Patent ID: 7083892

Claim:
A positive resist composition comprising: (A) a compound generating an acid upon irradiation with actinic rays or radiation, the compound having: a partial structure represented by the following formula (1); and a counter ion; and (D) a resin capable of increasing in the solubility in an alkali developer under the action of an acid, wherein the composition comprises the compound (A) in an amount of from 3.6 to 15 wt % based on the solid content of the composition: wherein X represents a sulfur atom or an iodine atom and the plurality of Xs may be the same or different, R 1 and R 2 each independently represents an alkyl group which may have a substituent, or an aryl group which may have a substituent; when a plurality of R 1 s are present, the plurality of R 1 s may be the same or different; the plurality of R 2 s may be the same or different; and R 1 and R 2 may combine to form a ring, A and B each independently represents a hydrocarbon structure connecting between X + s, and at least two of X + s connected with B are in a conjugated system; and when a plurality of As are present, the plurality of As may be the same or different, l represents 0 or 1, and, when X is a sulfur atom, l parenthesizing R 1 connected to X + is l and when X is an iodine atom, l parenthesizing R 1 connected to X + is 0, m represents an integer of 0 to 10, and n represents an integer of 1 to 5.