Patent ID: 11925011
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A memory structure comprising:
a first p-well, a second p-well, a third p-well, a first n-well, and a second n-well that extend along a first direction, wherein the first n-well is between the first p-well and the second p-well along a second direction, the second n-well is between the second p-well and the third p-well along the second direction, and the second direction is different than the first direction;
a p-type well strap area that includes the first p-well, the second p-well, the third p-well, the first n-well, and the second n-well, wherein the p-type well strap area includes:
a first p-type fin, a second p-type fin, a third p-type fin, and a fourth p-type fin arranged sequentially along the second direction, wherein the first p-type fin extends from the first p-well, the second p-type fin and the third p-type fin extend from the second p-well, and the fourth p-type fin extends from the third p-well,
a first gate structure on the second p-type fin having a first width along the second direction and a second gate structure on the third p-type fin having the first width along the second direction,
a first p-type epitaxial source/drain, a second p-type epitaxial source/drain, a third p-type epitaxial source/drain, and a fourth p-type epitaxial source/drain,
wherein the first p-type epitaxial source/drain and the second p-type epitaxial source/drain are on the second p-type fin and the first gate structure is between the first p-type epitaxial source/drain and the second p-type epitaxial source/drain along the first direction,
wherein the third p-type epitaxial source/drain and the fourth p-type epitaxial source/drain are on the third p-type fin and the second gate structure is between the third p-type epitaxial source/drain and the fourth p-type epitaxial source/drain along the first direction,
a source/drain contact on the first p-type epitaxial source/drain and the third p-type epitaxial source/drain, wherein the source/drain contact is connected to a voltage and the source/drain contact spans a spacing between the second p-type fin and the third p-type fin along the second direction; and

a memory area that includes the first p-well, the second p-well, the third p-well, the first n-well, and the second n-well, wherein the memory area includes:
a fifth p-type fin and a sixth p-type fin having the spacing therebetween along the second direction, wherein the fifth p-type fin and the sixth p-type fin extend from the second p-well,
a third gate structure on the fifth p-type fin and the sixth p-type fin having a second width along the second direction that is less than the first width, a fourth gate structure on the fifth p-type fin having the second width along the second direction, and a fifth gate structure on the sixth p-type fin having the second width along the second direction,
a first n-type epitaxial source/drain, a second n-type epitaxial source/drain, a third n-type epitaxial source/drain, a fourth n-type epitaxial source/drain, a fifth n-type epitaxial source/drain, and a sixth n-type epitaxial source/drain,
wherein the first n-type epitaxial source/drain, the second n-type epitaxial source/drain, and the third n-type epitaxial source/drain are on the fifth p-type fin, the third gate structure is between the first n-type epitaxial source/drain and the second n-type epitaxial source/drain along the first direction, and the fourth gate structure is between the first n-type epitaxial source/drain and the third n-type epitaxial source/drain along the first direction, and
wherein the fourth n-type epitaxial source/drain, the fifth n-type epitaxial source/drain, and the sixth n-type epitaxial source/drain are on the sixth p-type fin, the third gate structure is between the fourth n-type epitaxial source/drain and the fifth n-type epitaxial source/drain along the first direction, and the fifth gate structure is between the fourth n-type epitaxial source/drain and the sixth n-type epitaxial source/drain along the first direction.