Low impedance, high bandwidth disk drive suspension circuit
AssigneeMagnecomp Corporation
InventorsChristopher Schreiber, Christopher Gene Dunn
Life of this patent
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Abstract
A low impedance, low crosstalk disk drive suspension circuit has multiple traces carrying a first polarity of a differential signal, interleaved with multiple traces carrying the second polarity of a differential signal. Each pair of conductors consisting of a trace of the first polarity and a trace of the second polarity may cross over each other at multiple crossover points. The crossover connections may utilize a second layer of copper trace conductors over the first and main layer, or alternatively the crossover connections may utilize an isolated portion of the suspension substrate.
Claims13
A circuit for a disk drive suspension, the circuit comprising:
- a suspension substrate and a first insulative layer disposed on the substrate;
- first and second signal paths comprising first and second conductors, respectively, formed on the insulative layer, the first and second paths carrying a first polarity signal of a differential signal pair;
- third and fourth signal paths comprising third and fourth conductors, respectively, formed on the insulative layer, the third and fourth paths carrying a second polarity signal of the differential signal pair, the second polarity signal being of opposite polarity from the first polarity signal;
- wherein:
- the signal paths are arranged in horizontal order at a first locus as the first path, the third path, the second path, and the fourth path, whereby the paths are arranged in horizontal order of plus, minus, plus, minus;
- the first and third signal paths each repeatedly cross the second and fourth signal paths.
Dependencies are inferred from the claim text.