MAGNETIC DISC DRIVE, HELIUM GAS FILLED CONTAINER, AND APPARATUS |
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| 申请号 | US15810758 | 申请日 | 2017-11-13 | 公开(公告)号 | US20180066163A1 | 公开(公告)日 | 2018-03-08 |
| 申请人 | NITTO DENKO CORPORATION; | 发明人 | Kenji FURUTA; Yoshio TERADA; Tadashi TAKAHASHI; Mitsuhiro KANADA; | ||||
| 摘要 | A magnetic disk drive includes a base having an opening, a cover configured to close the opening of the base, and a pressure-sensitive adhesive sheet configured to seal a gap between the base and the cover. The pressure-sensitive adhesive sheet includes a pressure-sensitive adhesive layer, and a substrate layer configured to support the pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer has a storage modulus of 250 kPa or less at 23° C. The substrate layer has an elastic modulus of 1,680 N/cm to 3,000 N/cm. The pressure-sensitive adhesive sheet shows a deviation amount less than 1.0 mm, the amount being the deviation amount of the pressure-sensitive adhesive sheet per 250 gf/cm2 of the sheet in a holding ability test at 80° C. after one hour from a time when the holding ability test is started. Helium gas is accommodated in a cavity defined by the base and the cover. | ||||||
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