Electronics Forum | Fri Mar 28 00:56:50 EST 2003 | iman
we have a issue of post-reflow oven (SMT) soldering defects of blowholes and pinholes. Any suggestions or knowledge on root cause is appreciated to be share? BACKGROUND : we DI water wash and oven bake the PCB bareboards at 90deg-C for 60mins, to r
Electronics Forum | Sat Dec 18 01:53:46 EST 1999 | sin
If i have problem with tombstone, first i would look at the placement of my components. if placement is 50% greater on the pad, it would be ok to reflow. even you have bad profile, you would have some other problem not tombstone. then i look at
Electronics Forum | Wed Aug 02 06:48:56 EDT 2023 | kirill
Use T5 solder paste Make sure you dont have too much paste, usually 1 time printing instead of 2. Make sure the component is baked before production. Re-check your profile on the reflow. Could be also a bad pcb edit, nothing you can do there.
Electronics Forum | Tue Jan 20 20:12:05 EST 1998 | Mario Lapointe
SMT-ASSY is a training center located in Montreal, Canada. We are currently looking for representation in these area: Maine, New Hamphire, Vermont, up to Connecticut. SMT-ASSY offers many different training programs for though hole and surface moun
Electronics Forum | Tue Jan 20 20:09:33 EST 1998 | Mario Lapointe
SMT-ASSY is a training center located in Montreal, Canada. We are currently looking for representation in these area: Maine, New Hamphire, Vermont, up to Connecticut. SMT-ASSY offers many different training programs for though hole and surface moun
Electronics Forum | Wed Jul 20 18:08:38 EDT 2005 | russ
How long is it taking to reach the 150? We use the 020 here along with 023 and have very good results with our machine. The 023 is rated for a higher temp then the 020 but I don't know about staying power. We heat from both the bottom and the top
Electronics Forum | Tue Feb 19 09:26:54 EST 2008 | jdengler
The low solids flux that is commonly called no-clean can affect some circuits. We are building a PCB that measures pico amps. The customer required that it be cleaned. We would rather used the low solids and eliminate a step. The customer had
Electronics Forum | Thu Aug 06 16:32:38 EDT 2009 | markhoch
Yeah, those gosh darn disty parts...get you every time. lol Can we get just a little more info? Let's start with the basics... Stencil Thickness? Aperture Reduction? Leaded or Lead-Free? No-Clean or Water Soluble? How's your reflow? Have you prof
Electronics Forum | Thu Oct 28 08:28:33 EDT 2010 | d0min0
Hi, previous topics found closed so I couldn't continue on them, but wanted to ask maybe something that we don't already know paste shape and placement ok, reflow 12 zones profile looks ok (same since 2 yrs), component placement ok, one reference i
Electronics Forum | Tue Jun 25 15:30:49 EDT 2002 | Steve L
Hi everyone. I am now faced with a problem on soldering PBGA. At first, I ran the board (FR4, 7" X 10" with 12 layer) at Peak Temp: 205 C and 54 seconds above 183 C. After reflow, I found several cold solder joints and one ball without second collaps
