Zte Corporation

Changgang Yin

Bi Yi

Zhongmin Wei

Yonghui Ren

Yingxin Wang

Huazhang Cao

The present application relates to a circuit technology, and discloses a printed circuit board, including: a board body portion comprising a plurality of core boards and a plurality of dielectric layers, the plurality of core boards including a plurality of conductor layers, and the plurality of conductor layers including a differential signal transmission layer located on a surface layer of the board body portion and a differential signal line out layer located on an inner layer of the board body portion; two opposite differential signal holes located on the board body portion, the two differential signal holes being passed sequentially from the differential signal transmission layer to the differential signal line out layer through at least a portion of the core boards and connect the differential signal transmission layer to the differential signal line out layer; and two slotted conductive posts located between the two differential signal holes.

Printed circuit board

A circuit board is disclosed, including a circuit board body and at least one via apparatus provided on the circuit board body. The via apparatus includes a via () formed on the circuit board body, a via pad () surrounding the via and separately provided from the via, and an electrical conductor () electrically connecting the via pad () with the via ().

Circuit board

Provided are a circuit board, an apparatus and a method for forming a via hole structure. A via hole structure formed on a main body () of a circuit board includes a hole () enclosed by a conductive layer in the main body (), the conductive layer constitutes a wall () of the hole (), and a dielectric filling layer (), which has a dielectric constant smaller than that of the main body (), is disposed between at least a portion of the wall () of the hole () and the main body (), so that the parasitic capacitance of a via hole is decreased, and the impedance of the via hole is increased to become closer to the impedance of a transmission line, thereby effectively improving impedance continuity of a system link.

Growing community of inventors

Guangdong, China

Changgang Yin