Patent ID: 8496770

Claim:
A method of manufacturing a multilayer ceramic substrate having a cavity, the method comprising: forming first and second sheet stacks by pressurizing a plurality of unsintered ceramic sheets, respectively, through a first pressurization process; forming a hole penetrating through the second sheet stack; forming a third preliminary sheet stack by positioning the second sheet stack having the hole on the first sheet stack such that a cavity is provided in the third preliminary sheet stack; adhering first and second thin films at top and bottom of the third preliminary sheet stack, respectively, such that the cavity is covered with the first thin film and the cavity is sealed from surroundings by the first thin film; forming a third sheet stack by pressurizing the first and the second thin films and the third preliminary sheet stack through a second pressurization process on condition that the cavity is under an air pressure in the second pressurization process; and sintering the third sheet stack after removing the first and the second thin films.