Horizontal loader for high density servo track writing
US6407878B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1999 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Aug 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/121
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
One aspect of the invention relates to an apparatus and method for retaining a disc drive head disk assembly (HDA) during a servo track writing procedure. The HDA includes a base, a disc stack coupled to a spindle rotatably attached to the base by a spindle shaft, and an actuator assembly pivotally attached to the base at a pivot shaft. Attached to one end of the actuator assembly proximal the disc stack is one or more transducers for reading/writing information from/to the discs. In one embodiment, the method includes restraining the ends of the spindle shaft and pivot shaft during servo track writing so that relative deflection therebetween is minimized. That is, all but rotational motion of the components is substantially eliminated. An apparatus for restraining the ends of the spindle shaft and pivot shaft is also provided. By so restraining the shaft and spindle, the servo information written by the transducers is concentric to the rotation of the disk, reducing track misregistration and improving maximum track density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.