Patent ID: 11905499
Assignee: TOKUYAMA CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A cleaning liquid formed of a high-purity isopropyl alcohol and used in a semiconductor manufacturing process,
wherein a water content is 3 to 25 ppm by mass,
a concentration of an aldehyde compound having 1 to 6 carbon atoms is 10 to 500 ppb by mass,
a concentration of a ketone compound having 3 to 6 carbon atoms is 50 to 1000 ppb by mass,
a concentration of an acetal compound having 7 to 12 carbon atoms is equal to or less than 100 ppb by mass, and
when an acceleration test for performing heating at 120° C. for 4 hours is performed under a nitrogen atmosphere, an amount of increase in the concentration of the acetal compound is 30 or less times a value before the heating, and the concentration of the acetal compound is maintained to be a value equal to or less than 100 ppb by mass.