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US 6,335,846 B1Granted
Vertical magnetic head having a magnetic circuit with a non-embedded part and having an integrated coil surrounding the non-embedded part
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Magnetic head for use in magnetic recording and including an integrated coil having at least one winding around a non-embedded part of the magnetic circuit. The winding includes a lower sheet of conductors placed in a chamber etched in the substrate and which is integrated into this substrate. The magnetic head is manufactured in a process including forming on a solid substrate a magnetic circuit with a first and second polar part having embedded portions positioned side by side and separated by a nonmagnetic air gap. The magnetic circuit includes at least one non-embedded bridging part no portion of which is embedded in the substrate. A conductor coil is formed around the non-embedded part of the circuit by making a lower sheet of conductors passing underneath the non-embedded bridging part and by embedding the lower sheet in at least one chamber made in the substrate, and by making an upper sheet of conductors astride the non-embedded bridging part of the magnetic circuit.
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