I'm considering using a 0.031" thick FR4 PCB for my next design. What has been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
Thanks,
Darol Klawetter
your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
No problems here.
--
John Larkin Highland Technology, Inc
jlarkin at highlandtechnology dot com
Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
Have done 0.02" (2-layer) with no problems.
If your 0.031" board has more than 4 layers it might be an issue.
been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
I'm planning on 6 layers. Stackup is as followins
1 oz Cu 1 Sheet 106, 1 Sheet 1080 1 oz Cu 0.005" Core 1 oz Cu 1 Sheet 106, 1 Sheet 1080 1 oz Cu 0.005" Core 1 oz Cu 1 Sheet 106, 1 Sheet 1080 1 oz Cu
your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
That's a nice size but one time we got carried away and forgot to check the rail specs a extruded aluminum chassis's we had already purchased, had to machine them a little to get the boards in.
If you don't have any problem there then thickness shouldn't a factor.
We visited a tyco facility once, watched them do some 64 layer boards but I guess that isn't the limit, but it sure was interesting to say the least.
Jamie
as been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
we do 10 layers in ~1.5mm (~0.06")
board thickness put a limit on via and hole sizes, thicker board and the holes need to be bigger
-Lasse
been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
Yep. That's the reason we're starting to go to less than 1.5mm (1mm, IIRC) boards; can't do the vias on .5mm BGAs. Don't know that we're going to actually do any products with .5mm BGAs but we need them for prototypes.
t has been your experience with 0.031" PCBs? Have you had durability proble ms? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
occould do blind/burried vias, the problem is plating deep a shallow hole, vias that only go through part of the stack shouldn't have that problem
or maybe via in pad will work
-Lasse
your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
I have used PCB material down to 14 mils with no problems. Then again,what i used was equivalent to Getek (Megtron). To 200C no sweat.
We ordered some FR5/G11 recently and it was a task to get it here in the states in small quantity. But we did manage to get
3/16" thick and sure works well for HV plus structural strength:)Jamie
"Jamie" wrote in message news:3qims.20003$ snipped-for-privacy@newsfe13.iad...
Some day I might build a particularly high performance planar transformer, using a PCB stack thicker than it is wide.
A number of manufacturers are offering "heavy copper" these days (> 10 oz.), pretty cool.
Tim
-- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms
has been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
We do some of that, but it's expensive and I don't know if the process is qualified for production. OTOH, thin boards have their own set of problems.
No, that doesn't solve the l/w limit on vias.
been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
I've seen 1 and 2 mil FR4. It makes a pretty nice flex circuit, better than kapton in many ways.
What has been your experience with 0.031" PCBs? Have you had durability pro blems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
to
aer
g to
,'re
it doesn't solve the l/w limit, but it may be possible to route with the bigger vias when you have the vias in the pad and don't need to fit them between the pads
-Lasse
your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
The only issue I had was with small panelized boards. The panel was scored but the gorilla that separated them managed to induce invisible cracks in ceramic caps near the edges. On the next run I re scored the boards and separated them without flexing.
-- Boris
been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
At the PPoE they had problems with traces cracking after panel separation. The solution was deeper scoring and larger mouse bites. Make sure there is a decent setback for any planes or signal traces, as well.
has been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
Yes, I see your point, but the via then has to be plugged - even more expense.
been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
How about snapping them over the edge of some 'Die Knife', like they use to make cuts in cardboard boxes? It comes in long strips and is sheared to length, then a thin router bit cuts a groove into plywood to hold it. A rubber mallet is used to tap it into place. Ad an adjustable backstop with a lip to keep the board level will help you align the score on the sharp edge & snap it off without spreading all the stress through the boards.
I don't have any scraps left, but any company that makes the dies for cutting cardboard boxes will have some. A lot of box companies do it in house. Every plant I was ever in had the tools & supplies to make & repair the dies.
been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
Eventually the impedances get to be impossible. If the dielectrics are thin enough, you can't fab a 50 ohm trace any more.
-- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
snipped-for-privacy@att.bizzz a écrit :
been your experience with 0.031" PCBs? Have you had durability problems? Did it complicate manufacturing? My PCB will be roughly 3" x 3".
I have a small board (8mm dia) that's top&bottom stuffed with 0402,
0201, uBGA,... and we also needed some accuracy on the max board diameter.Usual separation was... scary, at least, so we ended to laser cut them: fast, accurate, no strain. What's more to be desired? Ah, yes, low cost...
-- Thanks, Fred.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.