Electronics Forum | Wed Apr 08 11:05:53 EDT 2009 | boardhouse
Hi, Need a little more info, 1) this board is definitely delaminated 2) this board looks like a Std FR4 board with 63/37 Hot air finish with probably 140 tg. material. Was this reflowed under lead free temps? 3) Do you Pre-bake product 4) What
Electronics Forum | Sat May 09 09:00:54 EDT 2009 | davef
For more on using tin as a resist during bare board fabrication, read "2.5.6 Introduction To Tin And Tin/Lead Plating" here: http://books.google.com/books?id=etfNcpiR5ZUC&pg=PT570&lpg=PT570&dq=%22circuit+board%22+%22etch+resist%22+%22acid+sulfate%22&
Electronics Forum | Sat Jun 06 15:54:36 EDT 2009 | dilogic
A view from my perspective - EU is becoming over-bureauocrated mastodont (e.g. now they have 23 OFFICIAL languages - meaning each document HAS to be translated to ALL of them), resulting in such idiotic laws as that RoHS initiative. It's similar to c
Electronics Forum | Wed May 27 18:19:58 EDT 2009 | dcell_1t
yesterday I tried with vision type 20, just defined the two pair of leads and error 1CA14003 came up, on flexa error help says the following: Cause: The Vision_type in part data is expressed using hexadecimal notation (??). If ?? equals 0A, 0B, 0C,
Electronics Forum | Fri Jun 12 12:01:07 EDT 2009 | sadamson
Hi I work for Asymtek, so you know my affiliation up front. I just want to mention that Asymtek makes conformal coatings sytems from Bench tops to full auto in- line systems. We have applications labs in the USA and around the world to help companie
Electronics Forum | Thu Jun 11 10:02:36 EDT 2009 | dyoungquist
Our cleaning process involves the assemblies being completely immersed in the water bath of the ultrasonic cleaner. The assembly has a QFP44 on it. Customer stated that when these assemblies have been cleaned with water in the past (at a different
Electronics Forum | Thu Jun 25 22:25:24 EDT 2009 | boardhouse
In the life of this product that you have been doing this process, has the material alway's been IT180 material? One problem with Lead free material is that it is more fragile that standard FR4 Epoxy laminate. And is known to have chipping or fractu
Electronics Forum | Thu Sep 03 10:14:01 EDT 2009 | bk
Probably you can weld the spot that is leaking as a temporary fix.As for a long term solution, I would probably go with a lead free retrofit kit.It is basically a titanium insert that you place into your existing pot and it is cheaper then buying a n
Electronics Forum | Fri Oct 02 11:23:08 EDT 2009 | floydf
Does anyone out there have experience soldering > with Pb solder (Sn 63 or Sn 62) to SAC 305 coated > PCB lands (about 50um) or Sn-Cu plated lands > (about 10um). I know soldering Pb free (Sac based > soler) to Pb/Sn coated lands is a no-no, but
Electronics Forum | Tue Oct 20 18:53:13 EDT 2009 | fdbittner
Having some issues with 56 contact TQFN. This is low-run prototype situation so no second chances - unfortunately. Part is 5mm X 11mm with .30X .63 perimeter lands and 2.5 X 8.5 thermal pad in center. Issues noted are intermittency at test (basica
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