Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I've been here - just a bit busy so not as active.
The company I normally use doesn't do blind vias and I normally do mixed signal boards up to 6 layers so blind vias aren't a problem. Sometimes though I wish I could use them even on 4 layers because you run out of PCB surface to put the vias in without hitting something. I suspect that is what will force you to have to use them when you get to 8 layers or more.
I often reach a point where I am not sure which way to go with a layout so I save a copy and go down one route e.g. add another couple of layers and then can go back and try another solution and pick the one which seems to be going best.
PCB including the blind hole or buried hole drilling needs of many times, it demands a higher precision, manufacturing time-consuming, so it is more expensive than no including them.
Blind and buried vias are sometimes needed to get out of a large BGA or in a complex board, but our designers generally try to stay away from them. Both are going to add additional cost to manufacturing boards - blind more than buried. We have also found that yield can decrease when using blind and buried vias due to the increased overall difficulty in the manufacturing process.
We would only recommend using blind and/or buried vias when there are no other options or if you don't care about the cost of manufacturing.
Thanks Mr. Keith and PCBWING for the advice, till now I didn't use Buried/Blind vias and I'll try to avoid them as much as possible.
The problem is that the extra cost depends on whether they're used or not , and doesn't depend on their number, so If I used say 1 buried via, I'll have to pay the extra $400 which is the same price if I used tens of them !!
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.