Electronics Forum | Wed Oct 04 16:54:24 EDT 2006 | cw
OK. Thanks!! Lastly, is it the nature of the chemistry that Sn/Pb solder mixed with Pb-free alloy will be getting voids? If so, what's the physic/chemistry behind it?
Electronics Forum | Fri Oct 27 08:19:53 EDT 2006 | davef
Josh: Search the fine SMTnet Archives for background discussions. For further discussion on the "being hosed by the physics": http://www.cooksonsemi.com/tech_art/pdfs/Controlling%20Warpage.pdf
Electronics Forum | Tue Jan 23 16:53:45 EST 2007 | patrickbruneel
Can not be done without drastic alterations to the laws of physics Patrick
Electronics Forum | Mon Jan 29 07:44:53 EST 2007 | davef
On going from 24v to 18v, try: * Voltage regulator * Resistor divider * Transformer On not generating heat or loosing energy, the laws of physics already are pretty well fixed.
Electronics Forum | Sun Dec 23 00:11:43 EST 2007 | ktroym
When I try to bootup the machine I am getting an error that reads Dumping physical memory and a bunch of numbers & letters on the screen. The machine runs windows NT. Has anyone else had a problem like this before.
Electronics Forum | Fri Jan 04 16:15:05 EST 2008 | ck_the_flip
Good move. Again, stainless can NOT be soldered with standard materials used in electronic manufacturing, as everyone agrees in this thread. Additionally, the physical properties of stainless have to be altered in order for soldering to take place.
Electronics Forum | Sat May 31 09:49:55 EDT 2008 | gregoryyork
physically lift board of after fluxing to visually see what is covered, or using thermal fax paper to get to see coverage works well. PROPER low residue or no residue fluxes leave benign insulating residue behind not corrosive.
Electronics Forum | Thu Jul 10 16:09:37 EDT 2008 | patrickbruneel
CK, I agree with you totally except for the �art� part. Soldering is a �science� of primary physics in nature. The European commission also looked at soldering as art (not science) and thought that RoHS would just change the materials the artist ha
Electronics Forum | Tue Aug 25 13:30:35 EDT 2009 | rossi
It appears that the crack is between the paste and the ball. We physically pulled off the BGA by force and almost all the balls broke at the PCB. There was a thin layer of solder left on the pad. Maybe 1% of the balls stuck to the pad. I have attac
Electronics Forum | Fri Oct 09 03:57:00 EDT 2009 | martinphill
There are two fundamental questions that must be answered, in order to manage the inventory of any physical item - when to order and how much to order.? Is there any spread sheet available to trigger Minimum , Maximum & critical levels ?