专利名称：Method of manufacturing glass substrate
for use in information recording medium,and method of manufacturing informationrecording medium
发明人：Hiroaki Ikeda,Masaru Suzuki,Kazuna
Sasaki,Yumi Mukai,Jun Ozawa
申请号：US09540886申请日：20000331公开号：US06523367B1公开日：20030225
专利附图：
摘要：In a method of manufacturing a glass substrate for an information recordingmedium including a step for chemically strengthening the glass substrate by contactingthe glass substrate with chemical strengthening processing liquid containing chemicalstrengthening salt, concentration of Fe and Cr is 500 ppb or less in said chemical
strengthening salt, respectively. The concentration may be detected by the use of an ICP(Inductively Coupled Plasma) emission spectrometry analyzing method or a fluorescentX-ray spectroscopy analyzing method.
申请人：HOYA CORPORATION
代理机构：Sughrue Mion, PLLC
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