Shield Design for Enhanced Reader Resolution

We propose a shield design that enhances linear resolution at a given shield-to-shield spacing. Patterning tabs in the cross-track direction of the shields at the read gap introduces a transverse anisotropy that can be further enhanced by using a high-moment material in the shield near the sensor. We use a finite element micromagnetic code to explore the performance of a read head embodying this design. We study the dependence of resolution on both the thickness and the moment of the shield tabs. The increased shield rotation improves the sensor's linear resolution by more than 2% in absolute terms.