Patent ID: 11942276
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A manufacturing method for a second-stage ceramic collective board, comprising:
a step of making a first-stage ceramic collective board; and
a step of making a second-stage ceramic collective board, wherein
based on an X direction, a Y direction perpendicular to the X direction, and a Z direction perpendicular to the X direction and the Y direction, each of the X direction, the Y direction, and the Z direction having a positive side and a negative side,
the first-stage ceramic collective board includes a first-stage ceramic multilayer body,
the first-stage ceramic multilayer body includes
a plurality of first-stage ceramic layers that extend in the X direction and the Y direction and that are arranged side by side in the Z direction,
a plurality of first-stage first inner electrodes that are disposed between a pair of first-stage ceramic layers adjacent to each other in the Z direction among the plurality of first-stage ceramic layers and that extend in the X direction and the Y direction and are arranged side by side in the X direction with a first gap interposed therebetween, the first gap having a width A, and
a plurality of first-stage second inner electrodes that are disposed between a pair of first-stage ceramic layers adjacent to each other in the Z direction among the plurality of first-stage ceramic layers and that extend in the X direction and the Y direction and are arranged side by side in the X direction with a second gap interposed therebetween, the second gap having a width B, the pair of first-stage ceramic layers sandwiching the plurality of first-stage second inner electrodes being different from the pair of first-stage ceramic layers sandwiching the plurality of first-stage first inner electrodes,

the first-stage first inner electrodes each include a first cutout on at least one of end portions in the Y direction, the first cutout extending in the X direction and the Y direction and having the width B in the X direction,
the first-stage second inner electrodes each include a second cutout on at least one of end portions in the Y direction, the second cutout extending in the X direction and the Y direction and having the width A in the X direction,
when the first-stage ceramic multilayer body is seen through in the Z direction, there are provided
a first region where the first gap and the second cutout overlap each other, and
a second region where the second gap and the first cutout overlap each other,

the second-stage ceramic collective board is obtained by dividing the first-stage ceramic collective board into a plurality of portions in the Y direction,
the second-stage ceramic collective board includes a second-stage ceramic multilayer body constituted by a plurality of second-stage ceramic layers stacked on each other,
in the second-stage ceramic collective board, a second-stage first inner electrode is formed between at least one pair of second-stage ceramic layers of the second-stage ceramic multilayer body, and a second-stage second inner electrode is formed between at least one pair of second-stage ceramic layers of the second-stage ceramic multilayer body, the at least one pair of second-stage ceramic layers sandwiching the second-stage first inner electrode being different from the at least one pair of second-stage ceramic layers sandwiching the second-stage second inner electrode,
when the first-stage ceramic collective board is seen through in the Z direction,
the first region includes a first-region positive side and a first-region negative side, the first-region positive side extending in the Y direction and being positioned on the positive side in the X direction, the first-region negative side extending in the Y direction and being positioned on the negative side in the X direction,
the second region includes a second-region positive side and a second-region negative side, the second-region positive side extending in the Y direction and being positioned on the positive side in the X direction, the second-region negative side extending in the Y direction and being positioned on the negative side in the X direction,
an imaginary line positioned at an equal distance from the first-region positive side and from the first-region negative side and extending in the Y direction is set to be a first cutting line, and
an imaginary line positioned at an equal distance from the second-region positive side and from the second-region negative side and extending in the Y direction is set to be a second cutting line, and

the second-stage ceramic collective board is obtained by dividing the first-stage ceramic collective board into a plurality of portions in the Y direction along the first cutting line and the second cutting line.