Patent ID: 8598548
Filing Date: 2013-12-03
Classification: G11B

Abstract:
1. A method for treating a plurality of magnetic recording media with ultraviolet radiation, each of the plurality of magnetic recording media having a magnetic film, a protective film, and a lubricant film on a non-magnetic substrate, the method comprising: providing a cassette that holds only the plurality of magnetic recording media so that no other magnetic recording media is disposed within the cassette; moving the plurality of magnetic recording media to a UV lamp house; a first irradiating step of irradiating each of the plurality of magnetic recording media with ultraviolet radiation from the UV lamp house so that a last magnetic recording media of the plurality of magnetic recording media is irradiated with the ultraviolet radiation for a first time period and after any other magnetic recording media of the plurality of magnetic recording media; after the first irradiating step, moving the plurality of magnetic recording media to the cassette; and concurrently with and after the moving the plurality of magnetic recording media to the cassette, a second irradiating step of further irradiating each of a group of the plurality of magnetic recording media with ultraviolet radiation so that the last magnetic recording media is irradiated with ultraviolet radiation from the UV lamp house for a predetermined holding time period that is 1 to 1.5 times the first time period, the group of magnetic recording media including less than all of the plurality of magnetic recording media.