Electronics Forum | Wed May 29 22:09:59 EDT 2002 | davef
Retesting is reasonable, but using paste the has an expired shelf life is dicey biz. * Use fresh paste * Buy in small containers Sure it's expensive to toss, but the price you pay in rework and defective product may be higher.
Electronics Forum | Thu May 30 11:30:05 EDT 2002 | Hussman69
I bet your vendor would take it back and replace it for free. Never hurts to ask. Otherwise toss and use fresh - why chance a career on it. Plus, Murphy's law says if you do use it, you will have unexplained anomalies that will force you to questi
Electronics Forum | Wed May 29 14:58:41 EDT 2002 | R.Barcelos
There has been an increase in the number of defects regarding the solderability of resistor network arrays(pin opens specifically). Has anyone else experienced this? Also, does anyone have any FYI that they would like to share?
Electronics Forum | Wed May 29 22:00:19 EDT 2002 | davef
Not sure of the package style or the specific problem you're talking about, but consider searching the fine SMTnet Archives since we have talked about this previously, several times.
Electronics Forum | Tue Jun 04 18:03:25 EDT 2002 | arzu
I recognize this problem as well, building only prototypes with all attention possible, the (small) networks need extra attention for they show opens. Maybe it helps to increase the placementforce a bit to increase the contact area to the paste befor
Electronics Forum | Wed May 29 22:02:16 EDT 2002 | davef
Russ is spot on!!! [Although, he maybe talking uin rather than micron.] Search the fine SMTnet Archives for more.
Electronics Forum | Fri May 31 06:31:44 EDT 2002 | ianchan
why not use "flash Au plating"? its supposed to be somewhere in the thin layers of 3-5um Au thickness... then again I never used it before either, might want to check with your original parts supplier is this feasible?
Electronics Forum | Mon Jun 03 06:40:54 EDT 2002 | ianchan
Fair greetings, just a thought on flash gold plating... stubborn brat am I?! thou shalt need to know whether the selective gold plating is for solderability enhancement purpose? or any other undisclosed purpose? at least thy hast not received any i
Electronics Forum | Thu May 30 08:04:25 EDT 2002 | zanolli
Hello Russ, I'm not quite sure I understand your question. Are you saying that you must hand solder these connectors because the gold plating doesn't allow other though hole processing methods to wet the solder the length of the pin in the PTH? Reg
Electronics Forum | Fri May 31 09:13:12 EDT 2002 | russ
Jim, you are right in this. these connectors have long pins 1/2" or so that protrude through the board and are used for mating into a female connector on some other assembly. due to both length and "no solder allowed in contact area" criterias thes
