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Electronics Forum / CAD / December 2007pcb pooling for BGAs
Guys In the uk we have easy access to PCB-pool and PCB train. These companies provide prototypes where the tooling is shared amongst multiple designs. However, neither service provides the design rules to fan out a 1mm pitch pcb. Does anyone know of a company providing this service for such pcb rules? The problem is that the anti-pad is too big and you can't route between them when they are 1mm apart. Any pointers appreciated. Regards Colin On 30 Nov, 08:49, "colin_toog...@yahoo.com" <colin_toog...@yahoo.com> wrote: > Guys > [quoted text clipped - 8 lines] > > Any pointers appreciated. How many layers are you using? You will need at least 6 layers for most BGAs to route them successfully. > On 30 Nov, 08:49, "colin_toog...@yahoo.com" <colin_toog...@yahoo.com> > wrote: [quoted text clipped - 14 lines] > How many layers are you using? You will need at least 6 layers for > most BGAs to route them successfully. Six it is. You can route out on top, bottom and two inner layers, leaving 2 for ground and a split power. So, to ask my question more accurately. What's the cheapest manufacturer in europe or the states to build a single 3 inch square pcb with design rules to allow a grid of vias on 1mm pitch with six layers? Colin > Guys > In the uk we have easy access to PCB-pool and PCB train. These > companies provide prototypes where the tooling is shared amongst > multiple designs. > However, neither service provides the design rules to fan out a 1mm > pitch pcb. Does anyone know of a company providing this service for > such pcb rules? The problem is that the anti-pad is too big and you > can't route between them when they are 1mm apart. Did you look at www.multipcb.com?  SignatureUwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt --------- Tel. 06151 162516 -------- Fax. 06151 164321 ---------- On 4 Dec, 23:28, Uwe Bonnes <b...@hertz.ikp.physik.tu-darmstadt.de> wrote: > colin_toog...@yahoo.com <colin_toog...@yahoo.com> wrote: > > Guys [quoted text clipped - 12 lines] > Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt > --------- Tel. 06151 162516 -------- Fax. 06151 164321 ---------- I've just taken a look. They would be perfect if I could buy one pcb from them, but they insist on two. If I could buy one then it would be a simillar price to pcbtrain but with the design rules I need. Anyone else out there? Colin >On 4 Dec, 23:28, Uwe Bonnes <b...@hertz.ikp.physik.tu-darmstadt.de> >wrote: [quoted text clipped - 22 lines] > >Colin At very low volumes, it is not uncommon for the 1x price to be little more than double the 2x price, and a spare proto board is often handy to have.... |
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