Diamond medical devices
Masked and controlled ion implants, coupled with annealing or etching are used in CVD formed single crystal diamond to create structures for both optical applications, nanoelectromechanical device formation, and medical device formation. Ion implantation is employed to deliver one or more atomic species into and beneath the diamond growth surface in order to form an implanted layer with a peak concentration of atoms at a predetermined depth beneath the diamond growth surface. The composition is heated in a non-oxidizing environment under suitable conditions to cause separation of the diamond proximate the implanted layer. Further ion implants may be used in released structures to straighten or curve them as desired. Boron doping may also be utilized to create conductive diamond structures.
1. A method comprising:
forming a patterned mask on a single crystalline CVD diamond;
exposing the diamond to ion implantation through the mask at a selected energy level;
processing the diamond to form a void proximate the implanted ions corresponding to the pattern on the mask, and
exposing the diamond to ion implantation through the mask at multiple selected energy levels,
wherein the void has a depth that is dependent on the energy levels of the multiple exposures, and
wherein the void comprises a vertical via between channels at different levels of the diamond.
2. A method comprising:
forming a patterned mask on a single crystalline CVD diamond;
exposing the diamond to ion implantation through the mask at a selected energy level;
processing the diamond to form a void proximate the implanted ions corresponding to the pattern on the mask, and
exposing the diamond to ion implantation through the mask at multiple selected energy levels,
wherein the void has a depth that is dependent on the energy levels of the multiple exposures, and
wherein the void comprises a vertical via between a reservoir in the diamond and the surface of the diamond.
3. The method of claim 1 wherein the ion implantation comprises hydrogen ions.
4. The method of claim 1 wherein the ion implantation comprises carbon ions.
5. The method of claim 1 wherein processing the diamond comprises heating the diamond to a temperature sufficient to cause separation of the diamond about the implanted ions.
6. The method of claim 1 wherein processing the diamond comprises etching the diamond about the implanted ions.
7. The method of claim 1 wherein the voids comprises fluidic structures.
8. A method comprising:
forming multiple masks on a single crystalline chemical vapor deposition diamond;
selectively exposing the diamond to ion implantation through the masks at selected energy levels; and
processing the diamond to remove the diamond proximate the implanted ions corresponding to various patterns on the masks,
wherein the masks and implantation levels are selected to form three dimensional diamond structures,
wherein the three dimensional diamond structure comprises a released cantilever, and
wherein the three dimensional diamond structure comprises a multilevel pattern of capillaries with a void connecting at least two capillaries on different levels.
9. A method comprising:
forming multiple masks on a single crystalline chemical vapor deposition diamond;
selectively exposing the diamond to ion implantation through the masks at selected energy levels;
processing the diamond to remove the diamond proximate the implanted ions corresponding to various patterns on the masks; and
exposing the diamond to ion implantation through one mask at multiple selected energy levels to create a vertical void,
wherein the void has a depth that is dependent on the energy levels of the multiple exposures, and
wherein the void comprises a vertical via between channels at different levels of the diamond.
10. The method of claim 9 wherein the void comprises a vertical via between a reservoir in the diamond and the surface of the diamond.
11. The method of claim 9 wherein the diamond comprises a single crystalline CVD diamond.
12. The method of claim 9 wherein the ion implantation comprises hydrogen ions.
13. The method of claim 9 wherein the ion implantation comprises carbon ions.
14. The method of claim 9 wherein the ion implantations comprise both hydrogen ions and carbon ions during different exposures with different masks.
15. The method of claim 9 wherein processing the diamond comprises heating the diamond to a temperature sufficient to cause separation of the diamond about the implanted ions.
16. The method of claim 9 wherein processing the diamond comprises etching the diamond about the implanted ions.