US 11,810,605 B2
Magnetic recording media with tungsten pre-seed layer
Kai Tang, San Jose, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Sep. 29, 2021, as Appl. No. 17/488,703.
Prior Publication US 2023/0099090 A1, Mar. 30, 2023
Int. Cl. G11B 5/667 (2006.01); G11B 5/84 (2006.01); G11B 5/73 (2006.01)
CPC G11B 5/667 (2013.01) [G11B 5/737 (2019.05); G11B 5/7379 (2019.05); G11B 5/8404 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A magnetic recording medium comprising:
a rigid substrate;
a pre-seed layer on the rigid substrate, the pre-seed layer comprising W and an oxide of W, wherein a resistivity of the pre-seed layer is 12×10−8 ohm meter (Ω·m) or less, and the pre-seed layer comprises at least 95 atomic percent of W;
an amorphous soft magnetic underlayer (SUL) on the pre-seed layer;
a seed layer on the amorphous SUL; and
a magnetic recording layer (MRL) on the seed layer.