Abrasive composition for the integrated circuit electronics industry
View Patent ↗Abrasive composition for the integrated circuits electronics industry comprising an aqueous acid suspension of individualized colloidal silica particles not linked to each other by siloxane bonds and an abrasive surfactant, this abrasive being for mechanical chemical polishing in the integrated circuits industry, comprising a fabric impregnated by such a composition, and a process for mechanical chemical polishing.
1. An abrasive composition for the integrated circuit electronics industry, comprising an aqueous acid suspension of individualized colloidal silica particles not linked to each other by siloxane bonds, and a surfactant.
2. An abrasive composition according to claim 1 , characterized in that the pH of said composition is between 1 and 5.
3. An abrasive composition according to claim 1 , characterized in that the pH of said composition is between 2 and 3.
4. An abrasive composition according to claim 1 , characterized in that the average diameter of the abrasive particles of said composition is between 12 nm and 100 nm.
5. An abrasive composition according to claim 1 , characterized in that the average diameter of the abrasive particles of said composition is between 35 nm and 50 nm.
6. An abrasive composition according to claim 1 , characterized in that the concentration by weight in abrasive particles of said composition is between 5% and 50%.
7. An abrasive composition according to claim 1 , characterized in that the concentration by weight in abrasive particles of said composition is between 25% and 35%.
8. An abrasive composition according to claim 1 , characterized in that the volumic concentration of the surfactant of said composition is between 0.001% and 5%.
9. An abrasive composition according to claim 1 , characterized in that the volumic concentration of the surfactant of said composition is between 0.01% and 1%.
10. An abrasive composition according to claim 1 , characterized in that the surfactant of said composition is anionic or non-ionic.
11. An abrasive composition according to claim 1 , characterized in that the surfactant of said composition is anionic.
12. The abrasive composition of claim 1 substantially free of other components.
13. The abrasive composition of claim 1 which consists essentially of said aqueous acid suspension of said colloidal silica particles and said surfactant.
14. An abrasive for mechanical chemical polishing in the integrated circuits industry, comprising a fabric impregnated with an aqueous acid suspension of colloidal silica of pH between 1 and 5 containing individualized particles not linked to each other by siloxane bonds of diameter comprised between 12 and 100 nm and a surfactant.