Patent ID: 8184395
Filing Date: 2012-05-22
Classification: B82Y,G11B

Abstract:
1. A magnetic recording and reproducing apparatus with a thin-film magnetic head having microwave magnetic exciting function, comprising: a metal housing; a magnetic recording medium, arranged in said metal housing, having a magnetic recording layer; a thin-film magnetic head, arranged in said metal housing, having a write magnetic field production means and a resonance magnetic field production means, said write magnetic field production means producing, in response to a write signal, a write magnetic field to be applied into said magnetic recording layer, said resonance magnetic field production means producing, in response to a microwave excitation signal, a resonance magnetic field with a frequency equal to or in a range near a ferromagnetic resonance frequency F a write signal generation means, arranged in said metal housing, for generating the write signal; a microwave signal generation means, arranged in said metal housing, for generating the microwave excitation signal; a transmission means, arranged in said metal housing, for feeding the microwave excitation signal generated by said microwave signal generation means to said resonance magnetic field production means in said thin-film magnetic head and for feeding the write signal generated by said write signal generation means to said write magnetic field production means in said thin-film magnetic head; and a plurality of metal ribs, arranged in said metal housing, for forming a plurality of cavities, each of said plurality of cavities having a rectangular horizontal section shape in the metal housing and having dimensions of any side of each cavity to produce no resonance in the metal housing at a frequency of said microwave excitation signal.