Patent ID: 11912921
Assignee: FUJIFILM ELECTRONIC MATERIALS U.S.A., INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 6:
7. The composition of claim 1, wherein the composition comprises:
hydrofluoric acid in an amount of at most about 0.5 wt % of the composition;
hydrogen peroxide in an amount of from about 5 wt % to about 10 wt % of the composition;
acetic acid and acetic anhydride, the total amount of acid and acetic anhydride being from about 50 wt % to about 80 wt % of the composition;
a sulfonic acid having a structure of, , in which n is 3 to 6, the sulfonic acid is in an amount of from about 0.005 wt % to about 0.1 wt % of the composition;
N-(3-aminopropyl)-diethanolamine in an amount of from about 0.001 wt % to about 0.1 wt % of the composition;
an inorganic acid; and
water.