Magnetic writing pole and a perpendicular writing element

Abstract

The writing pole is formed of a magnetic material and includes a pole tip having an air-bearing surface and a throat portion extending away from the pole tip and away from the air-bearing surface. At least two surfaces of the throat portion are non-perpendicular to the air-bearing surface.

1 . A beveled writing pole formed of a magnetic material comprising: 
 a top portion having a pole tip;    a beveled portion adjoining the top portion and having a bevel that extends from the pole tip; and    a throat portion formed of the top and beveled portions and having tapered surfaces that extend from the pole tip;    wherein the bevel increases a thickness of the writing pole proximate the pole tip, and the tapered surfaces of the throat portion increase a width of the writing pole proximate the pole tip.    
     
     
         2 . The writing pole of  claim 1 , wherein the bevel is angled at approximately forty-five degrees relative to an air-bearing surface of the pole tip.  
     
     
         3 . The writing pole of  claim 2 , wherein the tapered surfaces of the throat portion are angled at approximately seventy-five to eighty-five degrees relative to the air-bearing surface of the pole tip.  
     
     
         4 . The writing pole of  claim 1 , wherein the tapered surfaces of the throat portion are angled at approximately seventy-five to eighty-five degrees relative to an air-bearing surface of the pole tip.  
     
     
         5 . The writing pole of  claim 1 , wherein the writing pole is formed of a magnetic material selected from the group consisting of cobalt-iron (CoFe), cobalt-nickel-iron (CoNiFe), nickel-iron (NiFe) and cobalt (Co).  
     
     
         6 . A writing pole formed of a magnetic material, the writing pole comprising: 
 a pole tip having an air-bearing surface;    a throat portion extending from the pole tip and away from the air-bearing surface, wherein at least two surfaces of the throat portion are non-perpendicular to the air-bearing surface.    
     
     
         7 . The writing pole of  claim 6 , wherein the throat portion includes a first pair of opposing surfaces that diverge from each other from the pole tip.  
     
     
         8 . The writing pole of  claim 7 , wherein the throat portion includes a second pair of opposing surfaces that diverge from each other from the pole tip and are connected to the first pair of opposing surfaces.  
     
     
         9 . The writing pole of  claim 6 , wherein a width and a thickness of the throat portion, each measured in a plane that is substantially parallel to the air-bearing surface, increase with distance from the pole tip.  
     
     
         10 . The writing pole of  claim 6 , wherein one of the surfaces of the throat portion is angled at approximately forty-five degrees relative to the air-bearing surface of the pole tip.  
     
     
         11 . The writing pole of  claim 6 , wherein one of the surfaces of the throat portion is angled at approximately seventy-five to eighty-five degrees relative to an air-bearing surface of the pole tip.  
     
     
         12 . The writing pole of  claim 6 , wherein the writing pole is formed of a magnetic material selected from the group consisting of cobalt-iron (CoFe), cobalt-nickel-iron (CoNiFe), nickel-iron (NiFe) and cobalt (Co).  
     
     
         13 . A perpendicular writing element comprising: 
 a writing pole comprising a pole tip having a air-bearing surface, and a throat portion extending from the pole tip, wherein at least two surfaces of the throat portion are non-perpendicular to the air-bearing surface; and    a return pole including a pole tip that is separated from the pole tip of the writing pole by a writer gap.    
     
     
         14 . The perpendicular writing element of  claim 13 , wherein the throat portion includes a first pair of opposing surfaces that diverge from each other from the pole tip.  
     
     
         15 . The perpendicular writing element of  claim 14 , wherein the throat portion includes a second pair of opposing surfaces that diverge from each other from the pole tip and are connected to the first pair of opposing surfaces.  
     
     
         16 . The perpendicular writing element of  claim 13 , wherein a width and a thickness of the throat portion, each measured in a plane that is substantially parallel to the air-bearing surface, increase with distance from the pole tip.  
     
     
         17 . The perpendicular writing element of  claim 13 , wherein a surface area of the pole tip of the return pole is greater than the surface area of the air-bearing surface.  
     
     
         18 . The perpendicular writing element of  claim 17 , wherein the return pole is connected to the writing pole at a back gap.  
     
     
         19 . The perpendicular writing element of  claim 18 , further comprising a conducting coil encircling the back gap.  
     
     
         20 . The writing pole of  claim 13 , wherein the at least two the surfaces of the throat portion are angled at approximately forty-five degrees to eighty-five degrees relative to the air-bearing surface of the pole tip.