein the first buffer layer includes a top most surface facing away from a top most surface of the substrate in the first region that is below a top most surface of the two STI features in the first region, wherein the second buffer layer includes a top most surface facing away from a top most surface of the substrate in the second region that is below a top most surface of the two STI features in the second region. - View Dependent Claims (17, 18, 19)
-
Specification