Method of grinding a substrate and method of manufacturing a glass substrate and a magnetic recording medium by the use of the glass substrate
AssigneeHoya Corporation
InventorsShozo Iwabuchi, Masahiro Katagiri
Life of this patent
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Abstract
In a method of grinding side end surfaces of substrates, spacers are interposed between the substrates to form a stack of the substrates and the spacers. The spacers are slightly smaller in size than the substrates. The stack of the substrates and the spacers are ground by a rotatable brush or pad on the side end surfaces of the substrates so as to smooth chamfered portions of the substrates together with the side end surfaces.
Claims18
A method of grinding each side end surface of a plurality of substrates of disk shape, comprising the steps of:
- preparing chamfered substrates each of which has chamfered portions along at least one side end surface;
- successively stacking the chamfered substrates with an intermediary interposed between two adjacent ones of the chamfered substrates;
- and
- grinding each side end surface with the intermediary interposed between the chamfered substrates.
A method of processing a plurality of chamfered substrates of disk shape, each of which has a pair of main surfaces, inner and outer side end surfaces, and chamfered portions contiguous to the main surfaces and the inner and the other side end surfaces, comprising the steps of:
- successively stacking the chamfered substrates with an intermediary interposed between two adjacent ones of the chamfered substrates;
- and
- grinding at least one of the inner and the outer side end surfaces with the intermediary interposed between the chamfered substrates.
A method of manufacturing a magnetic recording medium, comprising the steps of:
- preparing a plurality of chamfered glass substrates;
- successively stacking the chamfered glass substrates with an intermediary interposed between two adjacent ones of the chamfered glass substrates;
- and
- grinding each side end surface of the chamfered glass substrates with the intermediary interposed between the chamfered glass substrates.
Dependencies are inferred from the claim text.