Interconnection for memory electrodes
View Patent ↗Row and/or column electrode lines for a memory device are staggered such that gaps are formed between terminated lines. Vertical interconnection to central points along adjacent lines that are not terminated are made in the gap, and vertical interconnection through can additionally be made through the gap without contacting the lines of that level.
1. An integrated circuit comprising a vertical interconnection region for connecting multiple levels of conductive lines, the integrated circuit comprising:
a first bundle of terminating adjacent conductive lines extending in a first direction and a second bundle of terminating adjacent conductive lines extending in the first direction, the first bundle and the second bundle being separated by a gap in the first direction, wherein the first bundle includes inner conductive lines that co-terminate in the first direction and a pair of outer conductive lines that extend farther than the inner conductive lines in the first direction;
a plurality of conductive lines adjacent the first bundle that pass through the gap in the first direction; and
a plurality of vertical connectors formed in the gap.
2. The integrated circuit of claim 1 , wherein some of the conductive lines passing through the gap include a jog segment within the gap which extends in a second direction crossing the first direction.
3. The integrated circuit of claim 2 , wherein the vertical connectors are connected to the jog segments of the conductive lines passing through the gap.
4. The integrated circuit of claim 2 , wherein the conductive lines passing through the gap are formed at a same vertical level as the first and second bundles, and wherein the vertical connectors are pass-through vertical connectors that electrically connect structures at vertical levels above and below the same vertical level.
5. An integrated circuit comprising a vertical interconnection region for connecting multiple levels of conductive lines, the integrated circuit comprising:
a first bundle of terminating adjacent conductive lines extending in a first direction and a second bundle of terminating adjacent conductive lines extending in the first direction, the first bundle and the second bundle being separated by a gap in the first direction, wherein the first bundle includes inner conductive lines that co-terminate in the first direction and a pair of outer conductive lines that extend farther than the inner conductive lines in the first direction;
a plurality of conductive lines adjacent the first bundle that pass through the gap in the first direction; and
a plurality of vertical connectors formed in the gap,
wherein the conductive lines of one of the first and second bundles and the conductive lines passing through the gap have a periodic line-to-line distance of 2F in the second direction, wherein F is a narrowest line width in the integrated circuit.
6. The integrated circuit of claim 5 , wherein a distance in the first direction between adjacent jog segments is greater than the line-to-line distance.
7. An integrated circuit comprising a socket region for connecting multiple levels of conductive lines, the integrated circuit comprising:
a first plurality of terminating adjacent conductive lines extending in a first direction, wherein the terminating adjacent conductive lines include co-terminating inner conductive lines and an outer conductive line that extends beyond termination ends of the inner conductive lines;
a plurality of conductive lines adjacent the terminating adjacent conductive lines which extend farther in the first direction beyond a termination end of the outer conductive line, wherein each of the conductive lines extending farther in the first direction includes a jog segment which extends in a second direction crossing the first direction; and
a plurality of vertical connectors, wherein at least one of the vertical connectors is connected to one of the jog segments of the conductive lines extending farther in the first direction.
8. The integrated circuit of claim 7 , wherein the terminating adjacent conductive lines and the conductive lines extending farther in the first direction have a periodic line-to-line distance of 2F in the second direction, wherein F is a narrowest line width in the integrated circuit.
9. The integrated circuit of claim 8 , wherein a distance in the first direction between adjacent jog segments is greater than the periodic line-to-line distance.
10. The integrated circuit of claim 7 , further comprising a second plurality of adjacent conductive lines extending in the first direction, wherein the first adjacent conductive lines and the second adjacent conductive lines are separated by a gap in the first direction, and wherein the vertical connectors are formed in the gap.
11. The integrated circuit of claim 9 , wherein the first adjacent conductive lines and the second adjacent conductive lines are parallel and aligned in the first direction.
12. The integrated circuit of claim 10 , wherein the first adjacent conductive lines and the second adjacent conductive lines are parallel and not aligned in the first direction.
13. The integrated circuit of claim 7 , wherein the conductive lines extending farther in the first direction are formed at a same vertical level as the first terminating adjacent conductive lines, and wherein at least another of the vertical connectors is a pass-through vertical connector that electrically connects structures at vertical levels above and below the same vertical level.
14. The integrated circuit of claim 13 , wherein the at least one of the vertical connectors contacts a contacted conductive line extending farther in the first direction at a substantially central location that is no more than about 40% of the length of the contacted conductive line extending farther in the first direction from either end of the contacted conductive line extending farther in the first direction.
15. A method of forming a socket region for making vertical connections to a metal level in an integrated circuit, the method comprising:
using a pitch multiplication method, forming a first bundle of terminating conductive lines extending in a first direction and a second bundle of terminating conductive lines extending in the first direction, the first bundle and the second bundle being separated by a gap in the first direction, wherein the first bundle includes inner conductive lines that co-terminate in the first direction and a pair of outer conductive lines, at least one of the outer conductive lines extending beyond co-termination ends of the inner conductive lines in the first direction;
forming, using the pitch multiplication method, a plurality of conductive lines passing through the gap in the first direction; and
forming a plurality of vertical connectors in the gap.
16. The method of claim 15 , wherein forming at least some of the conductive line passing through the gap includes forming jog segments within the gap which extend in a second direction crossing the first direction.
17. The method of claim 16 , wherein forming the first bundle of terminating adjacent conductive lines comprises forming spacers surrounding sacrificial patterns extending in the first direction and removing end portions of the spacers formed in the gap from the inner ones of the conductive lines using a rectangular chop mask to co-terminate the inner conductive lines while not co-terminating the at least one of the outer conductive lines.