Hi Peter and Oscar, We design and fabricate HDI boards as well. Please contact me if you need to chat. deac007@xxxxxxxxx Deac On Thu, May 29, 2008 at 9:46 AM, Peter Pietrangelo < peter_pietrangelo@xxxxxxxxxxxxx> wrote: > Oscar, contact me at peter95123@xxxxxxxxxxxxx, I can give you contact > info for the shop we use to do HDI designs. > > > > Peter > > > ------------------------------ > > *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto: > icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *O Migs > *Sent:* Tuesday, May 27, 2008 6:24 PM > > *To:* icu-pcb-forum@xxxxxxxxxxxxx > *Subject:* [PCB_FORUM] Re: copper filling of micro vias. > > > > I have 2 shops telling me that they can't do it. They can fill the inner > blind via and the core, but not the L1-L2 via. > > I'm using a construction 2+8+2 construction w/ stack vias and a core from > L2-L7. > > Can anyone recommend a good fab for HDI designs? > > Thanks, > > -oscar > > On Mon, May 19, 2008 at 3:25 PM, Douglas Stanley <dstanley@xxxxxxxxxxxx> > wrote: > > We use a 5 mil drill and a 10 mil pad on both inner and outer layers. > > > > > ------------------------------ > > *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto: > icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *O Migs > > *Sent:* Monday, May 19, 2008 3:21 PM > > > *To:* icu-pcb-forum@xxxxxxxxxxxxx > > *Subject:* [PCB_FORUM] Re: copper filling of micro vias. > > What is your minimum drill size? We are using 12pad 5drill from L1-L2, > L2-L3. > > Regards, > > -oscar > > On 5/19/08, *Douglas Stanley* <dstanley@xxxxxxxxxxxx> wrote: > > We do boards every day that are 3 and 3 with microvias in pad. The board > shops completely fill the hole with copper and then plate over it. They then > planerize the copper so the pad is flat. I think it's pretty standard > nowadays. We simply add a note to the fab drawing to plate the microvia > closed and to "repad" so the surface is flat. > > > > > > Douglas G. Stanley > > PC Board Designer, Sr. Staff > > Broadcom Corporation- Irvine, CA > > dstanley@xxxxxxxxxxxx > > (949) 926-5889 > > > > > ------------------------------ > > *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto: > icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *O Migs > *Sent:* Monday, May 19, 2008 9:58 AM > *To:* icu-pcb-forum@xxxxxxxxxxxxx > *Subject:* [PCB_FORUM] copper filling of micro vias. > > Hi All, > > Does anyone know the requirements to copper fill or epoxy fill a microvia? > microvia is via in pad. Is there an alternative? > > I have a design that requires a fanout of 3.5 mil trace and 3mil airgap out > of a finepitch bga. > > -oscar > > ____________________________________________________ > > oscar miguelino | lead pcb engineer | *OQO*, inc. > > 583 shotwell street | san francisco, ca 94110 > > > > *(this message constitutes confidential information proprietary to OQO, > Inc.)* > > > > > > > -- Deac Descoteaux 8 Wayne Drive Nashua, NH 03062 Cell: (603) 557-7568