Quantum Corporation

Maxtor Corporation

Arun Balakrishnan

Stephen Paul Williams

Christopher Montgomery Carpenter

Bruce Douglas Buch

John B Shaw

Gregory Peter Hertrich

John VanLaanen

William R Akin, Jr

Doug Gunther

Leo Lopez

Mark Sheppard

Claud L Blevins

A disk drive having reduced electromagnetic emission quasi-peaks is provided. The repetition rate of servo blocks or data is reduced, spread or otherwise altered. In one embodiment, the number of data zones is increased to achieve an emissions reduction goal. In one embodiment, the disk drive is configured to effectively have one track per zone. In one embodiment, the rotation rate of the disk is varied or the effective data bit density, as detected by the read/write head, is otherwise varied. In one embodiment, servo-sectors are intentionally positioned to vary the length, along the track, of inter-servo intervals.

Reduction of high-frequency electromagnetic emission quasi-peaks from disk drives

A tall-electrode trace interconnect array includes a dielectric support substrate for supporting least two tall-electrode trace conductors. A dielectric support structure on the support substrate supports outside longitudinal walls of the two tall-electrode trace conductors. The dielectric support structure is formed to be absent from a longitudinal space between the two tall-electrode trace conductors thereby defining an ambient air dielectric to reduce and control inter-electrode capacitance and increase resonant frequency and effective electrical bandwidth of the trace interconnect array. A method for forming the array is also disclosed.

Trace interconnect array having increased bandwidth by selective etching of traces and dielectric substrate

A flexible multi-channel trace interconnect array has a head end for electrically connecting write and read trace pairs respectively to write and read elements of a data transducer head, a body formed of a flexible dielectric material and carrying the write and read trace pairs, and at least one circuit end for connecting the write and read trace pairs respectively to write driver and read preamplifier circuits of a data storage device. Each trace pair includes two trace conductors each having a trace width, and an inter-conductor separation space. Adjacent trace pairs are separated by an inter-pair space having a width greater than, and preferably two to twenty times greater than the inter-conductor separation space in order to decouple adjacent channel pairs.

Flexible trace interconnect array for multi-channel tape head

A conductor trace array includes an electrically insulative support substrate and a plurality of pairs of electrical signal conductor traces and a plurality of pairs of passive electrical conductor traces. All of the traces are formed along substantially parallel paths in a single layer on the substrate. Each pair of the electrical signal conductor traces is arranged on the support substrate such that they are positioned in a space defined between each pair of passive electrical conductor traces. As a result, each pair of signal conductor traces has a passive electrical conductor trace positioned immediately adjacent thereto. The passive conductor traces generally follow a geometry of the signal conductor traces and thereby form a capacitive coupling relationship therebetween. This capacitive coupling relationship increases the characteristic impedance of the signal conductor traces. A preferred application is for interconnecting a head and a preamplifier/drive circuit within a hard disk drive, wherein the interconnecting trace is expressly provided upon an E-block of the activator.

Conductor trace array having passive stub conductors

A trace conductor array includes an electrically insulative support substrate and a plurality of electrical signal trace conductors formed along substantially parallel paths in a single layer on the substrate. The electrical signal trace conductors each have a plurality of spaced apart trace conductor segments. Passive electrical trace conductors are formed on the substrate in spaces between the spaced apart adjacent trace conductor segments, and are spaced apart and electrically isolated therefrom. The passive trace conductors generally follow a geometry of the spaced apart segments and thereby repel magnetic flux lines at higher frequencies and result in decoupling of the high frequency current-carrying conductor trace segments. A preferred application is for interconnecting a head and a preamplifier/drive circuit within a hard disk drive.

Conductor trace array having interleaved passive conductors

A head suspension has an integrated multi-layer trace conductor array for supporting and electrically interconnecting a read/write head to electronic circuitry in a disk drive. The electrical micro strip transmission line characteristics of the conductor array is controlled by the selective placement and connection of the trace paths within the multiple layers in order to control and balance electrical parameters including array inductance, inter-trace capacitance, and trace capacitance to a ground plane. The ground plane may further comprise a solid sheet of material or an arrangement of grounded traces disposed in proximity to signal-carrying traces of the micro strip transmission line in order to control and obtain desired electrical characteristics.

Multi-layered integrated conductor trace array interconnect structure

A head suspension has a segmented trace conductor array for electrically interconnecting a read/write head to electronic circuitry in a disk drive. Each trace segment has a predetermined generally rectangular cross-sectional area such that the intermediate first segment has a predetermined cross-sectional width greater than a predetermined cross-sectional width of an first outer segment, in order to optimize current density at very high signaling frequencies associated with information transfer between the head and the read/write circuitry.

Suspension with integrated conductor trace array having optimized

A head suspension has an integrated multi-layer trace conductor array for supporting and electrically interconnecting a read/write head to electronic circuitry in a disk drive. The trace conductor array includes an integrally formed electrical shield which may be grounded or ungrounded and formed to have a depth greater than a skin effect depth at a frequency of an interfering wave front.

Suspension with biaxially shielded conductor trace array

A head suspension has an integrated self-shielding trace conductor array for supporting and electrically interconnecting a dual element read/write head to electronic circuitry in a disk drive. Write traces are placed proximately to the read traces and are grounded during data reading operations in order to serve as a read trace electrostatic shield during the data reading operations.

Growing community of inventors

Lafayette, CO, United States of America

Arun Balakrishnan