关键词: 差分过孔, 残桩, 端接阻抗, 传输参数

Abstract:

To solve the signal reflection problem which is brought by the impedance discontinuity of differential vias, a new structure of differential vias is proposed. This new structure reduces the signal reflection by compensating the anti-pad of differential vias and terminating the stubs. In this way, the quality of received signal is improved. The effectiveness and the practicability of this method are validated by the comparisons of the transmission parameters in frequency domain and the eye diagram in time domain between initial via structure and the optimized via structure.

Key words: differential vias；stub；terminal impedance；transmission parameters