Electronics Forum | Fri Sep 15 09:24:54 EDT 2000 | C.K.
At my last place of employment, that was the big reason why nobody (especially the Design Engineers) bought into a no-clean process - interference with high-impedance circuits. One guy was so paranoid about flux residues remaining on the board, that
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 | Mon Sep 11 09:39:31 EDT 2000 | Chris May
Charlie, Check: a)That your wave is not too high/powerful as this will push up components due to force exerted by mass of solder b)That your conveyor is set at optimimu height so that a) is not required. If conveyor is too high, then the wave will
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 09:06:05 EDT 2000 | Wolfgang Busko
Randy: Seems you have a long way to go to DFM. To your strategy: - proof that in the case of wrong landpattern design the IPC would have been the better choice - count money ( what�s the cost of redesigns due to bad landpatterns ) - establish at leas
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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