| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve circularity of outer peripheral gring surfaces when a plurality of glass substrates for magnetic disk are manufactured from a stack of a plurality of plate-like glasses. <P>SOLUTION: The method of manufacturing the glass substrates for magnetic disk includes a stack preparation process of preparing the stack of the plurality of plate-like glasses; an immersing process of immersing the stack in a grinding liquid; and a grinding process of grinding the stack into a cylindrical shape by moving an integrated core drill, having a large-diameter cylindrical outer peripheral grinding grindstone and a small-diameter cylindrical inner-peripheral grinding grindstone arranged coaxially, in the stacking direction of the stack while rotating the integrated core drill on its axis and supplying the grinding liquid to an inner-peripheral grinding surface formed as the inner-peripheral grinding grindstone and plate-like glasses come into contact with each other. <P>COPYRIGHT: (C)2012,JPO&INPIT |
