remon7
Active Member
What is the variation btw
padstack and via ? It seems same from the below image!!
https://imgur.com/cMC8FiV
padstack and via ? It seems same from the below image!!
https://imgur.com/cMC8FiV
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VIA's don't have to have holes. There are blind and burried VIA's. On a two sided board, they connect the top and bottom layers.
I think he was saying that a via may not have a hole that goes all the way through the board. The holes in blind and buried vias don't go all of the way through. Also, a via hole can be filled with copper plate by the PCB fabricator such that there is no longer a hole.
As for pad stacks. I frequently change a pad to have different pad sizes on different layers. For instance, a through hole connector will have a larger pad on the 'solder' side to facilitate hand soldering, but have a small pad on the component side allowing for more top side traces to go between the pads.