Semiconductor device and method for fabricating the same
First Claim
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1. A semiconductor device, comprising:
- a substrate including a first region and a second region;
a first gate spacer on the first region, the first gate spacer defining a first trench;
a second gate spacer on the second region, the second gate spacer defining a second trench;
a first gate electrode filling the first trench;
a second gate electrode filling the second trench;
a first interlayer insulating layer on the substrate, the first interlayer insulating layer surrounding the first gate spacer; and
a second interlayer insulating layer on the substrate, the second interlayer insulating layer surrounding the second gate spacer,wherein the first interlayer insulating layer and the second interlayer insulating layer each includes a lower portion and an upper portion,the upper portion of the first interlayer insulating layer and the upper portion of the second interlayer insulating layer each include germanium, andthe lower portion of the first interlayer insulating layer and the lower portion of the second interlayer insulating layer each do not include germanium.
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Abstract
A semiconductor device capable of adjusting profiles of a gate electrode and a gate spacer by implanting or doping an element semiconductor material into an interlayer insulating layer may be provided. The semiconductor device may include a gate spacer on a substrate, the gate spacer defining a trench, a gate electrode filling the trench, and an interlayer insulating layer on the substrate, which surrounds the gate spacer, and at least a portion of which includes germanium.
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Citations
14 Claims
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1. A semiconductor device, comprising:
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a substrate including a first region and a second region; a first gate spacer on the first region, the first gate spacer defining a first trench; a second gate spacer on the second region, the second gate spacer defining a second trench; a first gate electrode filling the first trench; a second gate electrode filling the second trench; a first interlayer insulating layer on the substrate, the first interlayer insulating layer surrounding the first gate spacer; and a second interlayer insulating layer on the substrate, the second interlayer insulating layer surrounding the second gate spacer, wherein the first interlayer insulating layer and the second interlayer insulating layer each includes a lower portion and an upper portion, the upper portion of the first interlayer insulating layer and the upper portion of the second interlayer insulating layer each include germanium, and the lower portion of the first interlayer insulating layer and the lower portion of the second interlayer insulating layer each do not include germanium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A semiconductor device, comprising:
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a substrate including a first region and a second region; a first gate spacer on the first region, the first gate spacer defining a first trench, a sidewall of the first trench having a slope of a first sign with respect to a bottom surface of the first trench; a second gate spacer on the second region, the second gate spacer defining a second trench, a sidewall of the second trench having a slope of a second sign with respect to a bottom surface of the second trench, the second sign being opposite to the first sign; a first gate electrode filling the first trench; a second gate electrode filling the second trench; and an interlayer insulating layer on the substrate, the interlayer insulating layer surrounding the first gate spacer and the second gate spacer, the interlayer insulating layer including a first portion having an element semiconductor material, wherein a thickness of the first portion of the interlayer insulating layer in the first region is different from a thickness of the first portion of the interlayer insulating layer in the second region. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification