Low impedance head/preamplifier chip position in a disk drive
US6278583A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1999 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Oct 5, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive system includes a base, a disk rotatably attached to the base, and an actuator assembly pivotally attached to the base. The actuator assembly moves the transducer to selected areas of the disk where information representative of data is to be written or read. The actuator assembly maintains the transducer in a transducing relationship with the disk. The actuator assembly includes an arm and a head gimbal assembly. The head gimbal assembly includes a suspension. The arm has a length from the point where it pivots to the end of the arm. The arm and suspension can be thought of as having a fixed length for a certain sized disk drive. The length of the arm is greater than 4.0 times the length of the suspension. The ratio of the length of the arm to the length of the suspension is in the range of 4.0 to 20.0. The arm is made of a material with a stiffness-to-mass ratio in the range of 6.0 to 20.0.times.10.sup.6 m. The resulting actuator arm is long and stable and the suspension is short so that the signal processing preamplifier chip attached to the arm near the end carrying the transducer is 8 mm or less from the head transducer. The material of the arm conducts heat away …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.