High aspect ratio gapfill process by using HDP
First Claim
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1. A process for filling gaps during integrated circuit production, comprising the steps of:
- providing a gas mixture comprised of silicon-containing, oxygen-containing, and inert components, wherein said inert components comprise no more than 13% total concentration of said gas mixture; and
depositing a film over said gaps by using said gas mixture for simultaneous CVD and sputter etching.
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Abstract
A process for filling high aspect ratio gaps on substrates uses conventional high density plasma deposition processes while reducing the concentration of the inert gas, such as Ar, to 0-13% of the total process gas flow. By reducing the inert gas concentration, sputtering or etching is reduced, resulting in reduced sidewall deposition from the sputtered material. Consequently, gaps with aspect ratios of 3.0:1 and higher can be filled without the formation of voids and without damaging circuit elements.
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10 Claims
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1. A process for filling gaps during integrated circuit production, comprising the steps of:
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providing a gas mixture comprised of silicon-containing, oxygen-containing, and inert components, wherein said inert components comprise no more than 13% total concentration of said gas mixture; and depositing a film over said gaps by using said gas mixture for simultaneous CVD and sputter etching. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process for filling gaps during integrated circuit production, comprising the step of:
depositing a film over said gaps by HDP deposition using a gas mixture comprised of silicon-containing, oxygen-containing, and inert components, wherein said inert components comprise no more than 13% total concentration of said gas mixture.
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