| 摘要 |
<p>PROBLEM TO BE SOLVED: To form electroless nickel plating films which are free from defects, such as pits, and have a good adhesion property on hard disk substrates made of glass and ceramics. SOLUTION: In the electroless nickel plating of hard disk substrates made of the glass or the ceramics, the substrates are treated with a catalyst liquid consisting essentially of a water-soluble palladium salt and an amine-base complexing agent and not containing a tin salt after the substrate is subjected to surface adjusting treatment and are then subjected to washing and drying and thereafter, the substrates are immersed into an electroless nickel plating liquid and are subjected to electroless nickel plating.</p> |
