Patent ID: 7989152

Claim:
A method for a magneto-optical photoresist, comprising: applying a magneto-optical photoresist to a surface; patterning the magneto-optical photoresist by using a magnetic alignment, wherein said magneto-optical photoresist comprises a photoresist with a colloidal suspension of magnetically sensitive particles that are each surfactant coated, and wherein said magnetically sensitive particles are magnetic particles or paramagnetic particles of a ferrofluid, said surfactant enabling even distribution of said magnetically sensitive particles in said ferrofluid; and patterning the magneto-optical photoresist by using a photo exposure, wherein the magnetic alignment provides a photo exposure alignment for the photo exposure, and wherein said magneto-optical photoresist has a sensitivity to light and a sensitivity to a magnetic field gradient, said magnetic field gradient being used to create said magnetic alignment that is accurate to 20 nanometers or less, thereby enabling a maintenance of a desired concentration of said magnetically sensitive particles within a given volume of said ferrofluid within said magneto-optical photoresist.