Magnetic head and manufacturing method therefor

Abstract

A magnetic head having optimum recording/reproducing characteristics and a method for producing the magnetic head. A pair of magnetic core halves 2, 3, each having a substrate 4 and a thin magnetic metal film 6 formed obliquely on it, are bonded together via a non-magnetic material C for defining a magnetic gap. A portion of the substrate faces a junction surface 8 of the magnetic core halves 2, 3. The substrate portion is arranged for facing an end face of the magnetic meta film 6 of the opposite side magnetic core half facing the junction surface 8.

What is claimed is:  
     
         1 . A magnetic head in which a pair of magnetic core halves, each having a substrate and a magnetic metal film formed obliquely thereon, are bonded together via a non-magnetic material for defining a magnetic gap, characterized in that 
 a portion of the substrate faces the junction surface of the magnetic core halves, said substrate portion being arranged for facing an end face of the magnetic meta film of the opposite side magnetic core half facing the junction surface.    
     
     
         2 . The magnetic head as claimed in    claim 1    wherein said substrate is formed of a non-magnetic material.  
     
     
         3 . The magnetic head as claimed in    claim 1    wherein an underlying layer is provided between said substrate and said magnetic metal film.  
     
     
         4 . The magnetic head as claimed in    claim 3    wherein said underlying layer is colored differently from the substrate and the thin magnetic metal film.  
     
     
         5 . The magnetic head as claimed in    claim 1    wherein said thin magnetic metal film is made up of plural magnetic metal layers layered via non-magnetic layers.  
     
     
         6 . The magnetic head as claimed in    claim 5    wherein said the uppermost one of the plural magnetic metal layers is thinner in film thickness than other magnetic metal layers.  
     
     
         7 . The magnetic head as claimed in    claim 1    wherein said thin magnetic metal film has a portion in the vicinity of the junction surface cut out so that the film is progressively reduced in thickness towards the junction surface.  
     
     
         8 . The magnetic head as claimed in    claim 1    wherein at least one of the thin magnetic metal films is formed on an abutting surface to the other thin magnetic metal film with a coil-forming recess in which is formed a coil formed by the thin film forming process.  
     
     
         9 . A method for producing a magnetic head in which a pair of magnetic core halves, each having a substrate and a thin magnetic metal film formed obliquely thereon, are bonded together via a non-magnetic material for defining a magnetic gap, comprising: 
 obliquely forming a thin magnetic metal film on the substrate and subsequently grinding the junction surface for exposing the substrate on the unction surface; and    bonding the magnetic core halves so that a portion of one of the substrates facing the junction surface faces the end face of the thin magnetic metal film of the other magnetic core half facing the junction surface.    
     
     
         10 . The method for producing a magnetic head as claimed in    claim 9    wherein said substrate is formed of a non-magnetic material.  
     
     
         11 . The method for producing a magnetic head as claimed in    claim 9    wherein an underlying layer is formed between the substrate and the thin magnetic metal film and the magnetic core halves are bonded together with this underlying layer and the end face of the thin magnetic metal film as reference.  
     
     
         12 . The method for producing a magnetic head as claimed in claim  9  wherein said thin magnetic metal film is made up of plural magnetic metal layers layered together with non-magnetic layers in-between.  
     
     
         13 . The method for producing a magnetic head as claimed in    claim 12    wherein an uppermost one of the plural magnetic metal layers is thinner in film thickness.  
     
     
         14 . The method for producing a magnetic head as claimed in    claim 12    wherein the magnetic core halves are abutted to each other with the second upper one of the plural magnetic metal layers formed on one of the magnetic core halves and the lowermost one of the magnetic metal layers formed on the other magnetic core half as reference.  
     
     
         15 . The method for producing a magnetic head as claimed in    claim 9    wherein said magnetic metal layer is ground so as to have a portion thereof in the vicinity of the junction surface cut out so that the film is progressively reduced in thickness towards the junction surface.  
     
     
         16 . The method for producing a magnetic head as claimed in    claim 9    wherein at least one of the thin magnetic metal films is formed on a abutting surface to the other thin magnetic metal film with a coil-forming recess in which is formed a coil formed by the thin film forming process.