Patent ID: 11875825
Assignee: HEADWAY TECHNOLOGIES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 13:
14. A write head comprising:
(a) a main pole layer (MP) having a MP tip formed between a hot seed (HS) layer in a trailing shield structure, and a leading shield (LS) at an air bearing surface (ABS), and configured so that a write current passing through a driving coil and a bucking coil generates a magnetic flux that passes through the MP tip and is used to write one or more magnetic bits in a magnetic medium;
(b) a trailing loop for a return of the magnetic flux to the MP that comprises the HS layer, a write shield (WS) on the HS layer, an uppermost (PP3) trailing shield (TS), and a top yoke (TY) on a MP back portion;
(c) one or both of a first non-magnetic (NM) metal layer formed in a write gap (WG) on a MP trailing side, and a second NM metal layer in a side gap (SG) that adjoins each MP side to establish an electrical connection between the MP tip and one or both of the HS layer and side shields (SS), respectively; and
(d) a first insulation layer formed between the TY and PP3 TS to electrically isolate the MP back portion from the trailing loop,
wherein the MP and the WS are electrically connected to the driving coil and one or two built-in series resistors to form a second electric current path in parallel with the driving coil through the MP tip.