Thin-film laminated magnetic heads of Fe-Si-Al alloy
AssigneeNippon Mining Co., Ltd.
InventorsKazuhiro Saito, Taiichi Mori
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Abstract
A magnetic film of Fe-Si-Al alloy comprises a substrate and an Fe-Si-Al alloy film in which argon is entrapped. A thin-film laminated magnetic head comprises a pair of opposed substrates, and alternately laminated Fe-Si-Al alloy films entrapping argon therein and non-magnetic insulating films between the substrates. In the magnetic film and the head the substrates have a thermal expansion coefficient lower than that of the Fe-Si-Al alloy films and the amount of argon entrapped in the alloy films is controlled within the range of about 0.01 to about 0.3 wt. % so that internal stresses in the alloy films are substantially zeroed.
Claims3
A thin-film laminated magnetic head comprising a pair of half blocks which are mated and bonded through a non-magnetic gap spacer, at least one of the half blocks formed with a groove for receiving coil winding, each of said half blocks having a pair of opposed substrates, and alternately laminated Fe-Si-Al alloy films and non-magnetic insulating films therebetween and entrapping in each alloy film an amount of argon ranging between about 0.01 to about 0.3 wt % based upon the weight of the alloy film, so that internal stresses in said alloy films are substantially zeroed said substrates having a thermal expansion coefficient lower than that of said Fe-Si-Al alloy films.
Dependencies are inferred from the claim text.