Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2008-06-17
2008-06-17
Kim, Paul D (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603130, C029S603140, C029S603150, C029S603180, C216S065000, C360S122000, C360S317000, C451S005000, C451S041000
Reexamination Certificate
active
07386933
ABSTRACT:
A method for fabricating a magnetic recording head writer. The writer includes a bottom magnetic pole and a write gap formed over the bottom pole and a coil trench formed in the bottom pole. A top magnetic pole is provided as two layers with the first layer including front and back tips with spaced apart walls positioned adjacent the trench bottom defining trench sides. A pole cover layer is included that is made up of a thin layer of insulating material deposited to cover sides and bottom of the coil trench. A bottom coil is formed on the pole cover layer in the bottom of the coil trench and coil insulation is provided between coil elements and adjacent trench walls and covemg the coil. A top coil with insulation is formed over the planarized bottom coil insulation and the top pole second layer is formed over the top coil.
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Hu Yining
Krounbi Mohamad T.
Watterston Jim
Zhao Ming
Hogan & Hartson
Kim Paul D
Western Digital (Fremont) , LLC
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