Particle irradiation method for modification of local strain in strain reactive structures
View Patent ↗Modified strain regions are created in correlation to strain reactive structures that are subjected to a predetermined dimensional precision adjustment. The modified strain regions are created by impacting incident particles into exposed regions of the strain reactive structures. The irradiation by the incident particles creates a predetermined material disruption and consequently a change in strain energy. The strain energy, and the associated dimensional adjustment is dependent on the irradiation process and the sum properties of the modified strain regions and the strain reactive structure.
1. A method for inducing a predetermined deformation on a structure, said method comprising the steps of:
A) defining exposure areas on a surface of said structure;
B) exposing said exposure areas to the impact of incident particles through particle irradiation to displace atoms through kinetic energy within said structure to create a modified strain region within said structure that expands due to the impact of the incident particles, said modified strain region is in static interaction with said structure to cause a compressive strain energy in said modified strain region and a tensile strain energy in said structure; and
C) creating said predetermined deformation as a balancing condition of said compressive strain energy in said modified strain region and said tensile strain energy in said structure, resulting in a convex curvature on said surface.
2. The method of claim 1 , wherein said structure is part of a disk drive slider.
3. The method of claim 2 , wherein said surface comprises an air bearing surface of said slider.
4. The method of claim 1 , wherein said modified strain region has a depth in the range between 0.1 and 2 μm.
5. The method of claim 1 , wherein defining said exposure areas comprises applying a mask on said surface of said structure.
6. A method for deforming a structure, the method comprising:
defining exposure areas on a surface of said structure; and
exposing said exposure areas to incident particles selected from the group consisting of ions, electrons, and neutral atoms to displace atoms through kinetic energy within said structure to create a modified strain region within said structure that expands due to impact of the incident particles, said modified strain region is in static interaction with said structure to cause a compressive strain energy in said modified strain region and a tensile strain energy in said structure which induces a convex curvature on said surface of said structure due to a balancing condition of said compressive strain energy in said modified strain region and said tensile strain energy in said structure.
7. The method of claim 6 , wherein said structure is part of a disk drive slider.
8. The method of claim 7 , wherein said surface comprises an air bearing surface of said slider.
9. The method of claim 6 , wherein said modified strain region has a damage depth in the range between 0.1 and 2 μm.
10. The method of claim 6 , wherein said particles are selected from the group consisting of ions of Helium, Argon, Hydrogen, Carbon, Nitrogen, Boron, Oxygen, and Neon.
11. The method of claim 6 , wherein defining said exposure areas comprises disposing a mask between said structure and a source of said particles.
12. The method of claim 6 , wherein defining said exposure areas comprises passing a beam of said particles through an aperture.