Electronics Forum | Thu Jan 16 17:54:12 EST 2003 | Ren�
Hi burb , reflow temps are same than other profiles just follow your solder paste recomendations , Will help you a lot a solder paste with Silver , or if you want to eliminate completely the granular looking , use nitrogen with your oven ( You will s
Electronics Forum | Wed Apr 08 11:33:51 EDT 2009 | 1036
2) STD FR4 material with HASL finish, 4 layer board. Reflowed under tin-lead temps with another 4 layer board same time(no delamination problem). 3) We uasualy do not pre-bake board unless board is too old. 4) We do not have the board on hand right
Electronics Forum | Tue Sep 09 12:05:44 EDT 2008 | tonyamenson
First and fore most is to find your paste manufacturer spec sheets. Read it over several times and let it all sink in. Then call them with questions as they want to keep your business so their engineers want to help you use their product. I assume y
Electronics Forum | Tue Jul 28 17:23:58 EDT 1998 | Robert Steltman
| | We are about to run our first BGA devices and would appreciate some confirmation on a few points. | | First some details: | | PCB & Device: | | ============= | | 1) 16 layer (4 power, 4 gnd, 8 signal) | | 2) gold on nickel finish | | 3) ceramic
Electronics Forum | Thu Jul 12 10:23:30 EDT 2012 | blnorman
Check with your adhesive manufacturer. In a previous life we had one line that was either double sided reflow or wave following reflow. When it was ds reflow, we just shut off the wave. When it was reflow/wave, we kept the reflow oven on with the
Electronics Forum | Mon Dec 11 17:19:12 EST 2006 | darby
Hi AJ, Thanks for the reply. I'm beginning to think that we have some issues with different expansion rates of the two pcbs. When you say you had some profile issues... Did you stay within the recommended UBLOX reflow time of 20 - 40 seconds and di
Electronics Forum | Fri Aug 27 00:26:14 EDT 2004 | charly
hi, encounter few cases PCB was delam after reflow, and the supplier was refuse that this is a PCB manufacturing defect as the fallout is low within one lot. the cost for this scrap is high after PCBA level, my query here are 1) is there any way
Electronics Forum | Tue Jun 28 09:13:46 EDT 2005 | russ
It appears that the reflow profile was incorrect or the paste was in bad shape on these boards from what I can see. I personally have never seen a board finish cause this symptom.
Electronics Forum | Mon Feb 12 17:24:51 EST 2007 | dave
250-260ish seems a little on the high side ? Depending on the board density and components 230-245 should suffice. Again time above is usually preferred between 30-90secs but again it really depends on the PCB Dave
Electronics Forum | Wed Feb 21 15:29:34 EST 2007 | wavemasterlarry
I here alot of guys at my place talking about cold spots in the oven. You may want to check for them in yours.
