Electronics Forum | Tue Apr 30 12:11:05 EDT 2019 | slthomas
That's a good summary and the only thing I would add to that is maybe to include an image of the land pattern in your collection. Some of these asymmetrical parts are just about impossible to provide all of the dimensions for. For instance, who want
Electronics Forum | Tue Apr 30 14:56:43 EDT 2019 | SMTA-Joe
Thanks for the suggestions. This seems like the way I'll have to go; create my own database and hope something--one day--comes up the same specs!
Electronics Forum | Thu Nov 16 23:05:40 EST 2017 | slah6678
What is the IPC Spec for Golden Ground Pad Contamination with Solder ? Especially for Automotive product.
Electronics Forum | Tue Jul 30 21:44:13 EDT 2002 | sohct
Hi Anyone has experience in manufacturing RF PCB and encounter voids on the grounding pads? The grounding pad is covered by the a big component. Question is does voids in the solder joint affect the RF operation?
Electronics Forum | Wed Dec 11 07:05:28 EST 2019 | ameenullakhan
Hi, Below may help you out. per IPC 7093 ( Design and assembly Process Implementation for Bottom Termination Components ),Clause 6.1.5.3 voids on thermal pad up to 50% does not result in loss of thermal performance. Since the void criteria is
Electronics Forum | Fri May 14 16:49:17 EDT 2021 | winston_one
Agree with WiIIR and also can recommend to play with vaccum pump RPM . Slower vacuum increasing have help me to resolve one problem caused by the vacuum (it was solder splash from BGA balls, but the reason can be similar to your case). Also check i
Electronics Forum | Mon Apr 29 12:45:00 EDT 2019 | slthomas
When you say "....is there a way to easily (or at all) reference parts with the same specs..." do you mean when ordering stencils, or are you trying to drive your designers to choose a package that you already have in play when they have package opti
Electronics Forum | Sat Dec 02 10:23:47 EST 2017 | tomh
Have you ever heard of "Solder Mask Defined Thermal Pads"? I wrote a short blurb on this here - https://www.pcblibraries.com/forum/ipc7093a-btc-qfn-solder-mask-defined-thermal-pad_topic2154.html This technology saves fabrication costs by not havi
Electronics Forum | Mon Mar 11 06:49:42 EDT 2019 | SMTA-Bob
You problem will be related to the part type or the design. Standard 40 or 100 pin QFN or LGA parts are not going to drop due to weight as they are just a few grams. If you send a photo of the PCB pad footprint and the component separately I may be a
Electronics Forum | Sat Apr 27 09:47:27 EDT 2019 | SMTA-Joe
Hello SMTA, We currently use Solder Stencils for installation/rework of QFNs/BTCs, and have tremendous success with them. While they aren't overly expensive considering their high quality it does seem like a waste of money to purchase more screens
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