公开(公告)号：US20030080835A1

公开(公告)日：2003-05-01

申请号：US10308612

申请日：2002-12-03

Applicant: FormFactor, Inc.

Inventor： Emad B. Hreish ,  Charles A. Miller

IPC: H01P005/02

CPC classification number: H03H7/38 ,  H03H7/0115 ,  H03H7/075 ,  H03H7/1758 ,  H03H2001/0085 ,  H05K1/0216 ,  H05K1/0231 ,  H05K1/0233 ,  H05K1/0251 ,  H05K1/113 ,  H05K1/116 ,  H05K1/162 ,  H05K3/3421 ,  H05K3/429 ,  H05K2201/09263 ,  H05K2201/09454 ,  H05K2201/09672 ,  H05K2201/09727 ,  H05K2201/10689

Abstract: A printed circuit board (PCB) via, providing a conductor extending vertically between microstrip or stripline conductors formed on separate layers of a PCB, includes a conductive pad surrounding the conductor and embedded within the PCB between those PCB layers. The pad's shunt capacitance and the magnitudes of capacitances of other portions of the via are sized relative to the conductor's inherent inductance to optimize frequency response characteristics of the via.