Apparatuses and memory devices including air gaps between conductive lines

An apparatus, comprising:

• strings of memory cells extending vertically through an alternating sequence of conductive structures and insulative structures arranged in tiers, the strings of memory cells comprising oxide-nitride-oxide (ONO) structures substantially surrounding a channel;
• data lines overlying the strings of memory cells;
• and
• air gaps intervening between laterally neighboring data lines, the air gaps within horizontal boundaries of the ONO structures and the data lines external to the horizontal boundaries of the ONO structures, a portion of the air gaps extending beyond an upper surface of the data lines and another portion of the air gaps extending beyond a lower surface of the data lines, the air gaps exhibiting a width that is relatively greater than a width of the data lines in a horizontal direction that is substantially orthogonal to another horizontal direction in which the data lines extend.

A memory device, comprising:

• pillar structures extending vertically through one or more insulative materials;
• conductive lines overlying the pillar structures and extending in a first horizontal direction;
• insulative structures overlying the conductive lines;
• air gaps between laterally neighboring conductive lines, the conductive lines exhibiting a width that is substantially equal to a width of the insulative structures in a second horizontal direction orthogonal to the first horizontal direction, and the air gaps exhibiting a height in a vertical direction that is relatively greater than a combined height of the conductive lines and the insulative structures in the vertical direction;
• and
• a first dielectric material and a second dielectric material adjacent to the air gaps, the first dielectric material contacting vertical and horizontal surfaces of each insulative structure and defining upper boundaries of the air gaps, and the second dielectric material contacting the conductive lines and defining lower boundaries of the air gaps.