Wiring base and electronic device

A wiring base comprising:

• an insulation base having a first surface;
• a first differential-wiring channel positioned on the first surface;
• and
• a second differential-wiring channel positioned on the first surface, the first differential-wiring channel and the second differential-wiring channel being arranged side by side in a first direction,
• wherein the first differential-wiring channel comprises
• a pair of first signal conductors extending in a second direction intersecting the first direction, and
• a pair of first grounding conductors extending along the first signal conductors with the first signal conductors being interposed between the first grounding conductors, and
• wherein the second differential-wiring channel comprises
• a pair of second signal conductors extending in the second direction, and
• a pair of second grounding conductors extending along the second signal conductors with the second signal conductors being interposed between the second grounding conductors,
• the wiring base further comprising a first film extending in the second direction and positioned between a first grounding conductor and a second grounding conductor adjacent to each other when the first surface is viewed in plan.