Method of producing a ceramic laminate

A method of producing a ceramic laminate by laminating a plurality of pieces of ceramic layers, comprising:

• a first temporarily press-adhering step of laminating wide ceramic sheets including a plurality of ceramic layers in the direction of width in a number of pieces smaller than a final number of the laminated layers, followed by heating and pressing in the direction of lamination to form a pre-laminate;
• a second temporarily press-adhering step of cutting said pre-laminate into a plurality of pieces in the direction of width, laminating a plurality of the pre-laminates that have been cut, heating and pressing the pre-laminates in the direction of lamination to form a new pre-laminate;
• a unit-cutting step of forming a unit body having a width that includes a piece of ceramic layer in the direction of width and having a number of layers smaller than the final number of the laminated layers by cutting the pre-laminate obtained by conducting said second temporarily press-adhering step one time or a plurality of number of times into a plurality of pieces in the direction of width;
• a main press-adhering step of laminating a plurality of said unit bodies so that said ceramic layers are laminated in the final number of the laminated layers, and heating and pressing said unit bodies in the direction of lamination to obtain said ceramic laminate;
• a dewaxing step of heating and removing not less than 90% of a binder resin contained in said ceramic layers of said ceramic laminate after said main press-adhering step has been finished;
• and
• a sintering step of sintering said ceramic laminate.

A method of producing a ceramic laminate by laminating a plurality of pieces of ceramic layers, comprising:

• a first temporarily press-adhering step of laminating wide ceramic sheets including a plurality of ceramic layers in the direction of width in a number of pieces smaller than a final number of the laminated layers, followed by heating and pressing in the direction of lamination to form a pre-laminate;
• a unit-cutting step of forming a unit body having a width that includes a piece of ceramic layer in the direction of width and having a number of layers smaller than the final number of the laminated layers by cutting said pre-laminate into a plurality of pieces in the direction of width;
• a second temporarily press-adhering step of forming a unit body having a number of layers smaller than the final number of the laminated layers by repeating one or a plurality of number of times the procedure for forming a new unit body by laminating a plurality of said unit bodies, and heating and pressing said unit bodies in the direction of lamination;
• is a main press-adhering step of laminating a plurality of said unit bodies so that said ceramic layers are laminated in the final number of the laminated layers, and heating and pressing said unit bodies in the direction of lamination to obtain said ceramic laminate;
• a dewaxing step of heating and removing not less than 90% of a binder resin contained in said ceramic layers of said ceramic laminate after said main press-adhering step has been finished;
• and
• a sintering step of sintering said ceramic laminate.

A method of producing a ceramic laminate by alternately laminating ceramic layers and internal electrode layers, comprising:

• a press-adhering step of forming a pre-laminate by laminating wide ceramic sheets including a plurality of ceramic layers in the direction of width, and heating and pressing them in the direction of lamination;
• a unit-cutting step of forming a unit body having a width that include a piece of ceramic layer in the direction of width by so punching said pre-laminate as to assume a polygonal outer circumferential shape of which the inner angles are all not smaller than 90° or to assume a smoothly curved outer circumferential shape;
• a dewaxing step of heating and removing not less than 90% of a binder resin contained in said ceramic layers of said unit body;
• and
• a sintering step of sintering said unit body.

A method of producing a ceramic laminate by alternately laminating ceramic layers and internal electrode layers, comprising:

• primary press-adhering step of forming a pre-laminate by laminating wide ceramic sheets including a plurality of ceramic layers in the direction of width in a number of pieces smaller than a final number of the laminated layers, and heating and pressing them in the direction of lamination;
• a unit-cutting step of forming a unit body having a width that includes a piece of ceramic layer in the direction of width and having layers laminated in a number smaller than the final number of the laminated layers by so punching said pre-laminate as to substantially assume a circular shape, a barrel shape or an octagonal shape in the direction of width;
• a secondary press-adhering step of forming a ceramic laminate of the cylindrical shape, the barrel shape or the octagonal shape by laminating a plurality of said unit bodies, heating and pressing them in the direction of lamination;
• a dewaxing step of heating and removing not less than 90% of a binder resin contained in said ceramic layers of said ceramic laminate;
• a sintering step of sintering said ceramic laminate;
• and
• a grinding step of grinding or cutting two or more side portions of said cylindrical ceramic laminate to form two or more flat side portions.