发明授权
- 专利标题: Process for fabricating a multi-layer magnetic thin film disk
- 专利标题(中): 制造多层磁性薄膜盘的工艺
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申请号: US248141申请日: 1981-03-30
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公开(公告)号: US4356066A公开(公告)日: 1982-10-26
- 发明人: Gerhard E. Schmid , Werner Steiner , Gerhard Trippel
- 申请人: Gerhard E. Schmid , Werner Steiner , Gerhard Trippel
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 优先权: DEX3014718 19800417
- 主分类号: G11B5/66
- IPC分类号: G11B5/66 ; C09D163/00 ; G11B5/73 ; G11B5/738 ; G11B5/82 ; G11B5/84 ; G11B5/85 ; G11B5/858 ; H01F10/30 ; H01R12/18 ; C25D11/04
摘要:
Multi-layer magnetic thin film disks comprising a synthetic resin layer on an aluminum-containing substrate and an overlying metallic magnetic layer, are liable to have pin holes in the synthetic resin layer caused by galvanic corrosion of the aluminum in the substrate. The pin holes are passivated by aluminum oxide produced therein by anodically oxidizing the aluminum of the substrate in an electrolytic bath, the electric voltage of which is well below the normal passivation voltage for aluminum.