Thomson-csf

Compagnie Europeenne De Composants Electroniques

Compagnie Europeene De Composants Electroniques Lcc

Jean-Luc Rolland

Paul-Louis Meunier

Jean-Claude Mage

Jean-Paul Castera

Manijeh Razeghi

Henriette Magna

Paul L Meunier

Alain Jacobelli

Maurice Penot

Jean-Marie Mackowski

Jean-Yves Beguin

Method for detection of end of grinding of a thin layer magnetic head

Video recording/play-back heads concerning rotating heads subjected to wear are disclosed. The structure of this head is such that the active part of the magnetic head as well as the drum are coated with a wear-resistant layer.

Video recording/play-back head, method for making it and apparatus

In a magnetic head, there is provided, in the gap, a superconducting material that has zero permeability and prevents the passage of the magnetic field in the gap. Various alternative embodiments are used to improve the efficiency of the head by channelling the magnetic flux outside the gap.

Magnetic recording/playback head comprising a superconducting material

In a method for making a thin-film magnetic head, there are stages for depositing hardening material in the plane of the magnetic films and in the neighbourhood of the active surface of the magnetic head. The invention also relates to a magnetic head made according to this method. The invention can be applied to thin-film magnetic heads for magnetic tape read/write devices.

Write/read head including monocrystalline magnetic thin films protected

A method of making a flat magnetic structure having coils thereon, said structure including magnetic read/write heads using a flat substrate that has at least one side made of a magnetic material, said method including the steps of:initial machining of the magnetic side of the substrate to form supporting means for conducting wires, which forms said coils, and to demarcate future magnetic poles of said magnetic read/write heads; then depositing, on either side or both sides of the substrate, connecting pins at a rate of two pins per said coil; then positioning the conducting wires on said supporting means to form the coils; then connecting the ends of the conducting wires of each coil to the corresponding connecting pins; then coating the machined magnetic side with an insulating material; and then machining and polishing the coated side until the magnetic poles are exposed.

Method for making a flat magnetic structure for read/write magnetic heads

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Paris, France

Jean-Luc Rolland