Plasma-enhanced metal organic chemical vapor deposition of high purity copper thin films using plasma reactor with the H atom source

Hong Jie Jin, Masaharu Shiratani, Takashi Kawasaki, Tsuyoshi Fukuzawa, Toshio Kinoshita, Yukio Watanabe, Hiroharu Kawasaki, Masaharu Toyofuku

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

In situ Fourier-transform infrared measurements have been carried out to study the effects of H atoms on removing impurities in Cu thin films during plasma enhanced metal organic chemical vapor deposition (PEMOCVD) using bis(hexafluoroacetylacetonato) copper (II), Cu(hfac)2 as a source material. The results show that H atoms are very effective in removing impurities in the film, as well as on its surface. Based on such knowledge regarding the effects of H atoms, a PEMOCVD reactor equipped with an H atom source is developed to control both densities of H atoms and Cu-contained radicals independently. High purity (≈ 100%) Cu films of a low resistivity of 2 μΩ cm can be deposited for a H2 gas volume fraction of 50%-67% by using the H atom source, while the high purity films were obtained only for a very high H2 gas volume fraction above about 90% in the case of no H atom source as reported previously. This feature opens up a possibility of deposition of high quality Cu films at a high rate using the reactor equipped with the H atom source, since a gas volume fraction of Cu metal organic material can be increased by more than five times.

Original languageEnglish
Pages (from-to)726-730
Number of pages5
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume17
Issue number3
DOIs
Publication statusPublished - Jan 1 1999

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Plasma-enhanced metal organic chemical vapor deposition of high purity copper thin films using plasma reactor with the H atom source'. Together they form a unique fingerprint.

Cite this