Glass manufacturing – Processes – With chemically reactive treatment of glass preform
Patent
1996-10-24
1998-03-10
Czaja, Donald E.
Glass manufacturing
Processes
With chemically reactive treatment of glass preform
65 31, 65117, C03C 2100
Patent
active
057256250
ABSTRACT:
A glass substrate manufacturing method advantageously applicable to magnetic recording disk glass substrates, LCD glass substrates, photomask glass substrates, or optical memory glass substrates. The glass substrate is formed by chemically strengthening a glass substrate by immersing the glass substrate in a chemical reinforcement solution heated and then ion exchanging ions on the surface layer of the glass substrate with ions in the chemical reinforcement solution; removing the substrate from the chemical reinforcement solution and then annealing it to a temperature higher than the crystallization temperature of a molten salt; rapidly cooling the glass substrate at a rate at which the crystallization of the molten salt deposited on the surface of the glass substrate is prevented; and then cleaning the surface of the glass substrate. Moreover, the glass substrate is formed by chemically strengthening a glass substrate by immersing the glass substrate in a chemical reinforcement solution heated and then ion exchanging ions on the surface layer of the glass substrate with ions in the chemical reinforcement solution; and removing the substrate from the chemical reinforcement solution and then cleaning the surface of the glass substrate with a cleaning agent containing acid.
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patent: 5569518 (1996-10-01), Hayashi
Fujita Teruhisa
Kitayama Teruki
Kojima Takeshi
Murano Yoshio
Sekiguchi Kazuhiko
Czaja Donald E.
Hoya Corporation
Manzo Edward D.
Murphy Mark J.
Vincent Sean
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