Printed circuit board and method of manufacturing the same
Disclosed are a printed circuit board and a method of manufacturing the same, in which a fluorine resin coating layer is formed on a resin substrate, and then a copper layer is formed using a dry process including ion beam surface treatment and vacuum deposition instead of a conventional wet process including surface roughening and electroless copper plating. According to this invention, the interfacial adhesion of the substrate material may be increased without changing the surface roughness thereof, thus realizing a highly reliable fine circuit. As well, a low dielectric constant and a low loss coefficient may be obtained thanks to the formation of the fluorine resin layer. Further, a wet process is replaced with a dry process, whereby the copper plating layer may be formed in an environmentally friendly manner.
1. A printed circuit board, comprising:
a resin substrate for the printed circuit board;
a fluorine resin coating layer formed on at least one surface of the resin substrate;
a via hole formed in a predetermined position of the substrate coated with the fluorine resin;
a copper seed layer formed on a surface of the substrate having the via hole through ion beam surface treatment and vacuum deposition; and
a copper pattern plating layer formed on part of the substrate having the copper seed layer and formed in the via hole.
2. The printed circuit board as set forth in claim 1 , wherein the fluorine resin is selected from the group consisting of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, ethylene-tetrafluoroethylene, polyvinylidene fluoride, ethylene-chlorotrifluoroethylene, polychlorotrifluoroethylene, and combinations thereof.
3. The printed circuit board as set forth in claim 1 , wherein the fluorine resin coating layer has a thickness from 20 nm to 10 μm.
4. The printed circuit board as set forth in claim 1 , wherein the copper seed layer has a thickness from 20 nm to 4 μm.
5. The printed circuit board as set forth in claim 1 , wherein the resin substrate is a substrate composed of epoxy resin or fluorine resin.