A replication process of metallic micro-mold by using parylene embossing and electroplating
This study demonstrated a replication process for metallic micro-mold that combines the parylene-C (poly-chloro-p-xylylene C) hot-embossing and electroplating techniques. A nickel original master was fabricated using the deep RIE silicon etching followed by the electroplating process. Then, the patterned fields composed of arrays of 25?m-high, 10?m-wide and 1mm-long lines with 10?m spacing in nickel molds were successfully replicated on the 60?m-thick parylene-C films by the hot-emboss process. Under complete filling conditions, the deviation of the replicated micropattern was less than 2.4%. The electroplated copper successfully filled parylene-C replica master patterns with the aspect ratio of 2.5 without the void formation by both adding organic addictives and controlling the seed layer thickness. After electroplating, the copper micro-mold could be successfully separated from the parylene-C replica master.
metallic micro-mold parylene-c (poly-chloro-p-xylylene c) hot-embossing lithography