Selective growth of metal-containing hardmask thin films
First Claim
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1. A method comprising:
- providing a patterned semiconductor substrate having features spaced apart on an underlying material to be etched;
filling spaces between the features with an ashable fill such that top horizontal surfaces of the features are exposed and sidewalls of the features contact the ashable fill;
after filling the spaces between the features, selectively depositing a metal-containing hard mask on the exposed top horizontal surfaces of the features relative to the ashable fill; and
removing the ashable fill relative to the features and metal-containing hard mask.
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Abstract
Methods and apparatuses for selectively growing metal-containing hard masks are provided herein. Methods include providing a substrate having a pattern of spaced apart features, each feature having a top horizontal surface, filling spaces between the spaced apart features with carbon-containing material to form a planar surface having the top horizontal surfaces of the features and carbon-containing material, selectively depositing a metal-containing hard mask on the top horizontal surfaces of the features relative to the carbon-containing material, and selectively removing the carbon-containing material relative to the metal-containing hard mask and features.
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Citations
19 Claims
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1. A method comprising:
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providing a patterned semiconductor substrate having features spaced apart on an underlying material to be etched; filling spaces between the features with an ashable fill such that top horizontal surfaces of the features are exposed and sidewalls of the features contact the ashable fill; after filling the spaces between the features, selectively depositing a metal-containing hard mask on the exposed top horizontal surfaces of the features relative to the ashable fill; and removing the ashable fill relative to the features and metal-containing hard mask. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification