Method and apparatus for producing a green sheet with an even thickness

An apparatus for producing a ceramic green sheet comprising:

• a slurry coater having a slurry room provided with an opening toward an outside of the slurry coater, the slurry coater receives a slurry supply, the slurry coater also includes a doctor edge formed along a fringe part of one side rim of the opening of the slurry coater;
• a carrier film holding member for holding a carrier film for forming a ceramic green sheet made from the ceramic slurry on the carrier film, the carrier film holding member is arranged such that the carrier film is pressed to the fringe part of the opening of the slurry room so as to close the opening, wherein the carrier film is moved along the opening such that the doctor edge exists at the downstream side;
• a flow rate measuring means for measuring the flow rate of the ceramic slurry actually supplied to the slurry room;
• a thickness measuring means for measuring the thickness of the ceramic green sheet actually formed on the carrier film;
• an appropriate flow rate data calculating means for collecting the measured data on the actual flow rate and the actual thickness of the ceramic sheet and determining the appropriate flow rate of the ceramic slurry to be supplied to the slurry room for obtaining a ceramic green sheet with a desired thickness based on the measured actual flow rate data and the actual thickness data;
• and
• a flow rate controlling means for controlling the flow rate of the ceramic slurry to be supplied to the slurry room based on the appropriate flow rate data.