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EP0407244A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for producing planar magnetic heads by making cells in a non-magnetic board, and magnetic heads obtained by such a process

Assignee: Thales SA
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Filing: 1990-06-15
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Granted: —
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Expires: 2010-06-15
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Abstract

Abstract Translated from French Le domaine considéré est celui de la fabrication simultanée d'une pluralité de têtes planaires magnétiques sur une plaquette ou une galette en matériau non magnétique destinée à être découpée pour séparer chaque tête. Le procédé s'applique aux têtes magnétiques du type comprenant une micro-ouverture formée entre deux pôles magnétiques, en regard d'un entrefer défini entre deux noyaux de ferrite bobinés. Ce procédé consiste à déposer lesdits pôles magnétiques en couche mince sur une première face d'une plaquette (40) en matériau non magnétique, et à dégager dans la face opposée de ladite plaquette au moins une alvéole de logement desdits noyaux bobinés (72), de façon à obtenir un espacement calibré ou une jonction entre la partie supérieure de chacun desdits noyaux bobinés et lesdits pôles magnétiques en couche mince. The field considered is that of the simultaneous manufacture of a plurality of planar magnetic heads on a wafer or a wafer of non-magnetic material intended to be cut to separate each head. The method applies to magnetic heads of the type comprising a micro-opening formed between two magnetic poles, facing an air gap defined between two coils of ferrite coils. This method consists in depositing said magnetic poles in a thin layer on a first face of a plate (40) made of non-magnetic material, and in releasing in the opposite face of said plate at least one cell for housing said wound cores (72), so as to obtain a calibrated spacing or a junction between the upper part of each of said wound cores and said magnetic thin film poles.

Inventors

  • 👤 Paul-Louis Meunier
  • 👤 Jean-Marc Coutellier
  • 👤 Jean-Claude Lehureau

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 04:59
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/133; G11B5/31; G11B5/3176; G11B5/3179; G11B5/3183; G11B5/1272; G11B5/187; G11B5/1871; G11B5/3103; G11B5/3163; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49043; Y10T29/49055; Y10T29/4906; Y10T29/49066

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

EP0262028A1 Cited
FR2605783A1 Cited

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