Electronics Forum | Mon Mar 02 04:20:27 EST 2009 | emmanueldavid
Glossy/Matte & Plating). 2. Select Solder Paste according to Your Customer or In-House Specifications which is compatible for expected Process. 3. Use Chemical Etch / Electro Polished Stencil with proper Aspect Ratios (AR=>1.5) & Area Ratios(ArR=>0.6
Electronics Forum | Sat May 31 14:33:59 EDT 2003 | kenBliss
CAL Here is another perspective. Ask what is included in the setup costs, ie. programming, stencils, setting up part number bins, bill of materials, changeover time on the line etc, etc. Then ask how much time and costs the CM is allowing for each
Electronics Forum | Thu Oct 30 09:15:20 EDT 2008 | kingshar
Hi, Hi, 1) Can anyone tell be what is the acceptable manufacturing tolerance from stencil to PCB . 2) what are the methods we can avoid that. 3) What is the method to avoid PCB shrinkage. 4) How can we correct shrinkage 5)Is there any standard gud
Electronics Forum | Fri Oct 31 08:02:14 EDT 2008 | davef
Here is some more reading on stencils for you: http://www.smtinfo.net/Db/_Stencil%20Printing.html
Electronics Forum | Fri Oct 31 06:55:35 EDT 2008 | andrzej
Answer on point 2 - I understand you send him gerbers of single PCB (?). In most cases you have panelized PCBs so to avoid problems with stencil first you should order PCBs and ASK your PCB supplier to send you back his gerbers of panel. There are so
Electronics Forum | Fri Oct 31 07:15:39 EDT 2008 | kingshar
Hi Andrzej, Thank you for your suggestions. The Link which you referred is really informative. Thanks and Regards, Kingshar
Electronics Forum | Sun Jul 30 18:07:34 EDT 2006 | Grant
Hi, Yes, it seems the case, and it's something I am thinking about all the time. I am sure the guys who ran your company thought it was doing ok at the time, and I think it's a lot easer for things to go wrong than you imagine, but at the top it's h
Electronics Forum | Fri Feb 15 08:44:42 EST 2008 | mmjm_1099
FYI, Here are the steps in which we take to get approval. The stencil gerber layer needs final approval through our Engineering dept. What they do is send in a gerber layer from the stencil house and lays it over the current solder paste layer and ve
Electronics Forum | Fri May 30 17:20:53 EDT 2003 | jonfox
Is this setup charge the cost of purchasing the required materials? I left that out of my previous post. As far as manufacturing cost, usually they add up the cost of machine time (leased or owned), operator time (wage based), and the size of the o
Electronics Forum | Tue Jul 02 15:50:28 EDT 2002 | blnorman
FIrst, be a doubting Thomas and never trust supplier propaganda sheets, do your own testing. How often do you knead the paste? We have a standing requirement that if the paste printer is idle for 30 minutes, we have a minimum of 4 kneads before pri
.gif)
