Patent ID: 8593915
Filing Date: 2013-11-26
Classification: G11B

Abstract:
1. A method of reading and writing on magnetic media having high coercivity and high anisotropy, comprising: providing a slider mounted read/write head further comprising: preheating said antenna to maintain a predetermined temperature and producing, thereby, a resulting protrusion of said antenna for which said DFH mechanism can react with sufficient speed to compensate by maintaining a substantially fixed distance between said antenna and said magnetic media; and then directing optical radiation from said laser diode onto said preheated antenna to produce a surface plasmon near field impinging on said magnetic media, said antenna attaining a final antenna temperature and an additional transient protrusion as a result of absorption of said optical radiation, but wherein additional DFH fly height compensation, when combined with that already produced as a result of said preheating, reduces the effects of said transient protrusion.