Electronics Forum | Sun Apr 24 09:12:00 EDT 2005 | davef
We're not sure what your customer is talking about either. Gold and tin form an intermetallic compound [IMC] that can cause poor solder connections. To minimize the potential of a problem, keep gold to less than 3 percent of the metal. [Search the
Electronics Forum | Sat Jan 30 16:42:32 EST 2016 | davef
Many board fabs help their customer understand the importance of copper balance. Copper balance * http://www.multi-circuit-boards.eu/en/pcb-design-aid/copper-balance.html * http://electronics.stackexchange.com/questions/85633/what-is-copper-thiev
Electronics Forum | Fri Jul 17 04:18:54 EDT 2020 | sara_pcb
I am looking for test setup for accessing through hole & surface mount soldeability of PCB. Who are the suppliers of wetting balance type test setup
Electronics Forum | Tue Jun 19 07:20:43 EDT 2007 | sami
Dear Fastek. For the Front panel board we are using multible ( 4 boards in one PCB. even thought the balance between the DEK printer and the placers still big 6 sec as a difference. But, may be this is a good idea for the main board? may be also it's
Electronics Forum | Tue Jan 30 11:14:25 EST 2001 | svenson
I have an idea of trimming the resistors on a teflon PCB (FR4) after mounting and soldering. Can I use a laser to cut on a smt mounted resistor while the PCB is in functional test? The goal is to balance the resistances for a telecom application. Ha
Electronics Forum | Mon Aug 11 17:42:52 EDT 2003 | Kris
How can one go about defining the complexity of a PCB for characterizing reflow profiles A large balanced board may be easier to profile than smaller unbalanced board ? Any ideas how to define an index to calculate the complexity based on size,weig
Electronics Forum | Fri Jun 25 15:04:39 EDT 2010 | siddharth
Thanks for you suggestions, guys. davef, I am gonna get with my PCB suppliers and talk to them about copper balancing and checking the Tg of the materials they use. SC, I am working towards designing wave pallets for my boards and try your suggesti
Electronics Forum | Sun Mar 03 22:15:13 EST 2002 | caldon
RPS (Robtic Process Systems - I think) Makes a system called a Wet Balance tester. This machine is useful for Solderability on PCB sections and Components. Also for more info please go to http://www.empf.org/html/empfset.htm and down load Decemeber
Electronics Forum | Fri Dec 17 10:42:58 EST 2010 | hegemon
I believe there is a lot pertinent information in the thread that Dave forwarded... But (IMHO)I think you can look at two things first. First, is your wave solder process friendly to this large PCB, is there enough pre-heat in the board before it h
Electronics Forum | Thu Jun 24 15:33:56 EDT 2010 | davef
Our best suggestion - get the copper balanced and if possible go to higher Tg materials.
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