US 12,469,518 B1
Recessed write gap material for enhanced bias current injection and maximizing aerial density capacity in perpendicular magnetic recording
Shehrin Sayed, Fremont, CA (US); Yue Liu, Fremont, CA (US); Wenyu Chen, San Jose, CA (US); Haowen Ren, Fremont, CA (US); Kowang Liu, Fremont, CA (US); and Yuhui Tang, Milpitas, CA (US)
Assigned to Headway Technologies, Inc., Milpitas, CA (US)
Filed by Headway Technologies, Inc., Milpitas, CA (US)
Filed on Aug. 28, 2024, as Appl. No. 18/818,344.
Int. Cl. G11B 5/09 (2006.01); G11B 5/012 (2006.01); G11B 5/187 (2006.01); G11B 5/31 (2006.01)
CPC G11B 5/3116 (2013.01) [G11B 5/012 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A write head for a disk drive, the write head comprising:
a main pole (MP) configured to provide a magnetic flux to a recording medium;
a trailing shield (TS) comprising a hot seed (HS) and write shield (WS) to collect a portion of the flux from the MP;
a write gap (WG) disposed between the MP and TS, wherein the WG comprises a non-magnetic electrically conductive material;
a side shield (SS), a leading shield (LS), and a write shield (WS) each comprising a magnetic material that prevents magnetic flux from reaching the medium bits away from the MP, wherein a length of the WG is disposed along a length of the SS and the LS and is about equal to a length of the HS;
a side gap (SG) between the MP and the SS on multiple sides of the MP, wherein the SG comprises a non-magnetic material that is a conductor or an insulator; and
a leading gap (LG) between the MP and the LS, the LG comprising a same material as the SG.