G11B2220/23 - CPC Classification Index

ClassID:

199284 ⎘

G11B2220/23 - CPC Classification

Classification description:

Record carriers by type; Disc-shaped record carriers characterised in that the disc has a specific layer structure

Sub-classes:

G11B2220/232 » Double-sided discs, i.e. two recording layers accessed from opposite sides 9
G11B2220/235 » Multilayer discs, i.e. multiple recording layers accessed from the same side 471

Recent Application in this class:

20250292796

FERROELECTRIC DATA STORAGE READER

20180082713

Composite HAMR media structure for high areal density

20150147592

Storage medium with layer(s) for enhanced heating

20110165439

Method of manufacturing a glass substrate for a magnetic disk, glass substrate for a magnetic disk, method of manufacturing a magnetic disk, and magnetic disk

20110104427

Glass substrates and methods of annealing the same

20090303860

Recording Process Status Deciding Apparatus and Recording Process Status Deciding Method

20060007798

Disk player

13531339

Glass substrates and methods of annealing the same