Dexter Magnetic Technologies, Inc. Magnetic Media Eraser Single Disk Eraser - Media Preconditioning

Preconditioning with a write head is a slow process. For spin stand metrology, preconditioning with a head can be easily incorporated into existing tests. It complicates and lengthens the evaluation of read-write properties but is manageable. For drive builds, this can be a time consuming and costly process unless a wide write head is employed. We can design and produce permanent magnet single disk erase tools to fully precondition media post sputter. Our magnetic material selection and circuit design expertise guarantees a device that meets magnetic field specifications within the physical limitation of existing or new equipment. In addition, our familiarity with HDDR devices and clean room compatibility requirements assures that the final device will be manufactured compliant to cleanliness and ESD specifications. We have designed and manufactured devices for both PMR and LMR media that are successfully operating in production environments today. Field strength is dependent on the physical size available for the device as well as gap requirements. In general, however, these devices can be designed to produce fields upwards of 1T on the media surface.