Patent ID: 11949144
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A structure of mounting a transmission line substrate to a different substrate by a conductive bonding material, wherein
the transmission line substrate includes:
a line portion;
a connecting portion;
a base material including a main surface and a plurality of base material layers that are stacked on each other;
a first ground conductor on at least one of the plurality of base material layers;
a second ground conductor on at least one of the plurality of base material layers;
a signal line on at least one of the plurality of base material layers;
a first ground electrode of the connecting portion, the first ground electrode being on the main surface of the base material and being electrically connected to the first ground conductor and the second ground conductor; and
a plurality of interlayer connection conductors in the base material;

in the line portion, a transmission line having a strip line structure including the signal line, the first ground conductor, and the second ground conductor is provided;
the different substrate includes a substrate signal line and a substrate ground electrode provided on a surface;
the first ground electrode is bonded to the substrate ground electrode through the conductive bonding material;
while the transmission line substrate is mounted on the different substrate, a facing portion is provided in which the signal line of the connecting portion and the substrate signal line face each other in a stacking direction in which the plurality of base material layers are stacked on each other, without an interlayer connection conductor and a conductive bonding material;
the plurality of interlayer connection conductors include a plurality of first interlayer connection conductors and a plurality of second interlayer connection conductors that electrically connect the first ground conductor and the second ground conductor;
the plurality of first interlayer connection conductors are provided at the line portion, and, when viewed in the stacking direction, are provided along the signal line;
while the transmission line substrate is mounted on the different substrate, the plurality of second interlayer connection conductors are provided at the connecting portion, and, when viewed in the stacking direction, surround the facing portion;
a portion of the plurality of second interlayer connection conductors is provided in at least one of the plurality of base material layers provided between a portion of the signal line and the main surface of the base material, the portion of the signal line facing the substrate signal line; and
an interval of the plurality of second interlayer connection conductors is smaller than an interval of the plurality of first interlayer connection conductors.