Electronics Forum | Tue May 31 20:20:54 EDT 2005 | Rob
Hi, I was informed that our supplier of PWB's will start using RoHS compliant Materials but will still support HASL. And these are the materials that they will use: Standard FR-406-408 High Temp - polyimide, cyanate ester High Temp - Roger's, Teflo
Electronics Forum | Tue Feb 19 11:28:29 EST 2013 | pbarton
We use a number of conformal coating materials. When you say you think you want to use a UV material do you mean UV cure, or just material with a UV trace for inspection purposes? For selecting appropriate materials take a look at IPC-HDBK-830. Keep
Electronics Forum | Fri Mar 29 09:05:16 EDT 2019 | SMTA-Jon
The oil is a carrier for the filler material that actually transfers the thermal energy. Without the oil, the material would just be a powder that would not be easy to apply or keep in place. You should mix the oil back in. Separation of the filler
Electronics Forum | Wed Feb 10 08:10:26 EST 2010 | davef
Here is a posting by P Kinner at Humiseal ... Typically, there are three main approaches to avoid coating wicking into press-fit connectors (and other keep out areas). Wicking is a phenomenon caused by a combination of low viscosity of conformal coa
Electronics Forum | Tue Nov 01 10:06:00 EDT 2011 | davef
Humiseal says: Typically, there are three main approaches to avoid coating wicking into press-fit connectors (and other keep out areas). Wicking is a phenomenon caused by a combination of low viscosity of conformal coating material and strong capilla
Electronics Forum | Wed Nov 15 09:36:27 EST 2006 | Board House
Hi AJ, The biggest mistake in the industry today is documentation for lead free assembly required product. We are still seeing prints coming in saying Lead Free / High TG FR4. When in reality standard FR4 170 Tg. material is considered High Tg. and L
Electronics Forum | Tue Aug 22 13:05:32 EDT 2006 | Board House
Hi CP, From a PCB manufacturing side, all of our product is Lead free / RoHs compliant if it has a surface finish other than Hot Air. To be ROHS compliant and Able to with stand Lead Free Assembly, this is where the board house would need to switch
Electronics Forum | Tue Jul 16 21:28:41 EDT 2002 | davef
Questions are: * What is this green material? * What does the green material look like? * What the impact of this material on the long-term reliability of your customer�s product? * What flux did you use to solder these boards? * How were the boards
Electronics Forum | Fri Dec 21 09:24:33 EST 2007 | rgduval
Andy, I think you'll find as many answers to your questions as you have people that post them. To that end, here are mine: Planning to pay off the machine...we took it as an overhead cost, and didn't directly correlate cost of the machine to job co
Electronics Forum | Fri Feb 25 16:04:18 EST 2000 | Dave F
Sze-Pei: Are talking BGAs here? Flux type? Profile? Pad material? Aperture size? We won�t want to give people too many hints on what the problem is would we? BGA voiding is a function of materials, methods, environment, and human factors. Con
