Disk drive comprising stacked and stepped traces for improved transmission line performance
AssigneeWestern Digital Technologies, Inc.
InventorWilliam Don Huber
Life of this patent
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Abstract
A disk drive is disclosed comprising a disk, a head actuated over the disk, a preamp, and an interconnect for coupling the head to the preamp. The interconnect comprises a first transmission line stacked over a second transmission line, and a dielectric between the first transmission line and second transmission line. A shape of the first and second transmission lines varies along a length of the interconnect such that the interconnect comprises an approximation of an inductor/capacitor ladder network.
Claims26
A disk drive comprising:
- a disk;
- a head actuated over the disk;
- a preamp;
- and
- an interconnect comprising a first transmission line stacked over a second transmission line, and a dielectric between the first transmission line and second transmission line, the interconnect for coupling the head to the preamp, wherein a shape of the first and second transmission lines varies along a length of the interconnect such that the interconnect comprises an approximation of an inductor/capacitor ladder network.
A suspension for use in a disk drive, the suspension comprising an interconnect comprising a first transmission line stacked over a second transmission line, and a dielectric between the first transmission line and second transmission line, the interconnect for coupling a head to a preamp, wherein a shape of the first and second transmission lines varies along a length of the interconnect such that the interconnect comprises an approximation of an inductor/capacitor ladder network.
A disk drive comprising:
- a disk;
- a head actuated over the disk;
- a preamp;
- and
- an interconnect comprising a first transmission line and a second transmission line forming an approximation of at least one inductor/capacitor ladder network and an approximation of at least one inductor/capacitor lattice network,
- wherein the interconnect comprises a substantially constant group delay over a frequency band of at least one of a read signal and a write signal.
A suspension for use in a disk drive, the suspension comprising an interconnect comprising a first transmission line and a second transmission line forming an approximation of at least one inductor/capacitor ladder network and an approximation of at least one inductor/capacitor lattice network, wherein the interconnect comprises a substantially constant group delay over a frequency band of at least one of a read signal and a write signal.
A disk drive comprising:
- a disk;
- a head actuated over the disk;
- a preamp;
- and
- an interconnect comprising a first transmission line and a second transmission line forming an approximation of at least one inductor/capacitor ladder network and an approximation of at least one inductor/capacitor lattice network,
- wherein the lattice network flattens a group delay of the interconnect.
A suspension for use in a disk drive, the suspension comprising an interconnect comprising a first transmission line and a second transmission line forming an approximation of at least one inductor/capacitor ladder network and an approximation of at least one inductor/capacitor lattice network, wherein the lattice network flattens a group delay of the interconnect.
Dependencies are inferred from the claim text.