Patent ID: 10490210

Abstract:
A PMR writer is disclosed with a leading shield in which a lower (LS2) layer, a middle LS1 layer, and an upper leading edge taper (LET) layer have a damping parameter≥0.04, and extend from an air bearing surface (ABS) to a first height (h1) from the ABS. The LS2 layer has a notch filled with dielectric material at the air bearing surface (ABS) that extends to a height≤h1, or may be completely replaced with dielectric material. Two notch front sides each form an angle β with the LS1 bottom surface, and two notch inner sides between the ABS and LS2 backside form angle δ with the ABS where each of β and δ is from 10 degrees to 170 degrees. Accordingly, bits per square inch performance is improved while substantially maintaining tracks per square inch capability for an overall gain in area density capability.