发明授权
- 专利标题: Servo controlled lubricant thickness for near magnetic recording
- 专利标题(中): 用于近磁记录的伺服控制润滑剂厚度
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申请号: US236437申请日: 1994-05-02
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公开(公告)号: US5543983A公开(公告)日: 1996-08-06
- 发明人: Thomas A. Gregory , James A. Hagan , Christopher G. Keller
- 申请人: Thomas A. Gregory , James A. Hagan , Christopher G. Keller
- 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
- 主分类号: G11B33/12
- IPC分类号: G11B33/12 ; G11B17/32 ; G11B19/02 ; G11B25/04 ; G11B33/14
摘要:
The lubricant film for a near contact magnetic recording device is maintained by a closed loop servo control for a recirculating lubricant supply system. A reservoir closely overlies the disk data surface and includes a heater for controlling the temperature difference between the reservoir and the disk surface. Decreasing the heater current reduces the film thickness and increasing the heater current increases the film thickness. A wick system gathers lubricant from within the disk enclosure, which may have been spun off the disk or condensed from the lubricant laden atmosphere and returns the lubricant by capillary action to the reservoir. Further, the reservoir includes two portions which are independently controllable. The first overlies the data band of the disk and the second overlies the start/stop zone and the head when the latter is not operational and parked at the nonoperating location. The start/stop zone reservoir can be used to increase the localized film thickness when the head is coming to rest on the disk surface and during start-up to prevent wear between head and disk.
公开/授权文献
- US5057206A Process for the production of white oils 公开/授权日:1991-10-15
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