US 12,232,322 B2
3D RAM SL/BL contact modulation
Sheng-Chen Wang, Hsinchu (TW); Feng-Cheng Yang, Zhudong Township (TW); Meng-Han Lin, Hsinchu (TW); and Han-Jong Chia, Hsinchu (TW)
Assigned to Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Taiwan Semiconductor Manufacturing Company, Ltd., Hsin-Chu (TW)
Filed on Oct. 30, 2023, as Appl. No. 18/497,035.
Application 18/497,035 is a continuation of application No. 18/067,870, filed on Dec. 19, 2022, granted, now 11,805,652.
Application 18/067,870 is a continuation of application No. 17/122,228, filed on Dec. 15, 2020, granted, now 11,569,264, issued on Jan. 31, 2023.
Claims priority of provisional application 63/031,013, filed on May 28, 2020.
Prior Publication US 2024/0064984 A1, Feb. 22, 2024
Int. Cl. H10B 43/27 (2023.01); H01L 23/522 (2006.01); H10B 41/10 (2023.01); H10B 41/27 (2023.01); H10B 43/10 (2023.01)
CPC H10B 43/27 (2023.02) [H01L 23/5226 (2013.01); H10B 41/10 (2023.02); H10B 41/27 (2023.02); H10B 43/10 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An integrated circuit device, comprising:
a memory structure comprising memory cells in rows, wherein the rows extend laterally and are vertically stacked;
gate structures extending laterally along each row and providing control gates for the memory cells in the row;
a semiconductor channel for a one of the memory cells, wherein the semiconductor channel is lateral to the control gate corresponding to the one of the memory cells;
a data storage structure for the one of the memory cells, wherein the data storage structure is between the semiconductor channel and the corresponding control gate;
a source line, wherein the source line has a first lateral bulge, extends vertically, and contacts the semiconductor channel in a first contact area; and
a drain line, wherein the drain line has a second lateral bulge, extends vertically, and contacts the semiconductor channel in a second contact area;
wherein the first lateral bulge is closer to the second lateral bulge than is the first contact area to the second contact area.