Pattern-forming method

A pattern-forming method comprising:

• selectively exposing a resist layer that is formed using a positive-tone radiation-sensitive resin composition comprising a resin component (B) and an acid generator;
• developing the resist layer to form a first pattern;
• forming an uncrosslinked embedded section between adjacent areas of the first pattern using a pattern-forming resin composition comprising a polymer (A) and a solvent, wherein the polymer (A) has a carbon content higher than a carbon content of the resin component (B), does not include silicon atom in a molecule, and is crosslinkable due to an acid generated from the acid generator;
• crosslinking the uncrosslinked embedded section in an area around an interface with the first pattern to form an array structure, wherein the first pattern, a first crosslinked section, the uncrosslinked embedded section, and a second crosslinked section are repeatedly arranged in the array structure in this order;
• and
• removing the first pattern and the uncrosslinked embedded section to form a second pattern.