US 11,894,028 B2
Magnetic recording head with trailing shield having multiple throat-heights
Quan-Chiu Harry Lam, San Jose, CA (US); Mark H. Burkhardt, San Jose, CA (US); and El-Amine Salhi, Fremont, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Dec. 16, 2022, as Appl. No. 18/082,730.
Application 18/082,730 is a division of application No. 17/324,679, filed on May 19, 2021, granted, now 11,657,837.
Prior Publication US 2023/0118634 A1, Apr. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 5/31 (2006.01); G11B 5/11 (2006.01); G11B 5/127 (2006.01)
CPC G11B 5/3116 (2013.01) [G11B 5/11 (2013.01); G11B 5/1278 (2013.01); G11B 5/315 (2013.01); G11B 5/3146 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic recording head, comprising:
a main pole; and
a trailing shield disposed adjacent to the main pole, the trailing shield comprising:
a recessed edge disposed adjacent to the main pole;
a media facing surface disposed opposite the recessed edge, the media facing surface being substantially planar;
a central portion disposed adjacent to the main pole having a first throat height defined between a first surface of the recessed edge and the media facing surface; and
at least one outer portion disposed adjacent to the central portion, the at least one outer portion having a second throat height defined between a second surface of the recessed edge and the media facing surface, wherein the second throat height is less than the first throat height such that the trailing shield is tapered along the recessed edge in a cross-track direction from the central portion towards the at least one outer portion.