Electronics Forum | Wed Jul 09 16:05:12 EDT 2008 | bkreiman
We are using a right-angle SMT power connector on a board. The connector has 4 leads and two board alignment pins. The layout for the board is such that 1 of the leads is not used and the pad for the lead is not connected to anything, not even grou
Electronics Forum | Mon Oct 04 15:10:42 EDT 2010 | 18424
Hi Michelle, Due to the dense population of through hole on some boards, after a 35 minute wash, some connectors or battery holders remain wet. Currently we put them into drying ovens at 70c for a Minimum of a half hour. We do occasionally air dry un
Electronics Forum | Fri Jun 24 09:32:53 EDT 2011 | kahrpr
Looking at the appearance of pads and solder joint is pretty subjective. Especially lead free people are all over the map on the physical appearance of pads and joints. The true test is solderabilty testing, weather it’s just looking for good wetti
Electronics Forum | Tue Apr 22 12:33:35 EDT 2014 | barryg
No we have a battery spring that is soldered directly to a PCB (standard tin plated copper PCB). The Battery spring supplier (and I have no confirmation he makes them or buys them) claims they are tin plated. When trying to solder to them it is very
Electronics Forum | Fri Oct 12 12:12:13 EDT 2018 | davidsmullins
We have some fairly standard 0.1" pitch, two row, shrouded, through hole headers soldered onto a thick backplane. There are tiny inspection holes along the bottom edge of the plastic body that allow an inspector to observe the top of the through hole
Electronics Forum | Mon Oct 25 21:19:06 EDT 2004 | davef
Q1: I thought we have a industry standard for this. A1: We're unaware of such a standard. IPC-7525 - Stencil Design Guidelines has a brief section on stencil inspection. We've talked about it previously on SMTnet. If you can't find it in the Archiv
Electronics Forum | Tue Dec 14 17:02:04 EST 1999 | John Thorup
Hello Kris If you do have and OSP coating I'd say Curtis has nailed it. But you seem to have references to gold. Does this board have a standard nickle/gold finish. If so what sort of "solder on gold" problems were you having? Reading between the
Electronics Forum | Sun Nov 24 09:54:24 EST 2002 | davef
On a HASL board that has poor wetting on the pad, consider looking further downstream in the process than your assembly shop. For instance, take a look at the bare boards. Look for solder mask bleed onto the pads. This will show-up on the outside
Electronics Forum | Thu Jun 24 12:43:08 EDT 1999 | Earl Moon
| | Recently, there has been an upsurge in the Pin Hole/Blow Hole problem in our wave soldering process. We are baking the PCBs for 2 Hrs. at 125 degree C. The Wave Soldering profile seems to be O.K. Still the problem is persistent. Can somebody h
Electronics Forum | Mon Jul 30 18:07:22 EDT 2001 | mparker
Kenny- there are a few standards by IPC and EIA that address the strength of solder. A pull test (which is a destructive test) will average 1500 PSI per joint. My concern is that you are wanting to increase solder volume for an 0805 component by inc
