Method of forming a magnetic read/write head

US7770285B2 · kind B2 · utility

Assignee

• Hitachi Global Storage Technologies Netherlands B.V. · NL

Inventors

• Christian Rene Bonhote · San Jose, US
• Malika D. Carter · San Jose, US
• David A. Dudek · San Jose, US
• Wen-Chien David Hsiao · San Jose, US
• John W. Lam · San Jose, US
• Vladimir Nikitin · Campbell, US

Key dates

• Filing date: Mar 28, 2008
• Grant date: Aug 10, 2010
• Expiry date: Aug 2, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49052
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A magnetic read/write head is produced with an insert layer between the substrate and the magnetic transducer. The insert layer has a lower coefficient of thermal expansion than the substrate, which reduces the temperature pole tip recession (T-PTR) of the head because the insert layer is an intervening layer between the substrate and magnetic transducer. The insert layer is produced by plating, e.g., an Invar layer over the substrate prior to fabricating the magnetic transducer. The Invar layer is annealed and the structure planarized prior to depositing a non-magnetic gap layer followed by the fabrication of the magnetic transducer.