METHODS OF STRESSING TRANSISTOR CHANNEL WITH REPLACED GATE AND RELATED STRUCTURES
First Claim
1. A method of stressing a channel of a transistor, the method comprising:
- providing an intrinsically stressed material over the transistor including a gate thereof;
removing a portion of the intrinsically stressed material over the gate;
removing at least a portion of the gate, allowing stress retained by the gate to be transferred to the channel;
replacing the gate with a replacement gate; and
removing the intrinsically stressed material.
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Accused Products
Abstract
Methods of stressing a channel of a transistor with a replaced gate and related structures are disclosed. A method may include providing an intrinsically stressed material over the transistor including a gate thereof; removing a portion of the intrinsically stressed material over the gate; removing at least a portion of the gate, allowing stress retained by the gate to be transferred to the channel; replacing (or refilling) the gate with a replacement gate; and removing the intrinsically stressed material. Removing and replacing the gate allows stress retained by the original gate to be transferred to the channel, with the replacement gate maintaining (memorizing) that situation. The methods do not damage the gate dielectric. A structure may include a transistor having a channel including a first stress that is one of a compressive and tensile and a gate including a second stress that is the other of compressive and tensile.
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Citations
26 Claims
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1. A method of stressing a channel of a transistor, the method comprising:
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providing an intrinsically stressed material over the transistor including a gate thereof; removing a portion of the intrinsically stressed material over the gate; removing at least a portion of the gate, allowing stress retained by the gate to be transferred to the channel; replacing the gate with a replacement gate; and removing the intrinsically stressed material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of stressing a channel of a transistor, the method comprising:
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first providing a metal layer over the transistor including a gate and a source/drain region thereof; second providing an intrinsically stressed material over the transistor including the gate and the source/drain region thereof; removing a portion of the intrinsically stressed material over each gate; removing a portion of the metal layer over the gate; removing at least a portion of the gate; replacing the gate with a metal; annealing to form a stressed silicide gate and stressed silicide portions in the source/drain region; and removing the intrinsically stressed material and the metal layer. - View Dependent Claims (13, 14, 15, 16)
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17. A structure comprising:
a transistor having a channel including a first stress that is one of compressive and tensile and a gate including a second stress that is the other of compressive and tensile. - View Dependent Claims (18, 19, 20, 21)
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22. A structure comprising:
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a transistor having a gate including a stressed silicide for memorizing a stress therein; and a source region and a drain region each including a stress silicide portion for memorizing the stress. - View Dependent Claims (23, 24, 25, 26)
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Specification