Method for fabricating magnetoresistive read head having a bias structure with at least one dusting layer
AssigneeWestern Digital (Fremont), LLC
InventorsWei Zhang, Yingjian Chen, Satoru Araki, Mohamad T. Krounbi
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Abstract
A method of fabricating a bias structure of a magnetoresistive read head for a magnetoresistive sensor stack formed on a substrate includes forming an underlayer and forming a bias layer over the underlayer. The method further includes forming a dusting layer directly below at least one of the underlayer or the bias layer and between the bias layer and the magnetoresistive sensor stack. The dusting layer includes discontinuous, nano-sized islands.
Claims16
A method of fabricating a bias structure of a magnetoresistive read head comprising a magnetoresistive sensor stack formed on a substrate, comprising:
- forming an underlayer;
- forming a bias layer over the underlayer;
- and
- forming a dusting layer directly below at least one of the underlayer or the bias layer,
- wherein the dusting layer is between the bias layer and the magnetoresistive sensor stack, and the dusting layer comprises discontinuous, nano-sized islands,
- wherein the dusting layer is formed of a dusting layer material that has a melting temperature that is higher than a melting temperature of the underlayer.
A method of fabricating a bias structure of a magnetoresistive read head comprising a magnetoresistive sensor stack formed on a substrate, comprising:
- forming an underlayer;
- forming a bias layer over the underlayer;
- and
- forming a dusting layer directly below at least one of the underlayer or the bias layer;
- wherein the dusting layer is between the bias layer and the magnetoresistive sensor stack, and the dusting layer comprises discontinuous, nano-sized islands and,
- wherein the dusting layer is formed of a dusting layer material that comprises a material selected from the group consisting of tungsten, tantalum, niobium, rhodium, molybdenum, tungsten-titanium alloy, tungsten-chromium alloy, nickel-aluminum alloy, platinum, and titanium.
A method of fabricating a bias structure of a magnetoresistive read head comprising a magnetoresistive sensor stack formed on a substrate, comprising:
- forming an underlayer;
- forming a bias layer over the underlayer;
- and
- forming a dusting layer directly below at least one of the underlayer or the bias layer,
- wherein the dusting layer is between the bias layer and the magnetoresistive sensor stack, and the dusting layer comprises discontinuous, nano-sized islands and,
- wherein the dusting layer is formed of a dusting layer material that has a melting temperature that is higher than 1800° C.
Dependencies are inferred from the claim text.