Patent ID: 8535766

Claim:
A method, comprising: disposing a pattern on a magnetic thin film on both sides of a substrate, with selective regions of the pattern permitting energized ions of one or more elements to penetrate through the selective regions of the pattern and impinge upon portions of the magnetic thin film; positioning the substrate having the pattern thereon within a chamber; sequentially injecting helium and a boron-containing gas into the chamber, wherein the helium and the boron-containing gas are sequentially ionized into plasma to implant energized helium and boron ions into the portions of the magnetic thin film adjacent the selective regions of the pattern disposed on the substrate, and wherein the energized helium ions and the energized boron ions are implanted at the same bias voltage and the helium ions are implanted within the magnetic thin film to a greater depth than the boron ions; and rendering the portions of the magnetic thin film adjacent the selective regions on both sides of the substrate to exhibit a magnetic property different than selective other portions of the magnetic thin film.