US 12,482,913 B2
Printed wiring board, multilayer resonator, and multilayer filter
Atsuo Kawagoe, Kyoto (JP); Takashi Ishioka, Kyoto (JP); Masanori Naito, Kyoto (JP); and Nobuyuki Ueda, Kyoto (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 18/269,137
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Dec. 10, 2021, PCT No. PCT/JP2021/045579
§ 371(c)(1), (2) Date Jun. 22, 2023,
PCT Pub. No. WO2022/138242, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2020-217149 (JP), filed on Dec. 25, 2020.
Prior Publication US 2024/0040693 A1, Feb. 1, 2024
Int. Cl. H01P 1/203 (2006.01); H03H 1/00 (2006.01); H05K 1/02 (2006.01); H05K 1/11 (2006.01)
CPC H01P 1/20345 (2013.01) [H03H 1/00 (2013.01); H05K 1/0298 (2013.01); H05K 1/115 (2013.01); H03H 2001/0085 (2013.01); H05K 2201/09609 (2013.01); H05K 2201/09836 (2013.01)] 7 Claims
OG exemplary drawing
 
6. A multilayer resonator comprising:
a dielectric layer;
a first conductor layer;
a second conductor layer;
a plurality of via conductors,
wherein
the dielectric layer has a first surface and a second surface opposite to the first surface,
the first conductor layer lies in the first surface of the dielectric layer,
the second conductor layer lies in the second surface of the dielectric layer,
the plurality of via conductors each extend through the dielectric layer from the first surface to the second surface and connect the first conductor layer and the second conductor layer to each other,
part that is surrounded with the plurality of via conductors and that is an overlap between the first conductor layer and the second conductor layer in a transparent plan view is provided,
when viewed in plan, the plurality of via conductors each have an aspect ratio greater than 1 and each have a major axis extending in a first direction and a minor axis extending in a second direction, and
the plurality of via conductors comprise a via conductor whose major axis extends along a periphery connecting the plurality of via conductors arranged in a line,
the multilayer resonator further comprising a third conductor layer located between the first conductor layer and the second conductor layer and extending in parallel to the first surface, wherein
two or more of the plurality of via conductors are arranged side by side in the second direction, and
in each of the plurality of via conductors, an end portion in the first direction is at least partially in contact with the third conductor layer, and a middle portion which is a part of each of the plurality of via conductors from which the end portion is excluded is at least partially separate from the third conductor layer.