Patent ID: 7144298
Filing Date: 2006-12-05
Classification: B23H,B24B,C25F,H01L

Abstract:
1. A processing apparatus for planarization, comprising: a platen for rotating a semiconductor substrate, the platen being capable of holding the semiconductor substrate, a tool for contacting the semiconductor substrate and for electropolishing the surface of the substrate, a power supply for applying voltage to an electrode provided to the tool for electropolishing, an electrolytic solution supplying means for supplying electrolytic solution to the semiconductor substrate, and an image detector for detecting a polished state of the electropolished surface of the semiconductor substrate, wherein: said tool for electropolishing comprises: a plurality of electrode units, each electrode unit including a positive electrode and a negative electrode, to which positive voltage and negative voltage are applied respectively; and a supporting body by which the plurality of electrode units is supported, wherein the positive electrode is surrounded by the negative electrode, and wherein pulse voltage is applied to the electrodes from the power supply.