Composite devices of laminate type and processes

A process for fabricating a composite device of the laminate type having a laminate structure of a first ceramic layer and a second ceramic layer, each of the ceramic layers having one or a plurality of circuit element patterns formed on a surface thereof to provide an electronic circuit for performing a predetermined function, the process having the steps of;

• preparing first green sheets for making first ceramic layers and second green sheets for making second ceramic layers,
• forming one or a plurality of circuit element patterns on a surface of each of a required number of the first green sheets and a required number of the second green sheets,
• preparing a laminate comprising a plurality of layers by superposing the first green sheets and the second green sheets each having the circuit element pattern or patterns formed thereon, and
• firing the laminate,
• the first green sheet being prepared by using dielectric material in the sheet preparing steps, the second green sheet preparing steps having:
• preparing material sheets by using the dielectric material,
• forming a photoresist film on the surface of the material sheet prepared in the preparing step,
• providing on the photoresist film a plurality of through holes approximately uniformly distributed by the photolithography method,
• superposing magnetic material on the material sheet covering the photoresist film, and
• removing the photoresist film.

A process for fabricating a composite device of the laminate type having a laminate structure of a first ceramic layer and a second ceramic layer, each of the ceramic layers having one or a plurality of circuit element patterns formed on a surface thereof to provide an electronic circuit for performing a predetermined function, the process having the steps of;

• preparing first green sheets for making first ceramic layers and second green sheets for making second ceramic layers,
• forming one or a plurality of circuit element patterns on a surface of each of a required number of the first green sheets and a required number of the second green sheets,
• preparing a laminate comprising a plurality of layers by superposing the first green sheets and the second green sheets each having the circuit element pattern or patterns formed thereon, and
• firing the laminate,
• the first green sheet being prepared by using dielectric material in the sheet preparing steps, the second green sheet preparing steps having:
• preparing material sheets by using the dielectric material,
• providing on each of the material sheets a screen having a plurality of through holes approximately uniformly distributed, and printing magnetic material on a surface of each of material sheets through the screen, and
• removing the screen from the material sheet.

A process for fabricating a composite device of the laminate type having a laminate structure of a first ceramic layer and a second ceramic layer, each of the ceramic layers having one or a plurality of circuit element patterns formed on a surface thereof to provide an electronic circuit for performing a predetermined function, the process having the steps of;

• preparing first green sheets for making first ceramic layers and second green sheets for making second ceramic layers,
• forming one or a plurality of circuit element patterns on a surface of each of a required number of the first green sheets and a required number of the second green sheets,
• preparing a laminate comprising a plurality of layers by superposing the first green sheets and the second green sheets each having the circuit element pattern or patterns formed thereon, and
• firing the laminate,
• the first green sheet being prepared by using dielectric material in the sheet preparing steps, the second green sheet preparing steps having:
• preparing a slurry made from dielectric material,
• mixing the slurry with a plurality of strips made from the magnetic material to obtain a slurry mixture,
• forming the slurry mixture into a strip,
• drying the obtained slurry mixture of a strip.