×

Magnetic recording medium

  • US 5,496,607 A
  • Filed: 11/25/1994
  • Issued: 03/05/1996
  • Est. Priority Date: 04/14/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. A magnetic recording medium, comprising a non-magnetic support and at least two layers, the at least two layers comprising at least one lower non-magnetic layer comprising non-magnetic particles and a binder, one of the at least one non-magnetic layers being located on the non-magnetic support, and at least one upper magnetic layer comprising ferromagnetic particles and a binder, one of the at least one upper magnetic layers being located on the lower non-magnetic layer located on the non-magnetic support, wherein the upper magnetic layer located on the lower non-magnetic layer located on the non-magnetic support has a mean total thickness d more than 0.01 μ

  • m to less than 0.3 μ

    m, and a standard deviation σ

    of the total thickness of the upper magnetic layer located on the lower non-magnetic layer located on the non-magnetic support and the mean total thickness d satisfy the following relationship;

    
    
    space="preserve" listing-type="equation">0.05<

    σ

    /d<

    0.5.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×