Electronics > Beginners
Is it possible to route this in 4 layer 5cm x 5cm?
ebclr:
"do not try to insult others, because you even can't follow yourself"
What did you smoke today?
mikeselectricstuff:
--- Quote from: soFPG on December 01, 2019, 05:34:43 pm ---My approach would be routing it like this and if it doesn't work out somehow re-arrange the components and then try again.
--- End quote ---
Placement is everything.
mikeselectricstuff:
--- Quote from: soFPG on December 01, 2019, 06:55:58 pm ---
I don't know if it is possible to do a oven-reflow of a PCB populated on both sides? If I only put lightweight caps on the bottom layer I could probably reflow them first and then do the top side while the components on the bottom side are taped with kapton?
--- End quote ---
You don't need to do anything to stop bottom-side parts falling off on the second reflow - surface tension will hold them.
Yansi:
--- Quote from: ebclr on December 08, 2019, 12:12:04 pm ---"do not try to insult others, because you even can't follow yourself"
What did you smoke today?
--- End quote ---
Your arguments are only supporting mine. Go outside and chill, please. I'll gladly follow, but please read the below first:
PCBWay is reporting me $51 for 100x100x4, JLCPCB is reporting $28 for 100x100x4 and even with DHL Express shipping included, I am still below the price of PCBway. Not sure where did you smoked out those 28$ for PCBway.
If PCBWay would be cheap, I'd have probably used it in the past - didn't happen, because it never actually was cheaper for any boards I did in the couple years back.
Maybe you see different prices, but I work with what I got. (Mainly through PCBshopper. And if some manufacturer happens to report incorrectly, sorry to them, but not my issue. I have also tried switching different countries, including EU and US. JLC still way cheaper, than your PCBway, for your original 100x100x4L suggestion.)
In any case, with any of these prices, I still do not see why an inexperienced designer shall push 0.8 pitch BGA on a small PCB, as hs first 4L design. That is not likely to happen. Any of these prices are more than likely couple times below what would a local pcb fab quote for a single prototype PCB.
OwO:
You are probably going to want to use the prototype assembly service though. I definitely don't miss manually soldering passives or even stencil + hand pick and place of 200 parts. That way I don't think about skimping on decoupling caps or stitching caps. and can do really dense boards. 5x5 cm is not necessarily a good deal though as you can get 4 times the prototype area for twice the price. I usually can fill a 10x10 cm panel easily and have done up to 10 different designs on a 10x10 panel (they don't charge extra if you don't add milling slots).
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