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US 6,643,103 B1Granted
Very high linear resolution CPP differential dual spin valve magnetoresistive head
AssigneeSeagate Technology LLC
InventorIsabel G. Trindade
Life of this patent
Estimating the term…
Abstract
A dual spin valve read head includes first and second spin valve stacks configured to operate in a current perpendicular to plane (CPP) mode. The first and the second spin valve stacks each include a free layer. A spacer is positioned adjacent the free layers of the first and the second spin valve stacks and spaces the first spin valve stack apart from the second spin valve stack.
Claims14
A read head comprising:
- first and second spit valves operating in a current perpendicular to plane(CPP) mode, the first and second spin valves each comprising a free layer;
- and
- means, positioned adjacent the free layers of the first and second spin valves, for connecting the first and second spin valves in serials such that at single CPP sense current flows serially through the first spin valve, the means for connecting the first and second spin valves in serial, and the second spin valve, and for defining a read head gap.
A read head comprising;
- first and second spin valves connected in serial and operating in a current perpendicular to plane (CPP) mode, the first and second spin valves comprising a free layer;
- and
- means, positioned adjacent the free layers of the first and second spin valves, for defining a read head gap between the first and second spin valves and for allowing a single CPP sense current to flow serially through the first spin valve, the means for defining a read head gap, and the second spin valve.
A dual spin valve read head comprising:
- a first and second spin valve stacks configured to operate in a current perpendicular to plane (CPP) mode the first and the second spin valve stacks each including a free layer;
- and
- spacer means adjacent the free layers of the first aid the second spin valve stacks for spacing the first spin valve stack apart from the second spin valve stack and for allowing a single CPP sense current to flow serially through the first spin valve stack, the spacer means, and the second spin valve stack.
Dependencies are inferred from the claim text.