PLATING ON POLYIMIDE

Electroless coatings of nickel and copper from five electroless solutions were deposited on polyimide. Thicknesses approaching 90 microinches (2.3 micrometers) could be obtained but increasing the coating thickness beyond 90 microinches could only be achieved by electroplating. Four etching solutions for polyimides were investigated to determine their effect on the adhesion of the electroless coating to the polyimide.