Differential transmission line formed on a wiring substrate and having a metal conductor ground layer, where a metal conductor removal block is formed in the ground layer at a location of curved sections of the differential transmission line

A wiring substrate, comprising:

• at least one differential transmission line structure, wherein the at least one differential transmission line structure includes:
• a ground layer, formed of a metal conductor;
• a dielectric layer, disposed on the ground layer;
• and
• a first transmission line for transmitting a first signal and a second transmission line for transmitting a second signal, disposed on the dielectric layer,
• wherein the first and second signals are phase inverted from each other,
• wherein a metal conductor removal block is distributed in at least one portion of at least one of a first projection area of the ground layer on which to project a curved section of the first transmission line and a second projection area of the ground layer on which to project a curved section of the second transmission line, and the metal conductor is provided in an entire region between the first projection area and the second projection area of the ground layer.

A differential transmission line, comprising:

• a ground layer, formed of a metal conductor;
• a dielectric layer, disposed on the ground layer;
• and
• a first transmission line and a second transmission line, disposed on the dielectric layer,
• wherein a metal conductor removal block is distributed in at least one portion of one of a first projection area of the ground layer on which to project a curved section of the first transmission line and a second projection area of the ground layer on which to project a curved section of the second transmission line, and the metal conductor is provided in an entire region of the other of the first projection area and the second projection area.

A wiring substrate, comprising:

• at least one differential transmission line structure, wherein the at least one differential transmission line structure includes:
• a ground layer, formed of a metal conductor;
• a dielectric layer, disposed on the ground layer;
• and
• a first transmission line and a second transmission line, disposed on the dielectric layer,
• wherein a metal conductor removal block is distributed in at least one portion of one of a first projection area of the ground layer on which to project a curved section of the first transmission line and a second projection area of the ground layer on which to project a curved section of the second transmission line, and the metal conductor is provided in an entire region of the other of the first projection area and the second projection area.