Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Research on the Adhesion of Flexible Copper Clad Laminates According to Species of Polyimide

폴리이미드 종류에 따른 연성 동박 적층판의 부착력 연구

  • Lee Jae Won (Dept. of Materials Engineering , Korea University of Technology and Education) ;
  • Kim Sang Ho (Dept. of Materials Engineering , Korea University of Technology and Education)
  • 이재원 (한국기술교육대학교 신소재공학과) ;
  • 김상호 (한국기술교육대학교 신소재공학과)
  • Published : 2005.04.01
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Abstract

Flexible copper clad laminates (FCCL) fabricated by sputtering has advantages in fine pitch etching and dimensional accuracy than previous casting or laminating type FCCL, But its lower adhesion is inevitable technical challenge to solve for commercializing it. Chromium (Cr) which strongly reacts with O moiety was used as tie-coating layer in order to improve low adhesion between copper (Cu) and polyimide (PI). Sputtering raw polyimide (SRPI) and casting raw polyimide (CRPI) were used as substrates at this research. PI was pretreated by plasma before sputtering, and each sample was varied with RF power and Cr thickness on sputtering. Peel strength of the FCCL on SRPI was higher than that on CRPI. Adhesion had maximum value when 10 nm of Cr was deposited on SRPI by RF power of 50 W. It seems to be by the formation of Cu-Cr-O solid solution at the metal-PI interface.

Keywords

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