METHOD OF CUTTING GLASS SUBSTRATE AND METHOD OF MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC RECORDING MEDIUM

PROBLEM TO BE SOLVED: To provide a method of improving efficiency of grinding processing in cutting of a disk-like glass substrate out of a glass plate using a core drill, and a method of suppressing chipping of the glass substrate.SOLUTION: There is provided a method of cutting a glass substrate in...

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Bibliographic Details
Main Authors ONO TAKEAKI, SAKAMOTO TAKASHI
Format Patent
LanguageEnglish
Japanese
Published 16.07.2015
Subjects
CHEMISTRY
CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
GLASS
GRINDING
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
PERFORMING OPERATIONS
PHYSICS
POLISHING
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
TOOLS FOR GRINDING, BUFFING, OR SHARPENING
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To provide a method of improving efficiency of grinding processing in cutting of a disk-like glass substrate out of a glass plate using a core drill, and a method of suppressing chipping of the glass substrate.SOLUTION: There is provided a method of cutting a glass substrate in which a disk-like substrate is cut out of a glass plate using a core drill. The core drill has cylindrical grinding parts 42, 52 having abrasive grains 60 fixed with a binder 70, and the grinding parts 42, 52 each have a tip part 80 where the abrasive grains 60 and binder 70 are exposed, and side face parts 82, 83 which each have a protective film 90 formed on a surface of the binder 70 on the side face of the cylindrical shape, the abrasive grain content of the grinding parts 42, 52 being 6-15% in volume percentage. 【課題】コアドリルを用いてガラス板から円盤状ガラス基板を切断する際の研削加工の加工効率の向上方法、及びガラス基板のチッピングの抑制方法を提供する。【解決手段】コアドリルを用いてガラス板から円盤状ガラス基板を切断するガラス基板の切断方法であって、前記コアドリルは、砥粒６０を結合剤７０で固定した円筒形状の研削部４２，５２を有し、前記研削部４２，５２は、前記砥粒６０及び前記結合剤７０が表出した先端部８０と、前記円筒形状の側面の前記結合剤７０の表面に保護膜９０を形成した側面部８２，８３と、を有し、前記研削部４２，５２の砥粒含有量が体積比率６％〜１５％であるガラス基板の切断方法が提供される。【選択図】図７
Bibliography:Application Number: JP20140000344