The Preparation of Tin –Coated Condutive PET Fiber and the Study on EMI Shielding Application

• Main Authors: Ming-chung Pan, 潘明忠
• Other Authors: Jieh-Ming Huang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/39147985254421020354

碩士 === 萬能科技大學 === 材料科技研究所 === 98 === As the use of 3C products increases,electromagnetic interference has been a problem for the life time and efficiency of the electronic components .Lots of materials,such as PET fabric、plastics coated with copper and nickel which can be used for shielding electromagnetic radiation and interference.But,it is less likely to research chemical paper coated tin as the EMI material.So, this research aims to study the electroless copper plating process and tin plating on the surface of chemical fabrics.The procedure of pretreatment for chemical paper before electroless copper plating was investigated. The process for prepare conductive paper included etching、activating、electroless copper plating and tin plating. The properties of conductive paper such as surface resistance,shielding effectiveness and adhesion of deposit to chemical fabrics were also investigated. In this research ,the best electroless copper plating of chemical paper is copper sulfate 25 g/l,EDTA-2Na 22 g/l,sodium citrate 18 g/l,nickel chloride 0.4 g/l,potassium ferrocyanide 0.2 g/l,HCHO 10 ml/l,2,2 bipyridyl 0.1mg/l,pH 11.5,35℃ and 10 min；the optimum tin plating condition is methane sulfonic acid 120 g/l,tin methane sulfonate 8 g/l,Sn-200 20 ml/l,EN-200 40 ml/l,35℃. The innovations in these investigations are as follows ：the Cu/Sn ductile deposited on chemical paper possesses excellent conductivity and EMI functions；the shielding effectiveness are more than 55 dB in the range from 300 MHz to 2.5 GHz；the shielding effectiveness of conductive fabrics increase with the increase of electromagnetic frequency；post treatment of tin coated conductive paper with BTA derivatives 25 g/L,at 25℃for 10 mins enhances corrosion resistance.