Hard disc drive and a servo signal writing apparatus

Head amplifier and an optical disk device using the same

Head device for magneto-optical disk

Heat assisted magnetic recording head with a planar waveguide

Heat shut off condition determination method and apparatus for o

Heat source having thermoelectric element, optical pickup...

High capacity digital data storage by transmission of...

High capacity digital data storage by transmission of...

High density data storage system with specifically shaped optica

High density optical head assembly

High density optical storage system

High density recording and reproduction system and method

High efficiency precision laser beam switch

High NA catadioptric focusing device having flat diffractive sur

High NA objective lens for optical pick-up

High NA solid catadioptric focusing device having a flat...

High numerical aperture optical focusing device for use in...

High numerical aperture optical focusing device having a...

High performance DVD writing current circuit

High speed information system utilizing scanning tunneling micro