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US 5,827,600 AGranted
Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsKiyomi Ejiri, Hiroo Inaba, Shinji Saito, Satoru Hayakawa
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AssigneeFuji Photo Film Co., Ltd.
InventorsKiyomi Ejiri, Hiroo Inaba, Shinji Saito, Satoru Hayakawa
Estimating the term…
A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 .mu.m and an average thickness variation (.sup..DELTA. d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.
A magnetic recording medium comprising a support having provided thereon in sequence at least a lower layer comprising a binder and a non-magnetic powder and an upper magnetic layer over the lower layer, the upper magnetic layer comprising a binder and a ferromagnetic powder, wherein said upper magnetic layer has a dry thickness of not more than 1 .mu.m, and there is no mixed region between said lower layer and said upper magnetic layer.
Dependencies are inferred from the claim text.