Strain Bars in Stressed Layers of MOS Devices
First Claim
Patent Images
1. A semiconductor structure comprising:
- an active region;
a gate strip overlying the active region;
a metal-oxide-semiconductor (MOS) device, wherein a portion of the gate strip forms a gate of the MOS device, and wherein a portion of the active region forms a source/drain region of the MOS device;
a stressor region over the MOS device; and
a stressor-free region inside the stressor region and outside theregion over the active region.
1 Assignment
0 Petitions
Accused Products
Abstract
A semiconductor structure includes an active region; a gate strip overlying the active region; and a metal-oxide-semiconductor (MOS) device. A portion of the gate strip forms a gate of the MOS device. A portion of the active region forms a source/drain region of the MOS device. The semiconductor structure further includes a stressor region over the MOS device; and a stressor-free region inside the stressor region and outside the region over the active region.
137 Citations
20 Claims
-
1. A semiconductor structure comprising:
-
an active region; a gate strip overlying the active region; a metal-oxide-semiconductor (MOS) device, wherein a portion of the gate strip forms a gate of the MOS device, and wherein a portion of the active region forms a source/drain region of the MOS device; a stressor region over the MOS device; and a stressor-free region inside the stressor region and outside theregion over the active region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A semiconductor structure comprising:
-
a semiconductor substrate; an active region in the semiconductor substrate; an isolation region in the semiconductor substrate and adjoining the active region; a metal-oxide-semiconductor (MO S) device comprising; a gate electrode over the active region; and a source region and a drain region on opposing sides of the gate electrode, wherein the source and drain regions overlap portions of the active region; a stressor layer over the active region and the isolation region; a stressor-free region encircled by the stressor layer and directly overlying the isolation region; and a first strain bar in the stressor-free region. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. A semiconductor structure comprising:
-
a semiconductor substrate; an active region in the semiconductor substrate; a shallow trench isolation (STI) region in the semiconductor substrate and adjoining the active region; a metal-oxide-semiconductor (MOS) device comprising; a gate electrode over the active region; and a source region and a drain region on opposing sides of the gate electrode, wherein the source and the drain regions overlap portions of the active region; a contact etch stop layer (CESL) over the active region and the STI region; a stressor-free region overlying the isolation region, where the stressor-free region is encircled by the CESL; a strain bar filling the stressor-free region; an inter-layer dielectric (ILD) over the CESL; and a contact plug in the ILD and contacting one of the source and drain regions. - View Dependent Claims (19, 20)
-
Specification