TY - GEN
T1 - Optimum rotation angle for mitigating differential skew induced by glass cloth in PCBs
AU - Wang, C.
AU - Iokibe, K.
AU - Toyota, Y.
N1 - Publisher Copyright:
© 2018 Japan Institute of Electronics Packaging.
PY - 2018/6/6
Y1 - 2018/6/6
N2 - In high speed signal transmissions, glass cloth of the dielectric in printed circuit boards can cause a differential skew. It has been reported that the differential skew is mitigated when the angle between the differential transmission lines and the thread of the glass cloth is around 10°. However, the angle dependence between 10° and 45° and the optimum angle have not yet been investigated. This study focuses on the angle between the trace of the differential transmission lines and the thread of the glass cloth to investigate the angle dependence of the differential skew. We conducted a preliminary evaluation by analytical estimation of the phase delay difference in the differential transmission lines using our simple glass-cloth model. In a full-wave simulation, it was confirmed that the optimum angle between the threads of the glass cloth and the traces of the differential transmission lines is around 40°.
AB - In high speed signal transmissions, glass cloth of the dielectric in printed circuit boards can cause a differential skew. It has been reported that the differential skew is mitigated when the angle between the differential transmission lines and the thread of the glass cloth is around 10°. However, the angle dependence between 10° and 45° and the optimum angle have not yet been investigated. This study focuses on the angle between the trace of the differential transmission lines and the thread of the glass cloth to investigate the angle dependence of the differential skew. We conducted a preliminary evaluation by analytical estimation of the phase delay difference in the differential transmission lines using our simple glass-cloth model. In a full-wave simulation, it was confirmed that the optimum angle between the threads of the glass cloth and the traces of the differential transmission lines is around 40°.
KW - angle dependence
KW - differential skew
KW - differential transmission lines
KW - glass-cloth simple model
KW - phase delay
UR - http://www.scopus.com/inward/record.url?scp=85048762134&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85048762134&partnerID=8YFLogxK
U2 - 10.23919/ICEP.2018.8374316
DO - 10.23919/ICEP.2018.8374316
M3 - Conference contribution
AN - SCOPUS:85048762134
T3 - 2018 International Conference on Electronics Packaging and iMAPS All Asia Conference, ICEP-IAAC 2018
SP - 328
EP - 332
BT - 2018 International Conference on Electronics Packaging and iMAPS All Asia Conference, ICEP-IAAC 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 International Conference on Electronics Packaging and iMAPS All Asia Conference, ICEP-IAAC 2018
Y2 - 17 April 2018 through 21 April 2018
ER -