Electronics Forum | Wed Jan 06 10:25:15 EST 2016 | swag
I've done more if this that you can possibly imagine. I've designed 100 or more router fixture plates. It's not always easy that's for sure. We use a Cencorp router. It does O.K. but definately a little tricky to get nice cuts in the flex only ar
Electronics Forum | Tue Dec 29 03:35:10 EST 1998 | Earl Moon
| I am looking for a questionaire/list of items that need to be addressed to determine the pros/cons and equipment, manpower, cost and lead time to determine if one should consider setting up an in-house SMT line. | Can anyone help? | thanks | | L
Electronics Forum | Thu Aug 15 15:44:46 EDT 2002 | dragonslayr
You can't control what you don't measure. You have provided very little detail other than post reflow costs are high. What defects are attributed to problems experienced prior to reflow? Are these random or recurring defects? You will need to put ea
Electronics Forum | Thu Mar 29 15:29:11 EST 2001 | johnw
measuring Paste volume or at least paste height is an essencial part of any SMT process. You've got to control those input's.... Paste volume determines how much solder is available for your joint so theres a direct to joint reliability / PCB reliabi
Electronics Forum | Wed Dec 01 13:19:52 EST 1999 | Wolfgang Busko
Hi Dick, first of all I will not judge what�s the best in your case for I don�t know all details of your situation. Just my opinion: As a matter of fact the amount of THT is rapidly decreasing compared to SMT. So, to stay in assembly business it vita
Electronics Forum | Wed Mar 18 09:03:57 EST 1998 | Earl Moon
| 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 ce
Electronics Forum | Wed Mar 06 21:24:09 EST 2002 | davef
How could you know if your printing process is capable or in control if you don't have a print measurement tool? You�re correct that you do need a measurement tool to determine if the process is capable or in control. A $1.5k microscope and some g
Electronics Forum | Fri May 21 15:40:58 EDT 1999 | JohnW
| | | hello...can somebody help me regarding the POPCORN at Reflow. What is this POPCORN at reflow, what it looks like, its cause and corrective action if there is... | | | | | | your help is greatly appreciated...thanks | | | | | | omat marasigan
Electronics Forum | Mon Mar 04 17:52:59 EST 2002 | davef
Yes, providing the surface of the via is solderable. * If so, how much paste? => Vias come in various sizes. Boards vary in thickness. So, the amount of paste to fill a via varies. Roughly, you�ll need twice as much paste as the volume of the via
Electronics Forum | Wed Nov 21 12:29:52 EST 2001 | mparker
Now that we know where you've been and what you wish to accomplish next, I can still give you some suggestions. 1. Get IPC-7912. Use it to evaluate your CM's. Especially if you have multiple contractors supplying like products. You will quickly see
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