×

Ultimate double yoke (uDY) combined with one turn coil designs for perpendicular magnetic recording (PMR)

  • US 10,643,640 B1
  • Filed: 01/23/2019
  • Issued: 05/05/2020
  • Est. Priority Date: 01/23/2019
  • Status: Active Grant
First Claim
Patent Images

1. A perpendicular magnetic recording (PMR) writer structure comprised of a first PMR writer, the first PMR writer comprises:

  • (a) a main pole layer (MP) that has a top surface contacting a top yoke (TY), and a bottom surface adjoining a tapered bottom yoke (tBY), and a main pole (MP) tip at an air bearing surface (ABS);

    (b) a bucking coil below the MP, and a driving coil above the MP that are configured in a 1+1T coil design;

    (c) a trailing shield structure comprised of a hot seed (HS) layer and overlying write shield (WS) at the ABS, and an uppermost (PP3) trailing shield (TS) with a middle portion having a top surface that arches over the driving coil, and wherein the PP3 TS has a front portion that contacts a top surface of the WS, and a back portion that adjoins a top surface of the TY; and

    (d) the TY with a configuration, comprising;

    (1) a front portion having a backside below an inner corner of the PP3 TS back portion and at a yoke length (YL) from the ABS, and wherein a front side thereof is at a first height (TYd) from the ABS, and is below the driving coil; and

    (2) a back portion with a front side adjoining the TY front portion backside and wherein both of the TY back portion and TY front portion have a thickness t, and the TY back portion has a top surface that adjoins the PP3 TS back portion.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×