Patent ID: 7488188

Claim:
A differential transmission connector unit, comprising: a first differential transmission connector including a first signal contact pair and a first ground contact having a contact surface; and a second differential transmission connector including a second signal contact pair and a second ground contact having a contact surface, wherein: the first differential transmission connector is connected to the second differential transmission connector, with the first signal contact pair and the second signal contact pair being in contact with each other, and the first ground contact and the second ground contact being in contact with each other, the contact surface of the first ground contact contacting the contact surface of the second ground contact, with the contact surface of at least one of the first and second ground contacts being a rolled surface, the first ground contact includes first and second finger parts opposing each other, so that a surface of the first finger part facing away from the second finger part and a surface of the second finger part facing away from the first finger part, are rolled surfaces, the first ground contact further includes a plate-like main body part, a U-shaped base part having a principal part and first and second bent portions that are each bent with respect to the principal part, and a connection part between the main body part and the U-shaped base part, and the first and second finger parts extend from the first and second bent portions, respectively, in a direction in which the first differential transmission connector is connected to the second differential transmission connector such that a widthwise center line of the first finger part and a widthwise center line of the second finger part are each in a same plane as a center line of the thickness of the main body part.