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PMR Write Head with Patterned Leading Edge Taper

  • US 20180330748A1
  • Filed: 05/15/2017
  • Published: 11/15/2018
  • Est. Priority Date: 05/15/2017
  • Status: Active Grant
First Claim
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1. A perpendicular magnetic recording (PMR) writer, comprising:

  • (a) a main pole with a first leading side and a trailing side, and two sides that connect the first leading side with the trailing side, the first leading side adjoins a lead gap having a front side at an air bearing surface (ABS), and the trailing side has a track width at the ABS;

    (b) the lead gap that separates the first leading side and a leading shield; and

    (c) the leading shield with a lower layer having a first cross-track width (w), and a backside at a first height (c) from a front side thereof at the ABS, and an upper layer formed on a top surface of the lower layer wherein the upper layer comprises;

    (1) a front side having the first cross-track width (w) at the ABS;

    (2) a second side contacting the lead gap, the second side is formed substantially parallel to the first leading side and has a front end at the ABS and a back end at the first height from the ABS, and wherein the second side comprises a notch that is recessed a second height (a) from the ABS and has a second cross-track width (w1) between two notch sidewalls that are equidistant from a center plane that bisects the leading shield and the main pole, and where w1<

    w, and wherein the notch has a first notch side that is formed parallel to the ABS and has a first down-track thickness, and the notch has a second notch side that extends from an end of the first notch side to a backside of the upper layer at the first height, and wherein each of the two notch sidewalls intersect the first notch side at an angle from about 90 to 170 degrees such that a distance between the two notch sidewalls at the upper layer backside is ≥

    w1 where w1 is the cross-track width at the second height; and

    (3) the backside that is aligned parallel to the ABS.

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