Method of electroplating printed circuit board using magnetic field having periodic directionality

Abstract

Disclosed is a method of electroplating a printed circuit board using a magnetic field having periodic directionality, in which the printed circuit board is electroplated using a magnetic field that is generated substantially perpendicular to a current direction and that has periodic directionality between a forward wave and a reverse wave. According to the method of the present invention, since the magnetic field having the periodic directionality is used, the aging of the plating solution may be prevented and the ionic concentration thereof may be made uniform even without the use of an external liquid flow device, and as well, the substrate may be uniformly plated.

1 . A method of electroplating a printed circuit board using a magnetic field having periodic directionality, comprising: 
 (a) bringing an electrolyte solution into contact with a surface of a printed circuit board; and    (b) simultaneously applying a magnetic field to the electrolyte solution and applying voltage between the printed circuit board and the electrolyte solution;    wherein the magnetic field is generated perpendicular to a current direction and has periodic directionality between a forward wave and a reverse wave.    
   
   
       2 . The method as set forth in  claim 1 , wherein the magnetic field is supplied using permanent magnets.  
   
   
       3 . The method as set forth in  claim 1 , wherein the magnetic field having the periodic directionality is supplied through rotation of a pair of permanent magnets.  
   
   
       4 . The method as set forth in  claim 1 , wherein the magnetic field is supplied using electromagnets.  
   
   
       5 . The method as set forth in  claim 1 , wherein the magnetic field having the periodic directionality is supplied through change in a current waveform using a pair of electromagnets and a pulse modulator/demodulator connected thereto.  
   
   
       6 . The method as set forth in  claim 1 , wherein the magnetic field having the periodic directionality is supplied through change in a current waveform using a pair of electromagnets and a reverse pulse rectifier connected thereto.  
   
   
       7 . The method as set forth in  claim 1 , wherein the electrolyte solution includes a copper ion.