Method and system for providing optical proximity correction for structures such as a PMR nose
View Patent ↗An optical mask for providing a pattern for portion of an electronic device, such as a magnetic recording transducer, is disclosed. The optical mask includes a device feature and at least one detached correction feature. The device feature includes a corner corresponding to a device corner of the pattern. The device corner has an angle of greater than zero degrees and less than one hundred eighty degrees. The at least one detached correction feature resides in proximity to but is physically separated from the corner. Each of the at least one detached correction feature is sub-resolution.
1. An optical mask for providing a pattern for a portion of an electronic device, the optical mask comprising:
a device feature including a corner corresponding to a device corner of the pattern, the device corner having an angle different from ninety degrees; and
at least one detached correction feature residing in proximity to and physically separated from the corner, each of the at least one detached correction feature being sub-resolution, the at least one detached correction feature corresponding to the corner and the device corner.
2. The optical mask of claim 1 wherein the at least one detached correction feature is symmetric.
3. The optical mask of claim 1 wherein the at least one detached correction feature is asymmetric.
4. The optical mask of claim 1 wherein the at least one detached correction feature includes at least one of a detached bar and a detached square.
5. The optical mask of claim 1 wherein the at least one detached correction feature includes at least one of a detached oval and a detached circle.
6. The optical mask of claim 1 further comprising:
an additional device feature separate from the device feature, the at least one detached correction feature being attached to the additional feature.
7. The optical mask of claim 1 wherein the at least one detached correction feature is optically opaque.
8. The optical mask of claim 1 wherein the optical mask includes an optically opaque portion having an aperture therein, the at least one detached correction feature corresponding to the aperture.
9. The optical mask of claim 1 wherein the electronic device is a magnetic recording transducer.
10. The optical mask of claim 9 wherein the magnetic recording transducer includes a perpendicular magnetic recording transducer.
11. An optical mask for providing a pattern for portion of a magnetic recording transducer, the optical mask comprising:
a pole nose portion including a corner corresponding to a pole nose corner of the pattern, the pole nose corner having an angle of more than ninety degrees and less than one hundred eighty degrees; and
at least one detached bar residing in proximity to and separate from the corner, each of the at least one detached bar being a sub-resolution feature, the at least one detached bar corresponding to the corner and the pole nose corner.
12. The optical mask of claim 11 further comprising:
an additional pole feature separate from the nose portion, the at least one detached bar feature being attached to the additional pole feature.
13. A method for providing a pattern for portion of an electronic device comprising:
providing an optical mask including a mask pattern having a device feature and at least one detached correction feature, the device corner having an angle different from ninety degrees, the at least one detached correction feature residing in proximity to and physically separated from the corner, each of the at least one detached correction feature being sub-resolution, the at least one detached correction feature corresponding to the corner and the device corner;
optically transferring the mask pattern to a resist layer to provide a resist mask having the pattern; and
forming the portion of the electronic device using the resist mask.
14. The method of claim 13 wherein the at least one detached correction feature is symmetric.
15. The method of claim 13 wherein the at least one detached correction feature is asymmetric.
16. The method of claim 13 wherein the at least one detached correction feature includes at least one of a detached bar and a detached square.
17. The method of claim 13 wherein the at least one detached correction feature includes at least one of a detached oval and a detached circle.
18. The method of claim 13 wherein the optical mask further includes an additional device feature separate from the device feature, the at least one detached correction feature being attached to the additional feature.
19. The method of claim 13 wherein the at least one detached correction feature is optically opaque.
20. The method of claim 13 wherein the optical mask includes an optically opaque portion having an aperture therein, the at least one detached correction feature corresponding to the aperture.
21. The method of claim 13 wherein the electronic device is a magnetic recording transducer.
22. The optical mask of claim 1 wherein the angle is greater than ninety degrees and less than one hundred and eighty degrees.
23. The optical mask of claim 1 wherein the at least one detached correction feature is configured to sharpen the device corner.
24. The optical mask of claim 11 wherein the at least one detached bar is configured to sharpen the pole nose corner.
25. The method of claim 13 wherein the angle is greater than ninety degrees and less than one hundred and eighty degrees.
26. The method of claim 13 wherein the at least one detached correction feature is configured to sharpen the device corner.