Electronics Forum: 1

Decoupling caps and PCB layout

Electronics Forum | Wed Aug 10 02:38:36 EDT 2016 | zxcvb

I guess I've been somewhat ignorant when it comes to the finer details of pcb layout. Lately I've read a couple of books that try their best to lead me on the straight and narrow. Here is a couple of examples of a recent board of mine, and I have hig

Re: COB module design / layout

Electronics Forum | Thu Oct 26 17:48:47 EDT 2000 | Dave F

In response to your questions: 1) Suggestions on substrate material FR-4 or something better? Most PBGA are on BT. That might good for you, also. 2) Are there design guidelines for wire bonding pattern on the substrate? Several things: 1 Doesn�t

Component Obsolescence and Availability

Electronics Forum | Thu Apr 07 14:05:53 EDT 2022 | SMTA-69080803

@cbart It's a mid-volume product and as I said, there are several boards (slightly different layouts) using the same component. When you say ISI, do you mean connectors? can you give me an example of what you used in the past?

BGA lands and ICT

Electronics Forum | Tue Mar 19 17:30:46 EST 2002 | rculpepp

Does anyone have or know of any published guidelines for BGA layout on PWB's so that they can be tested. Specifically using micro vias? If anyone has any input regarding other test considerations for BGA devices I'd like to hear from you as well. W

0402's and Gluing.............

Electronics Forum | Wed Feb 09 12:31:54 EST 2005 | russ

We are not doing this right at the moment but I have done it with great success. Of cource it depends on your pad layout we have a 20 mil gap in between pads, we printed at 10 mil wide with a 5mil stencil. I will try to find the glue we used, I kno

RoHS and stencils

Electronics Forum | Fri Mar 03 11:56:51 EST 2006 | Brad

We have a customer that is transitioning to RoHS compliant assemblies. Their layouts are not changing from the old boards to the compliant ones so the stencils will remain unchanged. They are going through a transition phase where both will be buil

Component Obsolescence and Availability

Electronics Forum | Thu Mar 31 12:13:28 EDT 2022 | cbart

That is a tough one because of package size I agree, as noted previously it would be good to know what the current PCB pad layout is. first thought does go right to an adapter board of course! is this a volume build or just 20-50 pcs? dead bug and ha

solderability and hasl thickness

Electronics Forum | Thu Sep 11 16:50:18 EDT 2003 | davef

Sure it's conceivable that thin HASL can cause tombstoning. Harkening back to the ample discussion in the fine SMTnet Archives, tombstoning is caused by an imbalance in solder surface tension between the two pads of SMT component. The source of thi

Tp9 and Tp9 ufp

Electronics Forum | Wed Oct 26 11:02:41 EDT 2011 | dyoungquist

TP9 machines are good, but old machines. We ran a TP9 for many years. As the machine got older it required more and more maintenance and had more frequent small issues similar to what you are seeing. We only saw 1 of your 4 issues specifically whi

Manual Pick and Place Manuals

Electronics Forum | Thu Sep 13 03:10:09 EDT 2012 | weyes

Optimize the pcb assembly layout can enhance the performance of the converter for switch-mode converters, excellent PCB layout is critical to the performance of the best system.If the pcb assembly layout is poorly designed, it may result in the fol

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