[PCB_FORUM] Re: micro vias and blind vias
- From: SjChar3@xxxxxxxxxxxx
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Wed, 15 Feb 2006 09:53:56 -0500
Thanks Richard, we are planning on doing a board with a .5mm bga. Since i have
never dealt with blind or micro vias i thought i could read a little before I
start asking questions to our board house. I read a little last night and the
definition I get for a micro via is a via less than 5 mils drill. True?
Blind via i know is a via that can go into a internal layer and make a
connection. My question is "Do I create via as usual and make a pad on L02 and
top layer and call out that via where ever I may need that particular via? Do i
need to be consistent with layer names? I use L02, L02, L04... but the other
cad person uses Top, Ground, Power, Bottom. When he tries to use th vias i
created will it work on his board? These are beginner questions and i don't
know if a board house will answer these types of questions. They'll probably
point me to the cadence user group. I best check out the suggested website and
better i learn more. Anyone want to send me a pad stack?
Thanks Sam
"richard moffat" <richard.moffat@xxxxxxxxxxxxxxxxxxx> wrote:
>Sam
>
>Different vendors will be able to cope with different materials. You really
>need to contact the vendor to see what prepregs their laser (or whatever) can
>punch through for blind vias, and what aspect ratios they can do with the
>technology they have on site.
>
>Richard
>
>
>
>>>> SjChar3@xxxxxxxxxxxx 15/02/2006 9:10 a.m. >>>
>
>Group: Looking for reading material for micro vias and using blind vias. Can
>anyone recommend good sites.
>Thanks
>Sam
>
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