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US 7,342,752 B1Granted
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 magnetoresistive read head includes a magnetoresistive sensor and a bias structure adjacent to the magnetoresistive sensor. The bias structure provides a magnetostatic bias field for the magnetoresistive sensor. The bias structure includes an underlayer, a bias layer over the underlayer, and at least one dusting layer directly below at least one of the underlayer or the bias layer.
Claims36
A magnetoresistive read head comprising:
- a magnetoresistive sensor stack;
- and
- a bias structure adjacent to the magnetoresistive sensor stack, the bias structure providing a magnetostatic bias field for the magnetoresistive sensor stack, the bias structure comprising:
- an underlayer;
- a bias layer over the underlayer;
- and
- at least one 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 comprising discontinuous, nano-sized islands.
4 more elements
Dependencies are inferred from the claim text.