July 31, 2020 at 6:16 pmCharlotte BlairAnsys EmployeeWhat size via should I use for my PCB design?
July 31, 2020 at 6:16 pmrtkAnsys EmployeeDepends on what the via is used for. If it’s a ground via then size doesn't really matter. If it is a signal via top level the via should be as wide as the trace it is attached to but more important is the board stack up the material used and the layer thicknesses as this will define the via impedance. The trace and via impedance should be the same so that the via does not add any reflections back onto the signal trace.
July 31, 2020 at 6:16 pmCharlotte BlairAnsys EmployeeHi - Does it matter if the via goes through all the layers of the board?
July 31, 2020 at 6:17 pmNavya CAnsys EmployeeThat depends on what the via is used for and at what the design frequency is. If the vias are signal vias used in a high speed design then the choice of via size, placement and routing are all important and should be carefully considered. Vias have impedance characteristics. For example if the vias are electrically long it can have some inductance. If the vias connect to internal metal planes they can have some capacitance. Using an electromagnetic simulation tool to route and analyse the vias is suggested in such cases.
- You must be logged in to reply to this topic.
Simulation World 2022
Check out more than 70 different sessions now available on demand. Get inspired as you hear from visionary companies, leading researchers and educators from around the globe on a variety of topics from life-saving improvements in healthcare, to bold new realities of space travel. Take a leap of certainty and check out a session today here.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- Signing up as ANSYS Support Coordinator
- Maxwell, HFSS or Q3D?
- How to export Ansys Maxwell simulation results for post-processing in matlab or in .csv file
- Illegal External Terminal – assigning current to a coil
- Number of parallel paths in Ansys Maxwell
- Failed to recover curve outlines
- Domain Decomposition in HFSS
- Feeding experimental data (temperature) in to Ansys to get conductivity
- meshing problem