Semiconductor Memory Device

• Main Authors: HALLER GORDON, TANG SANH DANG, CUMMINGS STEVE
• Format: Patent
• Language: English
• Published: 10.06.2010
• Subjects: ELECTRICITY

A memory device comprising a vertical transistor includes a digit line that is directly coupled to the source regions of each memory cell. Because an electrical plug is not used to form a contact between the digit line and the source regions, a number of fabrication steps may be reduced and the possibility for manufacturing defects may also be reduced. In some embodiments, a memory device may include a vertical transistor having gate regions that are recessed from an upper portion of a silicon substrate. With the gate regions recessed from the silicon substrate, the gate regions are spaced further from the source/drain regions and, accordingly, cross capacitance between the gate regions and the source/drain regions may be reduced.