Coarse grid design methods and structures
View Patent ↗A layer of a mask material is deposited on a substrate. A beam of energy is scanned across the mask material in a rasterized linear pattern and in accordance with a scan pitch that is based on a pitch of conductive structure segments to be formed on the substrate. The beam of energy is defined to transform the mask material upon which the beam of energy is incident into a removable state. During scanning the beam of energy across the mask material, the beam of energy is turned on at locations where a conductive structure is to be formed on the substrate, and the beam of energy is turned off at locations where a conductive structure is not to be formed on the substrate.
1. A method of fabricating an integrated circuit, comprising:
depositing a layer of a mask material on a substrate;
scanning a beam of energy across the mask material in a rasterized linear pattern and in accordance with a scan pitch that is based on a pitch of conductive structure segments to be formed on the substrate, wherein the beam of energy is defined to transform the mask material upon which the beam of energy is incident into a removable state; and
during scanning the beam of energy across the mask material, turning the beam of energy on at locations where a conductive structure is to be formed on the substrate, and turning the beam of energy off at locations where a conductive structure is not to be formed on the substrate.
2. The method of claim 1 , wherein the scan pitch is equal to and aligned with the pitch of conductive structure segments to be formed on the substrate.
3. The method of claim 2 , wherein the conductive structure segments to be formed on the substrate are gate level conductive structure segments.
4. The method of claim 3 , wherein some of the gate level conductive structure segments form one or more transistor gate electrodes.
5. The method of claim 1 , wherein the scan pitch is one-half of a gate electrode pitch, and wherein the scan pitch is aligned with the gate electrode pitch.
6. The method of claim 5 , wherein the conductive structure segments to be formed on the substrate are contact structures.
7. The method of claim 6 , wherein the contact structures include at least one gate contact and at least one diffusion contact.
8. The method of claim 1 , wherein the scan pitch is equal to and aligned with an interconnect level conductive structure pitch.
9. The method of claim 8 , wherein the conductive structure segments to be formed on the substrate are interconnect level conductive structures.
10. The method of claim 8 , wherein the conductive structure segments to be formed on the substrate are via structures.
11. The method of claim 1 , wherein the beam of energy is an electron beam.
12. The method of claim 1 , wherein the beam of energy is a laser beam.
13. The method of claim 1 , wherein the mask material is a photoresist material.
14. A method of fabricating an integrated circuit, comprising:
depositing a layer of a mask material on a substrate;
scanning a beam of energy across the mask material in a rasterized linear pattern and in accordance with a scan pitch that is equal to at least a width of the beam of energy as measured in a direction perpendicular to a scan direction of the beam of energy, wherein the beam of energy is defined to transform the mask material upon which the beam of energy is incident into a removable state; and
during scanning the beam of energy across the mask material, turning the beam of energy on at locations where a conductive structure is to be formed on the substrate, and turning the beam of energy off at locations where a conductive structure is not to be formed on the substrate.
15. The method of claim 14 , wherein the scan pitch is substantially equal to the width of the beam of energy.
16. The method of claim 14 , wherein the beam of energy is turned on as the beam of energy is scanned perpendicularly across locations corresponding to a pitch of conductive structure segments to be formed on the substrate.
17. The method of claim 16 , further comprising:
controlling a time period during which the beam of energy is turned on at each location corresponding to the pitch of conductive structure segments to be formed on the substrate so as to control a width of the conductive structure segments to be formed on the substrate.
18. The method of claim 17 , further comprising:
turning the beam of energy on between one or more locations corresponding to the pitch of conductive structure segments to be formed on the substrate so as to transform the mask material between the one or more locations to provide for formation of a conductive structure that extends between the one or more locations.
19. The method of claim 14 , wherein the beam of energy is either an electron beam or a laser beam.
20. The method of claim 14 , wherein the mask material is a photoresist material.