Patent ID: 8859059
Filing Date: 2014-10-14
Classification: B81C,C12M,H01F

Abstract:
1. A method for patterning a substrate, the method comprising: providing a magnetic field source outside said substrate configured to create a first constant magnetic field in a magnetic field region; providing a patterned mask placed at a predetermined distance and spaced from a surface of said substrate in said magnetic field region, said patterned mask being separate from the substrate and configured to create regions of different magnetic properties of the magnetic field on said surface according to a desired pattern, thereby forming a modulated magnetic field along said surface; operating the magnetic field source thereby applying said modulated magnetic field to said surface of the substrate thus creating a certain pattern of regions of interaction to be obtained on said surface of the substrate; said desired pattern corresponds to said certain pattern for a predetermined magnetic field profile and at said predetermined distance; interacting said substrate with magnetic particles, while under the application of said modulated magnetic field, the magnetic particles being attracted to selected regions of interaction defined by said certain pattern while being substantially not attracted to regions outside said regions of interaction, and creating on said surface of said substrate said certain pattern of regions interacted with the magnetic particles.