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Method for manufacturing semiconductor device and apparatus for manufacturing thereof
   
Document Number
US Patent 6908860
Issued Date
June 21, 2005
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Abstract
The object of the invention is to provide a method of manufacturing a semiconductor device and a processing apparatus for planarization wherein to form copper wiring in multiple layers. The removal of a residue of polishing by local electro polishing, the enhancement of the performance of planarization by using a grindstone and the reduction by small frictional force in electro polishing of damage, are enabled. To achieve the object, the following measures are taken. A residue of polishing of copper is removed by combining the detection of a local area including the residue of polishing of copper and local processing for electro polishing. As small-load processing for planarization is enabled by using electro polishing, multilayer interconnection structure using low-k material as a dielectric interlayer is also enabled. Plural pairs of small unit electrodes in a pair of which minus electrodes surround a plus electrode are provided to a tool for electro polishing, each electrode is connected to a power supply, pulse voltage is applied to each electrode and copper is electrolytically polished.
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Number of Claims:
10
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Owner
Hitachi, Ltd. (Tokyo,JP)
Published
June 21, 2005
Application Number
10/457,369
Filed
June 10, 2003
US Classification
438/689   257/E21.583 438/672 438/691 438/692 438/697
Int'l Classification
H01L   21/70   (20060101)   H01L   21/768   (20060101)  
Examiner
Priority Data
Aug 27, 2002 [JP] 2002-246343
USPTO Field of Search
438/689   438/672  
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