Patent ID: 11877434
Assignee: MICRON TECHNOLOGY, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An electronic system, comprising:
an input device;
an output device;
a processor device operably coupled to the input device and to the output device; and
a memory device operably coupled to the processor device and comprising a memory cell array comprising microelectronic devices, at least one of the microelectronic devices comprising, in at least one word line trench of word line trenches:
vertical features comprising a silicon material, the vertical features arranged in a series along a first horizontal axis, each vertical feature of at least one pair of the vertical features comprising:
a lower portion with a tapering sidewall adjacent a lower trench at least partially filled with insulative material;
a fin portion above the lower portion, the fin portion comprising a sidewall defining a different slope above the insulative material than a slope of the tapering sidewall of the lower portion of the vertical feature; and
a corner where the sidewall of the fin portion meets the tapering sidewall of the lower portion, an elevation of the corner of the vertical feature being an elevation of an upper surface of the insulative material;

elongate conductive structures above the vertical features, the elongate conductive structures being arranged parallel to one another and parallel to the first horizontal axis;
doped features comprising the silicon and at least one dopant, the doped features spacing the elongate conductive structures from one another along a second horizontal axis perpendicular to the first horizontal axis; and
within the lower trench, at least one additional elongate conductive structure extending substantially perpendicular to the elongate conductive structures,
wherein:
the at least one additional elongate conductive structure comprises one or more of titanium (Ti), tungsten (W), ruthenium (Ru), cobalt (Co), an alloy of any of the foregoing, or one or more compounds or combinations of any of the foregoing,
the insulative material is interposed between the at least one additional elongate conductive structure and the lower portion of the vertical feature,
the doped features extend to a higher elevation than the fin portions of the vertical features, and
sidewalls of the silicon material adjacent the word line trenches define a slope, relative to the upper surface of the insulative material, of at least about eighty-nine degrees.