[PCB_FORUM] Re: Vias too close to Gold plated edge connectors
- From: O Migs <o.miguelino@xxxxxxxxx>
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Mon, 28 Mar 2011 21:10:33 -0700
you can't mask a via on both sides assuming the gold fingers are on double
sides. via fill first, then mask.
if you want to save cost, encroach the via mask opening 6 mil larger than
the drill and shift via far enough from the gold.
br,
-oscar
On Mon, Mar 28, 2011 at 8:00 AM, Mark Salberg <msalberg@xxxxxxxxxxxx> wrote:
> Hi Mashak,
> Thanks for the reply.
> Does "close the mask" mean "tent the vias"?
> Why would it cost more to allow vias to plate?
>
> Thanks,
> Mark
>
>
>
> On 3/28/2011 9:41 AM, Maqbool, Mashak (GE Energy) wrote:
>
> Hi,
>
> Just close the mask for the Vias which are close to the Gold Fingers. This
> will save you additional cost.
>
> Regards,
> *Mashak Maqbool*
>
> ------------------------------
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx [
> mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx<icu-pcb-forum-bounce@xxxxxxxxxxxxx>]
> *On Behalf Of *Mark Salberg
> *Sent:* Monday, March 28, 2011 7:00 PM
> *To:* Cadence User Group
> *Subject:* [PCB_FORUM] Vias too close to Gold plated edge connectors
>
> Hi all,
> Can anyone tell me concerns about vias being "too close" (.8mm or .031") to
> gold plated edge connectors in PCB fabrication?
> I know that vias "too close" will be plated Nickel / gold. Does this create
> any concerns of integrity?
> I would like to minimize redundant replies from vendors which delay the
> delivery.
> Any feedback is appreciated.
>
> Thanks,
> Mark
>
> See image below.
> We have a via keep out in our lib parts set to 20 mil above plated pins.
> Our vendor response is as follows:
> *The via solder mask opening is too close to the gold fingers, so it will
> be plated Ni, Au.
> And also the via pad will have immersion gold when we are plating surface
> treatment.
> We suggest to cancel the via holes solder mask opening where the distance
> is less than 0.8mm to the gold fingers.*
>
> Their suggestion is:*
> A. Accept our suggestion.
> B. Follow Gerber, but accept the via pads will be plated Ni, Au.*
>
>
>
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