Patent ID: 6916233

Claim:
A polishing and cleaning compound system comprising: a polishing device unit operable to polish a thin disc-shaped work piece; a cleaning device unit arranged in series with said polishing device; and a transporting mechanism operable to transport the work piece from a container which installs a plurality of the work pieces to said polishing device unit and said cleaning device unit in turn, wherein said polishing device unit comprises: a pair of cylindrical polishing tools which are in contact with the work piece linearly at a position with a specific value lower than a horizontal reference line passing through a center point of the work piece with an inclination to the horizontal reference line at a specific angle; a first holder operable to vertically grip and hold the work piece transported from the container in which the plurality of the work pieces are installed; and at least two first rollers operable to rotate which are arranged above said cylindrical polishing tools to limit an upper position of the work piece and to make the work piece rotate along its axis and to make the work piece move such that a center of the work piece crosses a contact area of said cylindrical polishing tools; wherein said pair of said cylindrical polishing tools are rotated so as to pull the work piece toward said first rollers for rotation, wherein said first rollers are rotated and moved, and wherein a polishing process is carried out by pouring abrasive toward said pair of cylindrical polishing tools.