Microelectronic devices with tiered blocks separated by progressively spaced slits, and related methods and systems

A method of forming a microelectronic device, comprising:

• forming a stack structure comprising a vertically alternating sequence of insulative structures and conductive structures arranged in tiers;
• forming a series of arrays of pillars extending through the stack structure, at least some of the pillars exhibiting bending;
• and
• forming a series of slit openings through the stack structure to divide the stack structure into a series of blocks, the blocks of a progressed portion of the series of blocks each comprising:
• an array of pillars of the series of arrays of pillars,
• a different block width than a block width of at least one neighboring block of the progressed portion of the series of blocks,
• wherein for each block of the progressed portion of the series of blocks neighboring two blocks in the progressed portion of the series of blocks the different block width is equally greater in block width from a first of the two neighboring blocks as it is lesser in block width from a second of the two neighboring blocks.

A microelectronic device, comprising:

• at least two decks each comprising a stack structure of vertically interleaved insulative structures and conductive structures, the stack structure comprising at least one portion comprising:
• arrays of pillars extending through the stack structure;
• and
• a series of slit structures vertically extending through the stack structure and dividing the arrays of pillars and the stack structure of the at least one portion into a series of blocks, each block of the series of blocks comprising one of the arrays of pillars,
• the series of blocks comprising at least one progressed portion adjacent an additional portion of the stack structure,
• within each of the at least one progressed portion of the series of blocks, the blocks having different widths than one another, and
• wherein, in the at least one progressed portion of the series of blocks, for each block neighboring two blocks in the at least one progressed portion, the different block width is equally greater in block width from a first of the two neighboring blocks as it is lesser in block width from a second of the two neighboring blocks.

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 at least one microelectronic device structure, the at least one microelectronic device structure comprising a series of progressively spaced slit structures extending through a stack structure, the series of progressively spaced slit structures defining a series of blocks of pillars comprising at least some pillars exhibiting bending,
• wherein, within an area of the series of progressively spaced slit structures, for each block neighboring two blocks of the series of blocks defined by the series of progressively spaced slit structures the each block is of equally greater width relative to a first of the two neighboring blocks as it is lesser in width relative to a second of the two neighboring blocks.