Coil construction for voice coil motor
US6768229B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2002 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Jul 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coil construction for a voice coil motor is disclosed. The coil construction includes a series of stacked planar coils disposed on a substrate material. Each planar coil is separated from its neighboring coil or coils by a viscoelastic material to reduce vibration of the coil construction. The coil construction is attached to an actuator arm. Control circuitry creates a current in the coil construction to position a head on the actuator arm. Also disclosed is a method for making a coil for a voice coil motor. The method includes the steps of masking a substrate having a conductive layer with a photoresist, exposing the mask to create a pattern of planar coils, developing the photoresist, and etching the conductive layer to create a planar coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.