Read head for a turntable
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorRomain LIECHTI
Life of this patent
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Abstract
A read head comprising an electromechanical microsystem comprising: a stylus to engage with the microgroove of the LP record, a primary microbeam at a first of which the stylus is mounted, a first electromechanical transduction device extending from a second end of the primary microbeam, opposite the first end, and a second electromechanical transduction device extending from the second end of the primary microbeam. The first and second electromechanical transduction devices making it possible to convert a movement of the stylus into a first electric signal and a second electric signal, respectively for a first audio channel and a second audio channel.
Claims14
A read head for a turntable, the read head being obtained from a trench formed of a stack comprising a first silicon-based layer, a second electrically isolating silicon oxide layer on the first layer and a third superficial layer on the second silicon oxide layer, the read head comprising an electromechanical microsystem comprising:
- a stylus with a basis of a material of the superficial layer to engage with a microgroove of an LP record,
- a silicon-based primary microbeam, and at a first end of which the stylus is mounted,
- a first silicon-based electromechanical transduction device, and extending from a second end of the primary microbeam, opposite the first end, and
- a second silicon-based electromechanical transduction device, and extending from the second end of the primary microbeam, wherein
- the stylus is mechanically connected with the primary microbeam the first electromechanical transduction device, and the second electromechanical transduction device by the second silicon oxide layer, and
- the first electromechanical transduction device and the second electromechanical transduction device converting a movement of the stylus in the microgroove of the LP record respectively into a first electric signal and a second electric signal, respectively for a first audio channel and a second audio channel.
A method for manufacturing a read head for a turntable, comprising:
- providing a trench formed of a stack comprising a first silicon-based layer, a second electrically isolating silicon oxide layer on the first layer and a third superficial layer on the second silicon oxide layer, and
- etching the trench to obtain the read head,
- wherein a stylus of the read head is etched in the superficial layer, and first and second electromechanical transduction devices of the read head are etched in the first layer,
- wherein a primary microbeam at a first end of which the stylus is mounted, is etched in the first layer,
- the first electromechanical transduction device extends from a second end of the primary microbeam, opposite the first end, and
- the second electromechanical transduction device extends from the second end of the primary microbeam.
Dependencies are inferred from the claim text.