Patent ID: 7638001
Filing Date: 2009-12-29
Classification: H01L

Abstract:
1. A film forming apparatus which forms a film on a substrate by utilizing a chemical solution, comprising: a pipeline which leads the chemical solution from an external solution container when the container is loaded on the film forming apparatus; a nozzle, coupled to the pipeline, which discharges the chemical solution through the pipeline to apply the chemical solution onto the substrate, the film being formed from the chemical solution; a correlation data creating unit, coupled to a first detector measuring an applied pressure of the chemical solution and providing data on a time period during which the pressure is applied and to receive the data on the time period from the first detector, which creates a correlation data that is related to quality of the chemical solution, from data that is related to the properties of the chemical solution including the data on the time period; a determining unit, responsive to the correlation data, which determines whether or not the chemical solution holds expected quality thereof on the bases of the correlation data; and a chemical-solution disposal commander that makes the chemical solution be disposed of, in response to the determination of the determining unit.