Other

Jae Ok Lim

Yang Je Lee

Dek Gin Yang

Myong Gun Chong

Sung Wook Chun

Byong Ho Lee

Min Eui Hong

Kyu Hong An

Disclosed are a conversion coating composition for use in the surface treatment of a PCB and a conversion coating method using the same. The composition comprises 0.1-30 vol % of sulfuric acid; 0.1-15 vol % of hydrogen peroxide; 0.01-10 wt % of an organic acid; 0.1-30 wt % of a nitrogen compound; 0.01-10 wt % of an organic silicate and/or organic titanate; and 0.1-20 wt % of a film forming auxiliary, 0.1-30 wt % of an etching rate controller, 0.1-20 wt % of a reaction promoter and/or 0.1-20 g/l of a stabilizer. This composition is applied to a PCB at 10-60&deg; C. for 1-10 min. The conversion coating film is superb in adhesive strength, acid resistance, and adhesion and can be formed with ease.

Conversion coating composition based on nitrogen and silicon compounds and conversion coating method using the same

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Cheongju-si, South Korea

Jae Ok Lim