Magnetic recording medium and process for producing the same
AssigneeFuji Photo Film Co., Ltd.
InventorKazuyuki Usuki
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Abstract
A magnetic recording medium comprises a non-magnetic substrate and a magnetic layer, which is constituted of a thin ferromagnetic metal film and is overlaid upon at least either one of the surfaces of the non-magnetic substrate. A prime-coating layer, which has alkyl chains linked by an ether linkage to each other in a polysiloxane, is formed between the non-magnetic substrate and the thin ferromagnetic metal film. The magnetic recording medium is capable of being produced easily and at a low cost. The prime-coating layer has smooth surface characteristics, is free from deterioration of surface characteristics and the occurrence of cracking even during the formation of a magnetic layer thereon with a sputtering process, and causes no blocking to occur.
Claims8
A magnetic recording medium comprising a non-magnetic substrate and a magnetic layer, which is constituted of a thin ferromagnetic metal film and is overlaid upon at least either one of the surfaces of the non-magnetic substrate, wherein a prime-coating layer, which has alkyl chains linked by an ether linkage to each other in a polysiloxane, is formed between the non-magnetic substrate and the thin ferromagnetic metal film.
A process for producing a magnetic recording medium, comprising the steps of:
- i) applying a coating composition, which contains a solution of a silane coupling agent, that contains an organic residue having an epoxy group, onto a non-magnetic substrate, and
- ii) heating the applied coating composition such that the applied coating composition may be dried and such that the silane coupling agent may be polymerized, whereby a prime-coating layer is formed on the non-magnetic substrate.
Dependencies are inferred from the claim text.