Metal working – Method of mechanical manufacture – Shaping one-piece blank by removing material
Reexamination Certificate
2006-01-24
2006-01-24
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Shaping one-piece blank by removing material
C029S459000, C029S527100, C204S192120, C204S298160, C204S298370
Reexamination Certificate
active
06988306
ABSTRACT:
Provided is a method of forming ferromagnetic sputter targets and sputter target assemblies having a uniform distribution of magnetic leakage flux. The method includes providing a ferromagnetic sputter workpiece and hot rolling the workpiece to a substantially circular configuration sputter target; machining a taper in a surface of the sputter target to have a thickness gradient of the sputter target, where the center of the sputter target is about 0.020 to about 0.005 inches thinner than the edge of the sputter target, and where the magnetic leakage flux across the sputter target is uniformly distributed.
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Gilman Paul S.
Koenigsmann Holger J.
Ward Ivan
Bryant David P.
Kenny Stephen
Praxair Technology Inc.
Schwartz Iurie A.
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