Electronics Forum | Tue Jul 31 20:12:01 EDT 2001 | davef
If you've told your experts in Germany and US as little as you've told us, I'm not surprised they don't know dip. Sorry, I just snapped there for a moment. That wasn't politic, was it? Yes, it is possible that the other solder connection on this c
Electronics Forum | Thu Sep 03 10:04:14 EDT 1998 | Earl Moon
| Can any one tell me if there is a large difference between green soldermask and blue soldermask, in reference to sending the board through the IR reflow oven. | - two PCB's (smc parts) are manufactured, the first has green soldermask, the second bl
Electronics Forum | Tue May 26 18:17:22 EDT 1998 | Jerry
Our experience has been that mechanical crack occur vertically through the chip. In other words perpendicular to the board surface. You can sometimes tell through close inspection that the crack may have propogated from a point that the nozzle may
Electronics Forum | Thu Jul 08 19:58:18 EDT 2004 | rtaft
Hello, I have been tasked with updating our PCB cleaning sytem, of which I know little about, and could really use some advice. We are a small company and we hand solder our electronics to IPC standards. Our electronics are mission critial communic
Electronics Forum | Wed Aug 18 06:34:57 EDT 2004 | Bernard Mulcahy
Hi , Our hardware designer wants to introduce a board with a straddle - mounted SMT connector, AMP part number 84487-1 and FCI 71292-001. This is an 80 pin connector that slips over the edge of the PCB and has 40 SMT pads on either side (at least thi
Electronics Forum | Tue Jul 12 20:19:22 EDT 2005 | Tom
Don't mind Sam Adam's and Asahi beer... I'll send you a tantelising pint of Guinness, cool and with a fresh creamy head if you can help me with the following.... What do I do about lead free stencil design? Is there a guideline anywhere? Most lead fr
Electronics Forum | Wed Aug 27 08:06:43 EDT 2008 | davef
Thick, hard conformal coatings of acrylic, urethane and epoxy have a well documented history of causing solder joint cracks and breaking glass/ceramic and other brittle components. Dissimilar expansion and fairly high surface bond strengths of the ma
Electronics Forum | Wed Apr 15 17:16:00 EDT 2009 | rmitchell
Hi, I am trying to reduce some 0402 cap tombstones. The main cause is the pad spacing is a little too far apart and the parts are as tall as they are wide .5mm I am stuck with the pad spacing for a while. All other parts are soldering well, even 0
Electronics Forum | Sun Nov 01 01:33:52 EST 2009 | isd_jwendell
Just my opinion: Top pic - Solder mask registration WAY too far off, without a doubt I would reject. Bottom pic - I would worry that there was/is a contamination that caused the poor looking mask. This may be cosmetic only, but unknown. I would rej
Electronics Forum | Fri Apr 04 18:16:43 EDT 2014 | garym4569
We are in the process of launching a new product and found reflow solder issue with one of the inductors. I have set oven profile to paste specifications. I just finished profiling with thermocouple under problem component. All other components ex
