Method and apparatus for processing sapphire
View Patent ↗A method of producing a sapphire product from a suitable precursor material is disclosed. The method comprising the steps of placing a sapphire product precursor on a support apparatus of a crystalline material processing assembly further comprising at least one cutting tool and two or more x-ray module fixedly positioned around the product precursor. The support apparatus can be tilted and rotated in order to align the crystalline plane orientations to a fixed cutting direction, and the sapphire product can be produced by cutting in that direction.
1. A method of producing a sapphire product comprising the steps of:
i) providing a sapphire product precursor having a first crystalline plane orientation and a second crystalline plane orientation;
ii)providing a crystalline material processing assembly device comprising:
a) a first x-ray module attached to the device and fixedly positioned at a first angle relative to a fixed cutting direction and configured to determine alignment of the first crystalline plane of the sapphire product precursor relative to the fixed cutting direction;
b) a second x-ray module attached to the device and fixedly positioned at a second angle relative to the fixed cutting direction and configured to determine alignment of the second crystalline plane of the sapphire product precursor relative to the fixed cutting direction; and
c) a support apparatus for the sapphire product precursor attached to the device and tiltable and rotatable relative to the fixed cutting direction;
iii) placing the sapphire product precursor on the support apparatus;
iv) establishing alignment of the first crystalline plane via the first x-ray module and while the sapphire product precursor remains on the device, establishing alignment of the second crystalline plane of the sapphire product precursor via the second x-ray module to position the sapphire product precursor in the fixed cutting direction prior to any cutting steps following step i); and
v) cutting the sapphire product precursor along the fixed cutting direction to produce the sapphire product.
2. The method of claim 1 , wherein the first crystalline plane orientation is perpendicular to the second crystalline plane orientation.
3. The method of claim 1 , wherein the first crystalline plane orientation is a c-plane orientation and the second crystalline plane orientation is an a-plane orientation.
4. The method of claim 2 , wherein the fixed cutting direction is perpendicular to the first crystalline plane orientation and is parallel to the second crystalline plane orientation.
5. The method of claim 1 , wherein the sapphire product precursor has a cylindrical cross sectional shape.
6. The method of claim 1 , wherein the sapphire product precursor is a sapphire boule.
7. The method of claim 1 , wherein the sapphire product precursor comprises single crystal sapphire prepared in a crystal growth furnace.
8. The method of claim 7 , wherein the crystal growth furnace is a heat exchanger method furnace.
9. The method of claim 1 , wherein the sapphire product has a cylindrical shape.
10. The method of claim 9 , wherein the sapphire product has a substantially circular cross-sectional shape in a direction parallel to either the first crystalline plane orientation or the second crystalline plane orientation.
11. The method of claim 1 , wherein the sapphire product has a rectangular prism shape.
12. The method of claim 11 , wherein the sapphire product has a substantially rectangular cross-sectional shape in a direction parallel to either the first crystalline plane orientation or the second crystalline plane orientation.
13. The method of claim 1 , wherein the support apparatus comprises a flat platform upon which the sapphire product precursor is placed.
14. The method of claim 1 , wherein the sapphire product precursor is cut with a saw.
15. The method of claim 1 , wherein the step of cutting the sapphire product precursor comprises cutting a cylindrical core.
16. The method of claim 1 , wherein the step of cutting the sapphire product precursor comprises cutting a rectangular prismatic brick.
17. A crystalline material processing assembly device for aligning a sapphire product precursor having a first crystalline plane orientation and a second crystalline plane orientation in preparation for a cutting operation along a fixed cutting direction, the crystalline material processing assembly comprising:
a) a first x-ray module attached to the device and fixedly positioned at a first angle relative to the fixed cutting direction and configured to determine alignment of the first crystalline plane of the sapphire product precursor relative to the fixed cutting direction;
b) a second x-ray module attached to the device and fixedly positioned at a second angle relative to the fixed cutting direction and configured to determine alignment of the second crystalline plane of the sapphire product precursor relative to the fixed cutting direction while the sapphire product remains on the device, wherein aligning the first crystalline plane and the second crystalline plane establishes the fixed cutting direction; and
c) a support apparatus for the sapphire product precursor attached to the device and tiltable and rotatable relative to the fixed cutting direction, wherein the support apparatus tilts or rotates the sapphire product precursor to establish the fixed cutting direction based on the determined alignment of the first crystalline plane and the determined alignment of the second crystalline plane.