Etching characteristics of TaN/HfO2 structure in Cl 2/Ar and SF6/Cl2/Ar inductively coupled plasma

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Abstract

Plasma etching characteristics of TaN/HfO2 structure in Cl 2/Ar and SF6/Cl2/Ar were systematically investigated using inductively coupled plasma. Etching experiments were conducted in a modified 8-inch commercial ICP etcher having a 3.5 turn spiral copper coil on the top of chamber separated by a quartz window and pumped by a turbo pump backed by rotary pump. The etch rates of TaN to HfO2 were shown as a function of the Cl2/(Ar+Cl2) gas mixing ratio. It was found that above 500W ICP power, the etch rates of HfO2 decreased when increasing the ICP up to 700W.

Original languageEnglish
Title of host publicationDigest of Papers - Microprocesses and Nanotechnology 2004
Pages278-279
Number of pages2
StatePublished - 2004
Event2004 International Microprocesses and Nanotechnology Conference - Osaka, Japan
Duration: 26 Oct 200429 Oct 2004

Publication series

NameDigest of Papers - Microprocesses and Nanotechnology 2004

Conference

Conference2004 International Microprocesses and Nanotechnology Conference
Country/TerritoryJapan
CityOsaka
Period26/10/0429/10/04

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