Patents by Inventor Kyu Hong An

Kyu Hong An has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Conversion coating composition based on nitrogen and silicon compounds and conversion coating method using the same
    Patent number: 6475299
    Abstract: 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° C. for 1-10 min. The conversion coating film is superb in adhesive strength, acid resistance, and adhesion and can be formed with ease.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: November 5, 2002
    Assignees: Samsung Electro-Mechanics Co., Ltd., SD Chemical Co., Ltd.
    Inventors: Byong Ho Lee, Dek Gin Yang, Yang Je Lee, Myong Gun Chong, Jae Ok Lim, Sung Wook Chun, Min Eui Hong, Kyu Hong An