Wiring board and electronic device
A wiring board includes an insulating substrate including a first surface, a mount portion positioned on the first surface and equipped with an electronic element, a first signal line and a second signal line positioned parallel to each other on the first surface, and a recess positioned on the first surface. The recess is positioned around a first end as an end of the first signal line and a second end as an end of the second signal line. At least part of the recess, the first end, and the second end are overlapped with the mount portion in a planar view.
1 . A wiring board comprising: an insulating substrate including a first surface; a mount portion positioned on the first surface and equipped with an electronic element; a first signal line and a second signal line positioned parallel to each other on the first surface; and a recess positioned on the first surface; wherein the recess is positioned around a first end of the first signal line and a second end of the second signal line, and at least part of the recess, the first end, and the second end are overlapped with the mount portion in a planar view, wherein the insulating substrate includes a first conductor layer provided with a ground film conductor, the ground film conductor includes an ungrounded region, and the ungrounded region is overlapped with the first end and the second end in a plan perspective view.
2 . The wiring board according to claim 1 , wherein
at least part of the recess is positioned between the first end and the second end.
3 . The wiring board according to claim 1 , wherein
at least part of the recess is positioned on an extension of the first signal line and adjacent to the first end, or on an extension of the second signal line and adjacent to the second end.
4 . The wiring board according to any one of claim 1 , wherein the first signal line and the recess are not connected to each other, and the second signal line and the recess are not connected to each other.
5 . The wiring board according to claim 1 , wherein
the ungrounded region is overlapped with the recess positioned between the first end and the second end in a plan perspective view.
6 . The wiring board according to any one of claim 1 , the wiring board further comprising
a first ground line positioned between the first signal line and the second signal line, wherein
the recess includes a joint connected to the first ground line,
the recess includes an inner side surface provided with a side surface ground conductor extending from the joint in a thickness direction of the insulating substrate.
7 . The wiring board according to any one of claim 1 , the wiring board further comprising
a second ground line positioned opposite to the second signal line with respect to the first signal line and parallel to the second signal line, wherein
the second ground line includes a protrusion projecting beyond the first signal line in a longitudinal direction of the first signal line and bent toward the first signal line in a planar view.
8 . The wiring board according to claim 7 , wherein
the protrusion is connected to the recess.
9 . The wiring board according to claim 8 , the wiring board comprising
a side surface ground conductor extending in a thickness direction of the insulating substrate from a joint between the protrusion and the recess.
10 . The wiring board according to any one of claim 1 , wherein
the first signal line includes a width-reduced portion positioned near the first end.
11 . The wiring board according to any one of claim 1 , the wiring board comprising
a second ground line positioned opposite to the second signal line with respect to the first signal line and parallel to the second signal line, wherein
the first signal line and the recess have a minimum distance shorter than a minimum distance between the first signal line and the second ground line.
12 . The wiring board according to any one of claim 1 , the wiring board comprising
a first ground line positioned between the first signal line and the second signal line, wherein
the recess positioned between the first signal line and the second signal line has a width wider than a line width of the first ground line.
13 . An electronic device comprising:
the wiring board according to any one of claim 1 ; and
an electronic element mounted on the mount portion.