Patent ID: 7427227

Claim:
A fluid polishing method for polishing and processing a fine aperture in a work by supplying slurry as a polishing fluid to said work by a feeding apparatus, comprising a primary process, a secondary process and a finishing process, wherein: in said primary process, said slurry is supplied until a slurry feed flow rate from said feeding apparatus increases to a predetermined value smaller than a predetermined slurry flow rate necessary for processing said fine aperture, said feeding apparatus is then stopped to stop the feed of said slurry, an operation fluid is caused to flow to the fine aperture of said work and a first operation fluid flow rate (Q 1 ) is measured; in said second process, a second processing time (T 1 ) not reaching a target processing is calculated on the basis of said first operation fluid flow rate (Q 1 ), said slurry is supplied for said second processing time (T 1 ) to execute polishing, said feeding apparatus is stopped when said second processing time (T 1 ) is reached to stop the feed of said slurry, said operation fluid is caused to flow to the fine aperture of said work and a second operation fluid flow rate (Q 2 ) is measured; in said finishing process, a target third processing time (T 2 ) is calculated on the basis of said second operation fluid flow rate (Q 2 ), said slurry is supplied for said target third processing time (T 2 ) to execute polishing, said feeding apparatus is stopped when the processing time reaches said third processing time (T 2 ) to stop the feed of said slurry and processing; the processing time (T 1 , T 2 ) in each of said secondary and finishing processes is determined by setting a processing capacity coefficient (K); and said processing capacity coefficient (K) is a function (K=f(x), x=dQ/T) of a ratio (dQ/T) of an increment amount (dQ), of the operation fluid flow rates during processing, to said processing time (T 1 , T 2 ).