Perspective of read heads for ultra-high recording densities and associated noise issues Online publication date: Tue, 11-Mar-2008
by Haiwen Xi, Yiming Shi, Sining Mao
International Journal of Product Development (IJPD), Vol. 5, No. 3/4, 2008
Abstract: In the paper, the authors review the Current Perpendicular-to-Plane (CPP) read heads for ultra-high recording densities. First the advantages of CPP heads over Current-in-Plane (CIP) heads are presented. Then the technologies including tunnelling magnetoresistance that has been used in read heads are discussed. Last, noise and instability issues in CPP heads associated with the specific technologies are analysed from the angles of understanding the microscopic mechanisms and of optimising the head fabrication process.
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