Patent ID: 11935833
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 4:
5. A method of forming an integrated circuit (IC) structure, the method comprising:
forming a conductive line structure in the IC structure, the forming the conductive line structure including:
forming first and second sets of long pillars resulting in the following:
members of each of the first and second sets of long pillars having long axes that extend in a first direction;
for each of the first and second sets of long pillars, the members correspondingly thereof being non-overlapping of each other with respect to the first direction and being substantially coaxial; and
the second set of long pillars being offset in a second direction relative to the first set of long pillars, the second direction being orthogonal to the first direction;

forming a third set of short pillars resulting in the following:
members of the third set of short pillars being non-overlapping of each other;
the members of the third set of short pillars having long axes that extend in the second direction;
the members of the third set of short pillars being overlapping of corresponding long pillars in the first and second sets of long pillars;
the third set of short pillars being organized into groups, each of the groups having a first quantity of short pillars;
for each of the groups of the third set of short pillars, each member of the group correspondingly overlapping a pair, the pair including one member from each of the first and second sets of long pillars;
each long pillar in each of the first and second sets of long pillars being overlapped by a second quantity of corresponding short pillars in the third set; and
the first quantity of short pillars being less than the second quantity of corresponding short pillars; and

forming first vias which electrically connect the members of the third set of short pillars correspondingly with the members of the first and second sets of long pillars resulting in the following:
each short pillar overlaps and is electrically connected between a corresponding one of the pairs; and
each long pillar in each of the first and second sets of long pillars that is overlapped by the second quantity of corresponding short pillars in the third set being electrically connected to the second quantity of corresponding short pillars in the third set.