Kabushiki Kaisha Toshiba

Hiromichi Takami

Satoshi Takayama

Tetsuo Okuyama

Kazutaka Matsumoto

A moisture absorbing agent is used in a disk apparatus. The difference in the moisture absorption amount in the hygroscopic isothermal line between the moisture absorbing agent at a relative humidity of 80% and the moisture absorbing agent at a relative humidity of 95% is not less than 30% in the moisture absorbing stage and is not less than 20% in the moisture releasing stage relative to the dry weight of the moisture absorbing agent.

Disk apparatus

Disclosed is a magnetic recording/reading apparatus comprising a ramp formed of a material having at least 30% of a tensile elongation as defined by ASTM D638. The distance c, which is defined as the length between a ramp and a tab measured at the point a/3 apart from the contact portion, a being the contact width of the ramp and the tab, is 0.0015a, or at least 0.015 &mgr;m where a is 10 to 50 &mgr;m.

Magnetic recording/reading apparatus

An epoxy resin composition comprising (a) an epoxy resin, (b) a curing agent, (c) a cure accelerator and (d) silica powder. The silica powder (d) is composed of (d1) a first silica powder having a particle diameter ranging from 5 to 75 .mu.m, (d2) a second silica powder having a particle diameter ranging from 0.2 to 0.9 .mu.m, and (d3) a third silica powder having a particle diameter ranging from 0.01 to 0.08 .mu.m.

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Ome, Japan

Hiromichi Takami