Patent ID: 6498697
Filing Date: 2002-12-24
Classification: G06K,G11B

Abstract:
A pattern of magnetic marks recorded on and reproduced from a high density magnetic medium using a magnetic head, the magnetic medium having multiple data tracks, the pattern comprising:marks representing logical binary â€œonesâ€  of data recorded perpendicular to the plane of the data tracks such that any two neighboring marks representing logical binary â€œonesâ€  located on the same or neighboring tracks have their magnetic axis oriented in opposite directions from each other perpendicular to the tracks' plane and parallel to each other; and marks representing logical binary â€œzeroesâ€  of data through non-magnetization of a location on the magnetic medium or by demagnetization of a location on the magnetic medium through repeated recording; wherein any two neighboring marks on any one of the data tracks stand at a predetermined distance from one another; wherein the pattern of marks are placed in an order similar to a chess board order: wherein the pattern of marks results in the formation of zero potential lines between the magnetic marks representing logical binary â€œonesâ€ , thus providing magnetic separation of the magnetic marks and elimination of cross-talk between the marks, wherein the zero potential lines are representative of locations where magnetic induction is nearly zero; and wherein the pattern of marks allows for interaction between the magnetic head and the magnetic medium to be through non-contact discrete magnetic modulation.