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SPACER DEFINED FIN GROWTH AND DIFFERENTIAL FIN WIDTH
SPACER DEFINED FIN GROWTH AND DIFFERENTIAL FIN WIDTH
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机译:间隔定义的鳍增长和微分鳍宽度
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摘要
Methods for forming fins with a straight profile by preventing fin bending during STI fill and annealing are disclosed. Embodiments include providing STI regions separated by Si regions, each topped with a hardmask; planarizing the STI regions; removing the hardmask over a portion of the Si regions, forming recesses; forming a conformal spacer layer over the STI regions and in the recesses; removing horizontal portions of the spacer layer; epitaxially growing Si in each recess, forming fins; and etching the STI regions and a remainder of the spacer layer down to the Si regions to reveal the fins.
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