US 11,749,306 B2
Tape media having synergistic magnetic recording layer and underlayer
Richard Bradshaw, Tucson, AZ (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Aug. 27, 2021, as Appl. No. 17/459,659.
Application 17/459,659 is a continuation of application No. 16/545,963, filed on Aug. 20, 2019, granted, now 11,152,027.
Prior Publication US 2021/0390980 A1, Dec. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 5/848 (2006.01); G11B 5/716 (2006.01); G11B 5/714 (2006.01); G11B 5/702 (2006.01); G11B 5/706 (2006.01); G11B 5/712 (2006.01); G11B 5/71 (2006.01)
CPC G11B 5/848 (2013.01) [G11B 5/7023 (2013.01); G11B 5/70621 (2013.01); G11B 5/70636 (2013.01); G11B 5/70647 (2013.01); G11B 5/712 (2013.01); G11B 5/714 (2013.01); G11B 5/716 (2013.01); G11B 5/71 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic recording tape, comprising:
a substrate;
an underlayer formed above the substrate, the underlayer comprising:
first encapsulated nanoparticles each comprising a first magnetic nanoparticle encapsulated by a first aromatic polymer, and
a first polymeric binder binding the first encapsulated nanoparticles; and
a magnetic recording layer formed above the underlayer, the recording layer comprising:
second encapsulated nanoparticles each comprising a second magnetic nanoparticle encapsulated by an encapsulating layer, and
a second polymeric binder binding the second encapsulated nanoparticles.