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公开(公告)号:SG10201406081QA
公开(公告)日:2015-04-29
申请号:SG10201406081Q
申请日:2014-09-25
Applicant: LAM RES CORP
Inventor: GUHA JOYDEEP , REDDY SIRISH K , CHATTOPADHYAY KAUSHIK , MOUNTSIER THOMAS W , EPPLER AARON , LILL THORSTEN , VAHEDI VAHID , SINGH HARMEET
Abstract: A method for etching features in a stack is provided. A combination hardmask is formed by forming a first hardmask layer comprising carbon or silicon oxide over the stack, forming a second hardmask layer comprising metal over the first hardmask layer, and patterning the first and second hardmask layers. The stack is etched through the combination hardmask.