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2024年12月27日发(作者：countifs函数的用法及其意义)

专利内容由知识产权出版社提供

专利名称：SUBSTRATE FOR MAGNETIC RECORDING

MEDIUM AND MAGNETIC RECORDING

MEDIUM

发明人：HANIYU FUYUKI,羽生 冬樹

申请号：JP特願平9-163038

申请日：19970619

公开号：JP特開平10-97715A

公开日：19980414

专利附图：

摘要：PROBLEM TO BE SOLVED: To ensure the lower flying characteristic and friction

of a head and the higher recording capacity thereof by irradiating the specific range of

the surface waist of a nonmagnetic brittle substrate with pulse laser beams of a

prescribed wavelength. SOLUTION: The plural points of the front surface of the

substrate 1 for a magnetic recording medium consisting of the flat nonmagnetic brittle

material, such as glass, are irradiated the pulse laser beams of the wavelength absorbed

in the nonmagnetic brittle material in the range of a waist diameter Dμm. Laser marks 3

having a height H of 10 to 500Å in the projecting parts are, therefore, formed at the

plural points. At this time, the waist diameter D to be irradiated is specified to 0.5μJ <6μJ

when the energy with which the evaporation of the substrate 1 is initiated by the pulses

of the laser beams is defined as EvμJ. Magnetic layers 2 are formed on such laser marks 3.

Shape changing parts 30 of the same shape as the shape of the laser marks 3 are formed

on the extreme surface of the magnetic recording medium. As a result, the low flying

characteristic and low friction force of the head are ensured and further, the recording

capacity is improved.

申请人：ASAHI KOMAGU KK,旭コマグ株式会社

地址：東京都千代田区丸の内二丁目1番2号

国籍：JP

代理人：泉名 謙治 (外1名)

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