Electronics Forum | Wed Sep 13 14:55:58 EDT 2000 | Mark S
Hi All -- I have read the IPC acceptability requirements of butt-joints, but haven't seen anything on how they're actually performed. I'm assuming we can trim a DIP package, and place the part onto paste immediately before relow (or hand-solder it l
Electronics Forum | Thu Sep 14 13:34:43 EDT 2000 | Boca
Of course the others have great answers, try NOT to do it, for all of their reasons. However, had to do it in the past, OEM, custom chip, die wouldn't fit in a SM package, volume wouldn't support a second package type ...... and on and on. So we us
Electronics Forum | Thu Sep 14 19:44:25 EDT 2000 | Brian W.
I cannot give references to papers, etc, but I can tell you from experience that High Impedance circuits and High Power RF circuits are not something to try no-clean on. For an aerospace customer, I had a circuit that any residue left between two pa
Electronics Forum | Fri Sep 22 16:45:32 EDT 2000 | Casimir Budzinski
It realy depends on what no-clean you use, I had on that would get under IC's and not get fully activated it was fine here in the states but when it was shipped over seas the salt air and humidity gave us fits, another we used didnt have that problem
Electronics Forum | Wed Sep 13 12:08:02 EDT 2000 | Dave F
Charlie: I'm with Wolfgang ... The prime cause of your cracked solder joint on a surface mount part is mechanical stress. That�s about as specific as you�re gonna get. More information would be helpful. For instance: * Talk about the distribution
Electronics Forum | Mon Sep 11 14:15:28 EDT 2000 | Gary
I am looking for some details about the failure modes in popcorned components. Does the component usually fail to operate. Is the damage likely to extend to the gold bond, wires, or substrate. We have experienced a high failure rate on a subset of
Electronics Forum | Mon Sep 11 14:07:26 EDT 2000 | Steve
Hi ya'll!! We've got some PCB's in receiving inspection that has these little nodules in plating inside all of the barrels. These are microwave PCB's and have almost all of the surface area on both sides covered with with solid metal planes, and no
Electronics Forum | Thu Sep 07 12:42:53 EDT 2000 | Vincent Geesing
Hi, my name is Vincent Geesing. I�m a student computer engineering in the Netherlands. We (me and 3 other guys) are developing a motorized car who can find his way himself. The car must go straight and avoid some obstacles on his way. It drives in a
Electronics Forum | Wed Sep 06 20:31:10 EDT 2000 | Dave F
Randy: My druthers on sources for SMT land patterns, in decreasing preference order are: 1 Manufacturers' recommendations. The problem with manfacturers' recommendations is that someone must make the effort to obtain them, document, and use them.
Electronics Forum | Tue Sep 05 16:04:43 EDT 2000 | Dave F
Pascal: Responding to your questions: 1 Do we have to dry the PCB after cleaning (sic)? Generally, nothing says you have dry the PCB after aqueous cleaning. Along this line, I received several thoughtful responses when I posted a similar thread.
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