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US 5,476,804 AGranted
Process for producing a semiconductor field detector magnetic head
AssigneeSilmag
InventorJean-Pierre Lazzari
Life of this patent
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Abstract
Process for producing a semiconductor field detector magnetic head and head obtained by this process. On a silicon substrate (30) is produced a semiconductor sensor (32) and then the magnetic circuit of the head (36,48,50,52,54). Application to magnetic recording. (FIG. 2i)
Claims17
Process for the production of a magnetic reading head, characterized in that it comprises the following operations:
- starting with a silicon substrate (30),
- in a first phase at least one magnetic field sensitive semiconductor sensor (32) is produced on one face of said substrate (30), in a second phase formation takes place on the same substrate face and around the sensor (32) of a magnetic circuit incorporating a lower magnetic coating (36,36/1,36/2,72/1,72/2) parallel to the substrate (30), two magnetic posts (48,50,80/1, 80/2) perpendicular to the substrate (30) and an upper magnetic coating (52,84) parallel to the substrate, being on the two posts and having a head gap (54,86).
Dependencies are inferred from the claim text.