Magnetic recording head and fabrication process

Abstract

Disclosed are a thin-film magnetic recording head suitable for high density recording and its fabrication method elaborated to avoid corrosion of the main pole section of the head. A non-magnetic metal layer is formed on the top of the main pole.

1 . A magnetic head comprising a single pole type head which includes a main pole and a return pole, wherein said main pole is composed of a magnetic layer on which a non-magnetic metal layer is formed and a non-magnetic insulator layer is formed on said non-magnetic metal layer.  
   
   
       2 . The magnetic head according to  claim 1 , wherein said main pole is composed of a FeCo layer, a CoNiFe layer, or a multilayered film consisting of FeCo and non-magnetic layers.  
   
   
       3 . The magnetic head according to  claim 1 , wherein said non-magnetic metal layer is made of NiCr, Cr, Ta, or TaW and said non-magnetic insulator layer is made of Al 2 O 3 .  
   
   
       4 . The magnetic head according to  claim 1 , wherein said non-magnetic metal layer has a thickness falling within a range of 5-30 nm.  
   
   
       5 . The magnetic head according to  claim 1 , wherein said main pole has an air-bearing surface of a trapezoid shape and said non-magnetic metal layer is formed on the surface of one of parallel sides, which is longer, of the trapezoid.