Electronics Forum | Thu Dec 09 23:57:41 EST 1999 | Jeff Sanchez
Mike, A drag solder system is not so bad. If it's not discoloring the silk screen , damaging your parts or blistering your boards than it looks like a safe bet. I am not sure what other components you have on the boards besides the LED's? But the
Electronics Forum | Thu Jun 24 13:12:15 EDT 1999 | MD Cox
| Dear guys, | | I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are now usin
Electronics Forum | Thu Jun 24 15:44:12 EDT 1999 | Earl Moon
| | Dear guys, | | | | I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are no
Electronics Forum | Mon Apr 19 20:49:13 EDT 1999 | Dave F
| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185
Electronics Forum | Mon Mar 16 18:15:32 EST 1998 | ETS, LLC
Problem occurs because the glass transition temp for FR4 is lower than reflow temperature. Our company wrote an article which was printed in SMT magazine some years ago that deals with this exact subject. Best way to deal with this is to use a center
Electronics Forum | Fri Nov 25 15:52:40 EST 2011 | davef
"IPC-2221 - Generic Standard On Printed Board Design" talks to fiducials. Anther take on fiducials says they shall meet the following requirements. * Make fiducials 1 - 1.5 mm diameter circle. * Cover fiducials with tin. * Keep solder mask opening at
Electronics Forum | Tue Apr 24 09:30:43 EDT 2012 | bdamico
Hello Laritzstange, My name is Brian D'Amico, I am the president of MIRTEC USA. I noticed your posting on this forum and I would like to offer some guidance. First, I would like to ask which system you have. Our MV-7 system is an in-line system.
Electronics Forum | Thu Apr 05 06:59:30 EDT 2018 | philc
Here, there are two possibilities - either it is a new board to us (ie built elsewhere previously) or it is a new product for the company requesting the build. If new to us only, ask for a sample PCB. You will need CAD data for pick & place machines
Electronics Forum | Sat Jun 12 08:50:41 EDT 1999 | Dave F
| I am trying to find out as much information as possible relating to conductive inks. | | If anyone out there is using them please give some advice. | | 1) How are you curing the ink? | 2) What type of substrates are you using and who supplies
Electronics Forum | Tue Jul 19 08:12:23 EDT 2005 | davef
We agree with Rob. It looks like either kiss is blowing the paste around. It could be: * Nozzle id too large. * Kiss is occuring after the head has moved from the component. 0408%20MS%2001.jpg - Paste is not missing on the bottom-center pads. It is
