Polishing method and apparatus
First Claim
1. A polishing method comprising:
- polishing a surface of a substrate by holding the substrate and pressing the substrate against a polishing surface of a turntable, the surface of the substrate having a semiconductor device thereon; and
cleaning at least a polished surface of the substrate while supplying electrolyzed water to the substrate such that a metal-oxide film is formed on the polished surface of the substrate by said supplying electrolyzed water.
2 Assignments
0 Petitions
Accused Products
Abstract
A polishing apparatus is used for chemical mechanical polishing a copper (Cu) layer formed on a substrate such as a semiconductor wafer and then cleaning the polished substrate. The polishing apparatus has a polishing section having a turntable with a polishing surface and a top ring for holding a substrate and pressing the substrate against the polishing surface to polish a surface having a semiconductor device thereon, and a cleaning section for cleaning the substrate which has been polished. The cleaning section has an electrolyzed water supply device for supplying electrolyzed water to the substrate to clean the polished surface of the substrate while supplying electrolyzed water to the substrate.
23 Citations
13 Claims
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1. A polishing method comprising:
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polishing a surface of a substrate by holding the substrate and pressing the substrate against a polishing surface of a turntable, the surface of the substrate having a semiconductor device thereon; and
cleaning at least a polished surface of the substrate while supplying electrolyzed water to the substrate such that a metal-oxide film is formed on the polished surface of the substrate by said supplying electrolyzed water. - View Dependent Claims (2, 3, 4)
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5. A polishing method comprising:
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conducting a primary polishing of a surface of a substrate by holding the substrate and pressing the substrate against a polishing surface of a turntable, the surface of the substrate having a semiconductor device thereon;
cleaning at least a polished surface of the substrate while supplying electrolyzed water to the substrate such that a metal-oxide film is formed on the polished surface of the substrate by said supplying electrolyzed water; and
conducting a secondary polishing of the polished surface of the substrate by holding the substrate and pressing the substrate against another polishing surface of another turntable. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
cleaning the substrate which has been secondarily polished and then drying the cleaned substrate; and
transferring the cleaned and dried substrate to a cassette.
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13. A polishing method comprising:
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polishing a surface of a substrate by holding the substrate and pressing the substrate against a polishing surface of a turntable, the surface of the substrate having a semiconductor device thereon;
supplying electrolyzed water to a polished surface of the substrate such that a metal-oxide film is formed on the polished surface of the substrate by said supplying electrolyzed water; and
supplying diluted hydrofluoric acid to the substrate after said supplying electrolyzed water.
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Specification