SEMICONDUCTOR DEVICE
First Claim
1. A semiconductor device comprising:
- a first MIS transistor; and
a second MIS transistor,whereinthe first MIS transistor includesa first gate insulating film formed on a first active region in a semiconductor substrate,a first gate electrode formed on the first gate insulating film,a first silicide layer formed on the first gate electrode,first sidewalls each including a first inner sidewall formed on a side surface of the first gate electrode and having an L-shaped cross-section, andfirst source/drain regions of a first conductivity type formed in the first active region laterally outside the first sidewalls,the second MIS transistor includesa second gate insulating film formed on a second active region in the semiconductor substrate,a second gate electrode formed on the second gate insulating film,a second silicide layer formed on the second gate electrode,second sidewalls each including a second inner sidewall formed on a side surface of the second gate electrode and having an L-shaped cross-section, andsecond source/drain regions of a second conductivity type formed in the second active region laterally outside the second sidewalls,the first source/drain regions include a silicon compound layer which is formed in trenches provided in the first active region and causes a first stress in a gate length direction of a channel region in the first active region, anda width of the first inner sidewall is smaller than a width of the second inner sidewall.
2 Assignments
0 Petitions
Accused Products
Abstract
A semiconductor device includes a first and a second MIS transistor. The first and second MIS transistors include a first and a second gate electrode formed on a first and a second active region with a first and a second gate insulating film being formed therebetween, first and second sidewalls including a first and a second inner sidewall formed on side surfaces of the first and second gate electrodes and having an L-shaped cross-section, and first and second source/drain regions formed in the first and second active regions laterally outside the first and second sidewalls. The first source/drain regions include a silicon compound layer formed in trenches provided in the first active region and causes a first stress in a gate length direction of a channel region in the first active region. A width of the first inner sidewall is smaller than a width of the second inner sidewall.
-
Citations
15 Claims
-
1. A semiconductor device comprising:
-
a first MIS transistor; and a second MIS transistor, wherein the first MIS transistor includes a first gate insulating film formed on a first active region in a semiconductor substrate, a first gate electrode formed on the first gate insulating film, a first silicide layer formed on the first gate electrode, first sidewalls each including a first inner sidewall formed on a side surface of the first gate electrode and having an L-shaped cross-section, and first source/drain regions of a first conductivity type formed in the first active region laterally outside the first sidewalls, the second MIS transistor includes a second gate insulating film formed on a second active region in the semiconductor substrate, a second gate electrode formed on the second gate insulating film, a second silicide layer formed on the second gate electrode, second sidewalls each including a second inner sidewall formed on a side surface of the second gate electrode and having an L-shaped cross-section, and second source/drain regions of a second conductivity type formed in the second active region laterally outside the second sidewalls, the first source/drain regions include a silicon compound layer which is formed in trenches provided in the first active region and causes a first stress in a gate length direction of a channel region in the first active region, and a width of the first inner sidewall is smaller than a width of the second inner sidewall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
wherein the third sidewalls include third inner sidewalls formed on the side surfaces of the third gate electrode and having an L-shaped cross-section, third middle sidewalls formed on the third inner sidewalls and having an L-shaped cross-section, and third outer sidewalls formed on the third middle sidewalls, the first sidewall and the second sidewall do not have an outer sidewall, a silicon compound layer is not formed in the third source/drain regions, and a width of the third inner sidewall is larger than the width of the first inner sidewall.
-
-
13. The semiconductor device of claim 12, further comprising:
-
a protective insulating film formed on the third gate electrode, wherein a silicide layer is not formed on the third gate electrode.
-
-
14. The semiconductor device of claim 1, wherein
a height of an upper end of the first inner sidewall is lower than a height of an upper end of the second inner sidewall. -
15. The semiconductor device of claim 1, wherein
a height of an upper surface of the first gate electrode is lower than a height of an upper surface of the second gate electrode.
Specification