Electronics Forum | Wed Feb 02 22:10:30 EST 2005 | T2
Higher Tg values are only one thing to look out for. Two other things that are very important to watch are the Td or Decomposition Temperature (the temperature that the epoxy actualy starts to break down), and the CTE for the material. Some Tg 14
Electronics Forum | Wed Apr 19 20:33:14 EDT 2006 | davef
I just flew in from (insert city) and boy are my arms tired. pr: Likely, you're correct. The "pound-inch" units should have been the give-away, for us. Good catch. If this is the case, the frame fabricator would be the best source for tensioning
Electronics Forum | Tue May 02 12:50:44 EDT 2006 | grantp
Hi, Yeah, it's a nightmare, and we are dealing with suppliers such as Xilinx and many others who have lead times that are now 20 weeks, but they can get you lead parts on 4-6, because they did not plan correctly. Lead free is not something that's ha
Electronics Forum | Thu Mar 01 22:21:06 EST 2007 | davef
From our notes ... An intense evaluation was completed in 1992 that involved testing of three board types [6 layer FR4, 6 layer ceramic copper thick film, and a 4 layer copper-invar-copper board] by the Navy Surface Warfare Center, Crane, IN. [Obvio
Electronics Forum | Fri Jul 09 18:48:55 EDT 2010 | rway
I hope I understand your question, but are you saying you're having trouble meeting demand? Keep a log of the time that the machines are down, probably for 4-6 weeks would be good and this may give you a good idea of what kind of downtime your worki
Electronics Forum | Wed Apr 10 15:05:23 EDT 2013 | microaide
I followed your instructions and did NOT select the option to break up the program for separate central controllers. I now have a program I can copy to central controller #1, and I can delete the head 2 data from the program. Now when I select RUN TH
Electronics Forum | Sun Mar 01 04:24:06 EST 2015 | 3dpcb
Thanks Sarason, You are right that chemists and physicists now have some new tricks. Using nano-chemistry the physical properties of the materials change. The melting temperature of our nano-particle silver is below 150C. The insulator is also a nano
Electronics Forum | Tue Sep 07 17:12:34 EDT 2004 | davef
No one knows what type of board you use. So, assuming you're talking a fairly standard FR4. Q1a. actually, what is max temperature and duration can a bare PCB reflow without any quality problem? A1a. We'd guess your board could take 250*C for may
Electronics Forum | Thu Apr 13 11:38:53 EDT 2000 | Kevin Facinelli
Couple more questions: The problem we have is that on the bottom side we are using a bunch of resistor networks. These have been very difficult to solder through the wave. The products: Top Side: 4-6 BGA 2/3 QFP 500 component
Electronics Forum | Mon Jul 23 12:50:03 EDT 2001 | nwyatt
In brief, most companies have a board loader, a screen printer machine, various part placement machines (usually at least one chip shooter for small parts and one for fine pitch and larger components), and then a reflow oven. (inspection equipment i
