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Author Topic: Allegro: How to allow blind/burried vias on top of each other?  (Read 536 times)

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Offline TheUnnamedNewbieTopic starter

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Allegro: How to allow blind/burried vias on top of each other?
« on: April 25, 2023, 07:25:53 am »
I have a 6 layer HDI packaging stackup. I'm allowed to have a blind via from M1 to M3, skip the M3 to M4, and then a via from M4 to M6. I have no idea how to tell the DRC engine this. Any suggestions?
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Offline nctnico

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Re: Allegro: How to allow blind/burried vias on top of each other?
« Reply #1 on: April 25, 2023, 02:39:55 pm »
I haven't tested this but it is like having an overlapping pad on top & bottom layer. IOW: if the vias don't have shared layers, the DRC shouldn't complain.
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