Process solutions containing surfactants
Process solutions comprising one or more surfactants are used to reduce the number of defects in the manufacture of semiconductor devices. In certain preferred embodiments, the process solution of the present invention may reduce post-development defects such as pattern collapse when employed as a rinse solution either during or after the development of the patterned photoresist layer. Also disclosed is a method for reducing the number of pattern collapse defects on a plurality of photoresist coated substrates employing the process solution of the present invention.
1. A process rinse solution to reduce pattern collapse defects on the surface of a substrate having a photoresist that has been patterned and developed, the solution consisting of at least one carrier medium selected from the group consisting of an aqueous solvent or a non-aqueous solvent and 10 ppm to about 10,000 ppm of at least one surfactant selected from the group of surfactants having the formula, (IVa), or (VIII):
wherein R 1 and R 4 are each independently a straight or a branched alkyl group having from 3 to 10 carbon atoms; R 2 and R 3 are each independently a hydrogen atom or an alkyl group having from 1 to 5 carbon atoms; R 5 is a straight or a branched alkyl group having from 1 to 10 carbon atoms; R 6 is a straight or a branched alkyl group having from 4 to 16 carbon atoms; R 7 , R 8 , and R 9 are each independently a straight or a branched alkyl group having from 1 to 6 carbon atoms; R 10 is a hydrogen atom or a group represented by the formula
R 11 is a straight, a branched, or a cyclic alkyl group having from 4 to 22 carbon atoms; W is a hydrogen atom or an alkynyl group; X and Y are each independently a hydrogen atom or a hydroxyl group; Z is a halide atom, a hydroxyl group, an acetate group, or a carboxylate group; m and n are each independently a number that ranges from 0 to 20; r and s are each independently 2 or 3; t is a number that ranges from 0 to 2; j is a number that ranges from 1 to 5; and x is a number that ranges from 1 to 6.
2. The process solution of claim 1 wherein the at least one carrier medium comprises an aqueous solvent.
3. The process solution of claim 2 wherein the at least one carrier medium comprises a non-aqueous solvent wherein the non-aqueous solvent is miscible in the aqueous solvent.
4. The process solution of claim 1 wherein the at least one carrier medium is an aqueous solvent and the at least one surfactant is a surfactant having the following formula (IVa):
wherein R 1 and R 4 are each independently a straight or a branched alkyl group having from 3 to 10 carbon atoms and r and s are each independently 2 or 3.
5. The process solution of claim 1 wherein the at least one carrier medium is an aqueous solvent and the at least one surfactant is a surfactant having the following formula (VIII):
wherein R 10 is a hydrogen atom or a group represented by the formula
R 11 is independently a straight, branched, or cyclic alkyl group having from 4 to 22 carbon atoms; r and s are each independently 2 or 3; and x is a number that ranges from 1 to 6.