HIGH-TEMPERATURE ISOTROPIC PLASMA ETCHING PROCESS TO PREVENT ELECTRICAL SHORTS

HIGH-TEMPERATURE ISOTROPIC PLASMA ETCHING PROCESS TO PREVENT ELECTRICAL SHORTS

A method includes placing a device having a titanium nitride layer into a chamber. The device also has a mask that includes a photoresist material and an aluminum copper hardmask. The method also includes performing an ashing process on the mask using the chamber. The method further includes, after...

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Hauptverfasser: CHANG YUNGSHAN, ROBY MARY ALYSSA DRUMMOND, LASSITER THOMAS WARREN, JIANG NENG, MOHAMMED NAYEEMUDDIN, SOMAN JOEL
Format: Patent
Sprache:eng
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BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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creator CHANG YUNGSHAN
ROBY MARY ALYSSA DRUMMOND
LASSITER THOMAS WARREN
JIANG NENG
MOHAMMED NAYEEMUDDIN
SOMAN JOEL
description A method includes placing a device having a titanium nitride layer into a chamber. The device also has a mask that includes a photoresist material and an aluminum copper hardmask. The method also includes performing an ashing process on the mask using the chamber. The method further includes, after the ashing process, performing an etching process using the chamber to etch through portions of the titanium nitride layer. Performing the etching process includes flowing a gas mixture containing tetrafluoromethane (CF4) and oxygen gas (O2) into the chamber at a temperature of at least about 200° C.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
title HIGH-TEMPERATURE ISOTROPIC PLASMA ETCHING PROCESS TO PREVENT ELECTRICAL SHORTS
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