A first pair electrodes consisting of an anode to which a plurality of wiring lines to be anodized are connected and a cathode that is opposed to the anode, and a second pair electrodes for collecting impurities in a forming solution are immersed in a forming solution. A voltage is applied to the plurality...http://www.google.es/patents/US5503731?utm_source=gb-gplus-sharePatente US5503731 - Method for producing electrodes of semiconductor device
Method for producing electrodes of semiconductor device