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A glass substrate lamination tool, a glass substrate end surface polishing method, and a manufacturing method of the glass substrate

A glass substrate and grinding method technology, applied in grinding devices, grinding machine tools, manufacturing tools, etc., can solve the problems of reduced roundness, reduced concentricity of glass substrates, dislocation of glass substrates, etc. Improve the effect of concentricity and roundness

Inactive Publication Date: 2013-04-03
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the diameter of the first plate connector is smaller than the diameter of the inner hole of the glass substrate laminate, the glass substrate may be misaligned during the polishing process.
In this case, there may also be problems related to processing accuracy such as lower concentricity of the obtained glass substrate, lower roundness of the round hole (inner peripheral portion) or outer peripheral portion of the glass substrate, etc.

Method used

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  • A glass substrate lamination tool, a glass substrate end surface polishing method, and a manufacturing method of the glass substrate
  • A glass substrate lamination tool, a glass substrate end surface polishing method, and a manufacturing method of the glass substrate
  • A glass substrate lamination tool, a glass substrate end surface polishing method, and a manufacturing method of the glass substrate

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Experimental program
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Effect test

no. 1 approach

[0032] In this embodiment, the glass substrate lamination tool of this invention is demonstrated.

[0033] The glass substrate lamination tool of the present invention used when grinding the outer peripheral end surface and / or the inner peripheral end surface of a glass substrate laminate having a central part having a Disk-shaped glass substrates with round holes are laminated.

[0034] First, the glass substrate lamination tool of the present invention has a shaft inserted into a circular hole of a glass substrate for magnetic recording media to support the inner peripheral end surface of the glass substrate laminate for magnetic recording media, and to carry out the glass substrate for magnetic recording media. Alignment of substrates. And the said shaft is respectively formed with the set bolt fitting part which fits the set bolt to the both ends of a shaft, and the shaft fixing part which supports a glass substrate laminated body around a shaft.

[0035] Hereinafter, th...

no. 2 approach

[0097] This embodiment demonstrates the end face grinding method of the glass substrate for magnetic recording media using the glass substrate lamination tool demonstrated in 1st Embodiment.

[0098] Specifically, it is a method of polishing the outer peripheral end surface and the inner peripheral end surface of the glass substrate for a magnetic recording medium using the glass substrate lamination tool described in the first embodiment.

[0099] A set bolt was attached to the set bolt fitting part of the shaft which held the glass substrate laminated body, and the outer peripheral end surface of the glass substrate laminated body was grind|polished.

[0100] The shaft holding the glass substrate laminate is fixed to the inner peripheral end surface grinding tool, and after the inner peripheral end surface grinding tool fixes (clamps) the glass substrate laminate, the shaft is drawn out to grind the inner peripheral end surface of the glass substrate laminate.

[0101] Here,...

no. 3 approach

[0106] In this embodiment, the manufacturing method of the glass substrate for magnetic recording media is demonstrated.

[0107] Specifically, the manufacturing method of the glass substrate for magnetic recording media includes: the end face grinding process of grinding the inner peripheral end face and the outer peripheral end face of the glass substrate for magnetic recording media in the shape of a disc; The main plane grinding process of grinding the main plane; and the cleaning process of the glass substrate for the magnetic recording medium. Furthermore, the end face grinding step is a step of performing the end face grinding method described in the second embodiment.

[0108] In addition, it is also possible to provide a step of processing the glass substrate into a disc shape (shape imparting step) before the end face grinding step. The glass substrate used at this time is not particularly limited, and various glass substrates can be used. For example, amorphous gla...

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Abstract

The purpose of the invention aims at providing a glass substrate lamination tool, a glass substrate end surface polishing method, and a manufacturing method of the glass substrate. The glass substrate end surface polishing method and the manufacturing method of the glass substrate may increase processing accuracy and productivity in end face polishing step and is easy to manipulate and may polish outer end face and the inner end face while the glass substrate lamination is not disintegrated. The glass substrate lamination tool is used for polishing a disc-shaped magnetic recording media equipped with a circular hole at the central part of the magnetic recording media by using the outer end face and / or the inner end face of the glass substrate lamination laminated by the glass substrates. The glass substrate lamination tool is characterized by comprising a shaft which is inserted into the hole of the glass-substrate-used magnetic recording media, which supports the inner end face of the glass substrate lamination, and which performs counterpoint on the glass-substrate-used magnetic recording media. The shaft comprises locking bolt inlaying portion capable of cooperating with a locking bolt at two ends of the shaft, and a shaft fixing portion which supports the glass substrate lamination round the shaft.

Description

technical field [0001] The present invention relates to a glass substrate lamination tool, a method for grinding an end surface of a glass substrate for a magnetic recording medium using the tool, and a method for manufacturing a glass substrate for a magnetic recording medium using the end surface grinding method. Background technique [0002] Conventionally, aluminum alloy substrates have been used for disk-shaped magnetic disks used in magnetic disk recording devices and the like. However, in recent years, glass substrates, which are harder than aluminum alloy substrates and have excellent planarity and smoothness, have become mainstream in response to demands for high-density recording. [0003] In the manufacturing process of the glass substrate for magnetic recording media, there is a processing step of subjecting the flat surface and end surfaces (inner and outer peripheral surfaces) of the glass substrate to processing such as grinding and polishing. Furthermore, as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B37/34B24B37/07
Inventor 山先达也赤堀正宪坂本高志
Owner ASAHI GLASS CO LTD
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