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US 5,645,917 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 non-magnetic support having provided thereon at least one lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and at least one upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which is coated while said lower non-magnetic layer is wet, wherein said 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 said upper magnetic layer and lower non-magnetic layer is not more than d/2.
Dependencies are inferred from the claim text.