Recording and reproducing separation type magnetic head having thin part in upper core or magnetic film and magnetic storage apparatus using the same

Abstract

A recording and reproducing separation type magnetic head has a recording head with an upper core and a lower core that writes information on a magnetic disk and a reproducing head with an upper magnetic film and a lower magnetic film, as sealed layers, that reads the information from the magnetic disk. A thickness of the upper part of the upper core is less than a thickness of the tip minute of the upper core. The magnetic head has excellent overwriting performance and achieves high speed transfer.

1 . A recording and reproducing separation type magnetic head which comprises: 
 a recording head which has an upper core, and an upper magnetic film as a lower core, writes information on a magnetic disk;    a reproducing head which has an upper magnetic film and a lower magnetic film, as sealed layers, reads the information from the magnetic disk,    wherein the thickness of the upper part of the upper core is less than the thickness of the tip minute of said upper core.    
     
     
         2 . A recording and reproducing separation type magnetic head which comprises: 
 a recording head which has an upper core, and an upper magnetic film as a lower core, writes information on a magnetic disk;    a reproducing head which has an upper magnetic film and a lower magnetic film, as sealed layers, reads the information from the magnetic disk,    wherein the thickness of the tip minute of the upper magnetic film is thicker than the thickness of the other part of said upper magnetic film.    
     
     
         3 . A recording and reproducing separation type magnetic which comprises: 
 a recording head which has an upper core, and an upper magnetic film as a lower core of said recording head, writes information on a magnetic disk,    a reproducing head which has an upper magnetic film and a lower magnetic film, as sealed layers, reads the information from the magnetic disk,    wherein the thickness of the tip minute of the upper magnetic film is thicker than the thickness of the other part of said upper magnetic film, and the thickness of the tip minute of the upper magnetic film is thicker than the thickness of the other part of said upper magnetic film.    
     
     
         4 . A magnetic recording apparatus which comprises: 
 a magnetic recording medium which has a recorded plane of information and rotatable;    a driving means which rotates the magnetic recording medium in high speed;    a slider which has a magnetic head writing information on a magnetic disk and reading information from the magnetic disk and moving in the recorded plane of said magnetic recording medium;    an actuator which positions the magnetic head for the fixed position on said magnetic recording medium in the high speed;    a control means for control of rotation drive of the drive means, control of the transfer of the said actuator and control of reading or writing information of said head,    wherein the thickness of the upper part of the upper core is less than the thickness of the tip minute of said upper core.    
     
     
         5 . A magnetic recording apparatus which comprises: 
 a magnetic recording medium which has a recorded plane of information and rotatable;    a driving means which rotates the magnetic recording medium in high speed;    a slider which has a magnetic head writing information on a magnetic disk and reading information from the magnetic disk and moving in the recorded plane of said magnetic recording medium;    an actuator which positions the magnetic head for the fixed position on said magnetic recording medium in the high speed;    a control means for control of rotation drive of the drive means, control of the transfer of the said actuator and control of reading or writing information of said head,    wherein the thickness of the tip minute of the upper magnetic film is thicker than the thickness of the other part of said upper magnetic film.    
     
     
         6 . A magnetic recording apparatus which comprises: 
 a magnetic recording medium which has a recorded plane of information and rotatable;    a driving means which rotates the magnetic recording medium in high speed;    a slider which has a magnetic head writing information on a magnetic disk and reading information from the magnetic disk and moving in the recorded plane of said magnetic recording medium;    an actuator which positions the magnetic head for the fixed position on said magnetic recording medium in the high speed;    a control means for control of rotation drive of the drive means, control of the transfer of the said actuator and control of reading or writing information of said head,    wherein the thickness of the tip minute of the upper magnetic film is thicker than the thickness of the other part of said upper magnetic film, and the thickness of the tip minute of the upper magnetic film is thicker than the thickness of the other part of said upper magnetic film.