Method and apparatus for patterning micro and nano structures using a mask-less process
View Patent ↗According to a specific embodiment of the present invention, a mask-less lithography method and apparatus is provided. The apparatus includes an integrated write head on a slider with an air bearing that creates a lift force that allows that write head to fly over a spinning wafer substrate in nanometer distance without physical contact. The short distance between the write head and substrate prevents the light from diffracting. As a result, micro and nanometer structures can be patterned without being limited by light diffraction in conventional lithography methods.
1. A method for patterning one or more surface regions using a mask-less process, the method comprising:
providing a substrate including a surface region, the surface region having a thickness of particle sensitive material overlying the surface region, the thickness of particle sensitive material having a surface topography;
suspending a head member including a particle source and an air bearing region over a spatial portion of the surface topography of the thickness of particle sensitive material provided on the surface region of the substrate;
moving the surface region including the particle sensitive material relative to the head member including the particle source to cause an air flow between the air bearing region and a portion of the surface topography to create a lifting force using at least the air bearing region as the air bearing region moves relative to the surface topography of the particle sensitive material, while the head member being suspended by a suspension member coupled to the head member;
selectively exposing one or more portions of the particle sensitive material using the particle source provided on the head member while the particle sensitive material is being moved relative to the head member to form one or more exposed patterns on the particle sensitive material.
2. The method of claim 1 wherein the moving is provided by rotating the substrate about a center region.
3. The method of claim 1 wherein the moving is provided by rotating the substrate including the surface topography about a center region, while the air bearing region moves along the surface topography.
4. The method of claim 1 wherein the particle source is selected from a light source, a laser diode device, an optical waveguide, and a field emission source.
5. The method of claim 1 wherein the substrate is selected from a semiconductor wafer, a glass substrate, a quartz substrate, a multilayered substrate, or a silicon wafer.
6. The method of claim 1 wherein the particle source is coupled to an aperture region.
7. The method of claim 1 wherein the particle source is coupled to a lens region, the lens region being provided to focus a beam from the particle source.
8. The method of claim 1 wherein the head member is one of a plurality head members, each of the head members being suspended from a respective suspension member.
9. The method of claim 8 wherein the plurality of head members are spatially disposed along a portion of the surface topography.
10. The method of claim 9 wherein each of the plurality of head members is coupled to a stage member.
11. The method of claim 10 wherein the stage member is operable to provide movement from a first location to a second location of at least one of the head members.
12. The method of claim 1 wherein the particle sensitive material is a photoresist material, an electron sensitive material, or a chemical sensitive material.
13. A method for patterning one or more surface regions using a mask-less process, the method comprising:
providing a substrate including a surface region, the surface region having a thickness of particle sensitive material overlying the surface region, the thickness of particle sensitive material having a surface topography;
suspending a head member including a particle source region over a spatial portion of the surface topography of the thickness of particle sensitive material provided on the surface region of the substrate;
capturing an indication associated with a variable height of the spatial portion of the surface topography relative to a fixed height before the head member including the particle source moves within a vicinity of the spatial portion of the surface topography;
adjusting the head member to a desired distance between the particle source and the spatial portion of the surface topography, if the variable height is outside of a desired range;
selectively exposing one or more portions of the particle sensitive material at the spatial portion using the particle source provided on the head member to form one or more exposed patterns on the particle sensitive material.
14. The method of claim 13 wherein the indication is captured using a sensing device and wherein the one or more exposed patterns comprises at least one gray scale pattern or one binary pattern.
15. The method of claim 14 wherein the sensing device is selected from an optical element, an acoustic element, a capacitive element, an inductive element, and an electromagnetic element.
16. The method of claim 15 wherein the sensing device is coupled to the head member.
17. The method of claim 13 wherein the particle source is selected from an electromagnetic source, a field emission source, a chemical source, and an electron source.
18. The method of claim 13 wherein the adjusting is provided by an electrostatic force between the head member and an electrode member.
19. The method of claim 13 wherein the adjusting is provided by a feedback process from the indication being captured.
20. Apparatus for patterning one or more surface regions using a mask-less process, the apparatus comprising:
a substrate holder, the substrate holder being adapted to maintain a substrate including a surface region, the surface region having a thickness of particle sensitive material overlying the surface region, the thickness of particle sensitive material having a surface topography;
a suspension member operably coupled to the substrate holder;
a head member coupled to the suspension member, the head member including a particle source and an air bearing region, the air bearing region over a spatial portion of the surface topography of the thickness of particle sensitive material provided on the surface region of the substrate;
a spacing provided between the particle source and the spatial portion of the surface topography of the thickness of the particle sensitive material;
a drive device adapted to move the surface region including the particle sensitive material relative to the head member including the particle source to cause an air flow between the air bearing region and a portion of the surface topography to create a lifting force using at least the air bearing region as the air bearing region moves relative to the surface topography of the particle sensitive material, while the head member being suspended by the suspension member coupled to the head member; and
a controller device coupled to the particle source, the controller device being adapted to selectively expose one or more portions of the particle sensitive material using the particle source while the particle sensitive material is being moved relative to the head member to form one or more exposed patterns on the particle sensitive material.