US 2009/0269154 A1 · SHEET-STACK CORING

Abstract

A method of forming a batch of uniformly shaped glass sheet objects is disclosed. A stack of glass sheets is placed in a frame and submerged in a coolant. A hole is drilled through the stack. The cores of the hole and any debris from the drilling process are swept away in the coolant and pumped through a filter. A pin is inserted into the hole and attached to the base. A head on the pin, or a washer, fixes the stack of glass to the base at the hole. An outer profile is then cut in the glass stack around the hole while the formed objects are held to a base of the frame by the pin. Again, any debris is swept away in the coolant. The uniformly shaped objects are removed from the frame and separated. The glass sheet objects are preferably usable as a substrate for a magnetic or magneto-optical (MO) data/information storage retrieval medium.

Claims20

Dependent claims

A method of manufacturing a batch of glass substrates, comprising:

fixing a stack of sheets of glass into a frame, the frame having a base that includes at least one threaded bore, wherein the sheets of glass cover the threaded bore;
submerging the stack of sheets of glass and the frame in a coolant;
drilling at least one bore through the stack of sheets of glass to expose the at least one threaded bore, whereby debris is deposited in the coolant;
positioning a threaded pin through the at least one bore of the stack of sheets;
fixing the stack of sheets directly to the base using the threaded pin by inserting the threaded pin into the threaded bore;
drilling at least one outer diameter of the batch of substrates around the at least one bore, whereby debris is deposited in the coolant;
and
pumping the coolant and debris deposited therein away from a vicinity of the stack of sheets of glass.

5 more elements

Dependencies are inferred from the claim text.

Sheet-stack coring

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Sheet-stack coring

Life of this patent

Abstract

Claims20