Process solutions containing surfactants
View Patent ↗Process solutions comprising one or more surfactants are used to reduce the number of pattern collapse defects on a plurality of photoresist coated substrates during the manufacture of semiconductor devices.
1. A method for reducing the number of pattern collapse defects during the manufacture of semiconductor devices, the method comprising:
providing a substrate comprising a photoresist coating;
exposing the substrate to a radiation source to form a pattern on the photoresist coating;
applying a developer solution to the substrate to form a patterned photoresist coating;
optionally rinsing the substrate with deionized water; and
contacting the substrate with a process solution consisting of at least one solvent and 10 ppm to about 10,000 ppm of at least one surfactant having the 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 each independently 2 or 3.
2. The method of claim 1 wherein the contacting step comprises a dynamic rinse.
3. The method of claim 1 wherein the contacting step comprises a static rinse.
4. The method of claim 1 wherein the surface of the substrate in the contacting step is wet with the developer solution.
5. The method of claim 1 wherein the surface of the substrate in the contacting step is wet with the deionized water rinse.
6. The method of claim 1 wherein the solvent comprises an aqueous solvent.
7. The method of claim 6 wherein the solvent comprises a non-aqueous solvent wherein the non-aqueous solvent is miscible in the aqueous solvent.
8. The method of claim 1 wherein the process stream is formed by injecting 10 to 10,000 ppm of the at least one surfactant into the solvent.
9. The method of claim 1 wherein the process stream is formed by applying 10 to 10,000 ppm of the at least one surfactant onto the surface of the substrate and applying the solvent to the substrate surface.
10. The method of claim 1 wherein the process stream is formed by passing the solvent through a cartridge comprising the at least one surfactant.
11. The method of claim 1 wherein a time of the contacting step ranges from 1 to 200 seconds.
12. The method of claim 11 wherein the time of the contacting step ranges from 1 to 150 seconds.
13. The method of claim 12 wherein the time of the contacting step ranges from 1 to 40 seconds.
14. The method of claim 1 wherein an at least one temperature of the contacting step ranges from 10 to 100° C.
15. The method of claim 1 wherein the solvent comprises a non-aqueous solvent.