DRAM transistor with a gate formed in a substrate trench

摘要

The invention includes a transistor device (69) having a semiconductor substrate (12) with an upper surface. A pair of source/drain regions (41,59) are formed within the semiconductor substrate and a channel region (46) is formed within the semiconductor substrate and extends generally perpendicularly relative to the upper surface of the semiconductor substrate. A gate (54) is formed within the semiconductor substrate between the pair of the source/drain regions (41,59) and can surround the channel region and/or one of the source/drain regions.