Methods of filling trenches using high-density plasma deposition (HDP)
First Claim
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1. A method of filling trenches, the method comprising:
- forming a first high-density plasma layer on an integrated circuit substrate including at least one trench thereon using a first reaction gas;
etching the first high-density plasma layer using an etch gas including nitrogen fluoride (NF3) gas; and
forming a second high-density plasma layer on the etched first high-density plasma layer using a second reaction gas including nitrogen fluoride.
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Abstract
Methods of filling trenches/gaps defined by circuit elements on an integrated circuit substrate are provided. The methods include forming a first high-density plasma layer on an integrated circuit substrate including at least one trench thereon using a first reaction gas. The first high-density plasma layer is etched using an etch gas including nitrogen fluoride gas (NF3). A second high-density plasma layer is formed on the etched first high-density plasma layer using a second reaction gas including nitrogen fluoride.
363 Citations
26 Claims
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1. A method of filling trenches, the method comprising:
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forming a first high-density plasma layer on an integrated circuit substrate including at least one trench thereon using a first reaction gas;
etching the first high-density plasma layer using an etch gas including nitrogen fluoride (NF3) gas; and
forming a second high-density plasma layer on the etched first high-density plasma layer using a second reaction gas including nitrogen fluoride. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of filling trenches, the method comprising:
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forming a first high-density plasma layer on an integrated circuit substrate including at least one trench thereon using a first reaction gas including oxygen (O2) and silane (SiH4);
partially etching the first high-density plasma layer by chemically dry etching the first-high-density plasma layer using an etch gas including oxygen and nitrogen fluoride (NF3); and
forming a second high-density plasma layer on the first high-density plasma layer using a second reaction gas including oxygen, silane and nitrogen fluoride at a temperature of from about 650 to about 800°
C. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification