Perpendicular magnetic recording writer pole with leading and trailing bevel side wall angles at air bearing surface
View Patent ↗A perpendicular magnetic recording transducer with leading and trailing bevel side wall angles at air bearing surface for use in a data storage device is provided. The transducer includes a magnetic writer pole having a pole tip facing an air bearing surface (ABS). The pole tip includes a pole tip face having a leading edge, a trailing edge, a first side wall, and a second side wall. The first side wall includes a first side wall section adjoining the leading edge and a second side wall section adjoining the trailing edge. The first side wall section is at a first angle measured from a perpendicular center line dividing the trailing edge. The second side wall section is at a second angle measured from a perpendicular center line dividing the trailing edge. The second angle is greater than three degrees. The first angle is greater than the second angle.
1. A recording transducer for use in a data storage device, the transducer comprising a magnetic writer pole, the magnetic writer pole having a pole tip facing an air bearing surface (ABS);
the pole tip comprising a pole tip face at the ABS;
the pole tip face comprising a leading edge, a trailing edge, a first side wall, and a second side wall;
the first side wall comprising a first side wall section adjoining the leading edge and a second side wall section adjoining the trailing edge, wherein:
the first side wall section is at a first angle (α 1 ) measured from a perpendicular center line dividing the trailing edge;
the second side wall section is at a second angle (α 2 ) measured from a perpendicular center line dividing the trailing edge, the second side wall section adjoining and sharing an edge with the first side wall section;
the second angle (α 2 ) is greater than approximately three degrees, and
the first angle (α 1 ) is greater than the second angle (α 2 ).
2. The magnetic recording transducer in claim 1 , wherein:
the first side wall section and the second side wall section adjoin approximately one-half the distance between the leading edge and the trailing edge.
3. The magnetic recording transducer in claim 1 , wherein:
the first side wall section and the second side wall section adjoin at a distance between approximately forty percent and sixty percent of the distance between the leading edge and the trailing edge.
4. The magnetic recording transducer in claim 1 , wherein:
the first side wall section and the second side wall section are approximately equal in length.
5. The magnetic recording transducer in claim 1 , wherein:
the first angle (α 1 ) is between 12 and 20 degrees.
6. The magnetic recording transducer in claim 1 , wherein:
the first angle (α 1 ) is between approximately 16 and 18 degrees.
7. The magnetic recording transducer in claim 1 , wherein:
the second angle (α 2 ) is between approximately 3 and 6 degrees.
8. The magnetic recording transducer in claim 1 , wherein:
the first angle (α 1 ) is between approximately 16 and 18 degrees;
the second angle (α 2 ) is between approximately 3 and 6 degrees;
the first side wall section and the second side wall section adjoin at a distance between approximately forty percent and sixty percent of the distance between the leading edge and the trailing edge.
9. The magnetic recording transducer in claim 1 , wherein:
the distance from the leading edge to the trailing edge is between approximately 60 and 120 nanometers.
10. The magnetic recording transducer in claim 1 , wherein:
the first side wall and the second side wall are substantially symmetric with respect to a perpendicular center line dividing the trailing edge.
11. A disk drive comprising:
a slider including a magnetic transducer, the magnetic transducer including:
a writer pole, the writer pole having a pole tip facing an air bearing surface (ABS);
the pole tip comprising a pole tip face at the ABS;
the pole tip face comprising a leading edge, a trailing edge, a first side wall, and a second side wall;
the first side wall comprising a first side wall section adjoining the leading edge and a second side wall section adjoining the trailing edge, wherein:
the first side wall section is at a first angle (α 1 ) measured from a perpendicular center line dividing the trailing edge;
the second side wall section is at a second angle (α 2 ) measured from a perpendicular center line dividing the trailing edge, the second side wall section adjoining and sharing an edge with the first side wall section, and
the second angle (α 2 ) is greater than approximately three degrees, and
the first angle (α 1 ) is greater than the second angle (α 2 ).
12. The disk drive in claim 11 , wherein:
the first side wall section and the second side wall section adjoin approximately one-half the distance between the leading edge and the trailing edge.