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Letter 36037 About nickel electroless plating [Hong Kong]+++++ I want to plate a nickel film (onto Thicon, a glass which is
sputtered with gold). I want to know what solution is required? (Do I
need to buy several chemicals for activator, etc.) And what is the
step of the electroless plating? Leo Tam Ed. note: Hello, Leo. We corrected a couple of speling errors and changed some punctuation, but I'm not sure we got your question right. Could you please spend a copuple of more paragraphs explaining in detail what you are trying to accomplish? Thanks.
Hello Leo, Bellynck Gregory
Thanks for reply my question. The adhesion is not the problem as I
will etch away the gold after plating. However, after reading some
books, I saw that mixed colloidal catalyst is required before the
electroless plating. I want to know that if I already have gold
suface on the surface, can I omit this part and directly immerse the
glass with sputtered gold after cleaning? (As I want to use
photoresist as a barrier for patterning, immersion of that catalyst
may cause the plating on both gold and photoresist surface.) Leo Tam
+++++ Yes you can skip that step when the object you wish to electroless plate (autocatalytic plate) is already conductive. I am not sure, however, whether gold is catalytic to nickel (I doubt that it is). That means you need to 'spark' the plating to get it started, i.e., apply electricity for a second to get the first few atoms of nickel deposited onto the gold.
I think everything can be plated without "catalyst"... that is the
reason for plating problem and instability... Bellynck Gregory
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