- 인쇄회로기판상의 금속 배선을 위한 구리 도금막 형성 : 무전해 중성공정
- ㆍ 저자명
- 조양래,이연승,나사균,Cho. Yang-Rae,Lee. Youn-Seoung,Rha. Sa-Kyun
- ㆍ 간행물명
- 한국재료학회지
- ㆍ 권/호정보
- 2013년|23권 11호|pp.661-665 (5 pages)
- ㆍ 발행정보
- 한국재료학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
We investigated the characteristics of electroless plated Cu films on screen printed Ag/Anodized Al substrate. Cu plating was attempted using neutral electroless plating processes to minimize damage of the anodized Al substrate; this method used sodium hypophosphite instead of formaldehyde as a reducing agent. The basic electroless solution consisted of $CuSO_4{cdot}5H_2O$ as the main metal source, $NaH_2PO_2{cdot}H_2O$ as the reducing agent, $C_6H_5Na_3O_7{cdot}2H_2O$ and $NH_4Cl$ as the complex agents, and $NiSO_4{cdot}6H_2O$ as the catalyser for the oxidation of the reducing agent, dissolved in deionized water. The pH of the Cu plating solutions was adjusted using $NH_4OH$. According to the variation of pH in the range of 6.5~8, the electroless plated Cu films were coated on screen printed Ag pattern/anodized Al/Al at $70^{circ}C$. We investigated the surface morphology change of the Cu films using FE-SEM (Field Emission Scanning Electron Microscopy). The chemical composition of the Cu film was determined using XPS (X-ray Photoelectron Spectroscopy). The crystal structures of the Cu films were investigated using XRD (X-ray Diffraction). Using electroless plating at pH 7, the structures of the plated Cu-rich films were typical fcc-Cu; however, a slight Ni component was co-deposited. Finally, we found that the formation of Cu film plated selectively on PCB without any lithography is possible using a neutral electroless plating process.