US 12,148,454 B2 · Magnetic recording head with stable magnetization of shields

Abstract

Aspects of the present disclosure generally relate to a magnetic recording head that includes a main pole, a leading shield, a first side shield disposed on a first side of the main pole, a second side shield disposed on a second side of the main pole, and a trailing shield. The trailing shield is disposed on a trailing side of the main pole. One or more approaches are disclosed to control return-fluxes. In some embodiments, at least one of the upper return pole, the leading shield, the trailing shield, the first side shield, and the second side shield includes a laminate structure having at least a pair of ferromagnetic layers, and a non-magnetic spacer layer disposed between adjacent ferromagnetic layers. In some embodiments, one or more shunts are positioned, such as connecting the leading shield to the upper return pole in order to create circuits to control magnetic flux.

Claims20

Dependent claims

A magnetic recording head, comprising:

a main pole;
a first side shield disposed on a first side of the main pole;
a second side shield disposed on a second side of the main pole;
a trailing shield disposed on a trailing side of the main pole;
a leading shield disposed on a leading side of the main pole;
an upper return pole disposed over the trailing shield;
a first shunt extending from the leading shield to the upper return pole;
and
a second shunt extending from the leading shield to the upper return pole, the first shunt and the second shunt being non-contiguous, wherein the first and second shunts are spaced from the trailing shield in a stripe height direction.

6 more elements

Dependencies are inferred from the claim text.

Magnetic recording head with stable magnetization of shields

Life of this patent

Magnetic recording head with stable magnetization of shields

Life of this patent

Abstract

Claims20