G PHYSICS
G11 INFORMATION STORAGE
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B5/00 Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
G11B5/62 Record carriers characterised by the selection of the material
G11B5/73 Base layers; , i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
G11B5/739 Magnetic recording media substrates
G11B5/73923 Organic polymer substrates