Electronics Forum | Wed Jun 07 22:33:50 EDT 2006 | Bolos
first: what is your problem after reflow? second: a good rule of thumb is a tolerance of 1 mil. for example..if you got 5 thou stencil thickness then your range of thickness is 6-/+1 thou.. then you just improve after you get your height data and ana
Electronics Forum | Fri Oct 03 07:49:18 EDT 2003 | mk
Mask Musings. Soldermask (SM) and its functions have changed and evolved over the years. As an ex-solder mask applicator, I can remember screening Colonial High Gloss Epoxy soldermask on boards back in the early 80's, ending up with a thickness that
Electronics Forum | Mon Apr 23 14:59:56 EDT 2001 | relensky
I have been using pallet from Integrated Ideas and Technologies (www.integratedideas.com). They offer a "laminated" pallet that can have the various layers cut in several thicknesses. They are very helpful and willing to solve problems. The best p
Electronics Forum | Mon May 07 16:07:05 EDT 2012 | davef
Start with targets based on the stencil thickness (for height) and stencil thickness times the aperture size (for volume). * Set reasonable upper and lower control limits (+ 25% and –25 % of the targets, for example). * Next, check the printer set-u
Electronics Forum | Mon May 07 10:42:09 EDT 2012 | saju86ece
Hi, I need one clarification about solder paste printing height tolerance. How to define and fix the solder paste height tolerance after screen printing for inspection purpose. Currently we are using 5mils thickness of stencil, in that we are gave
Electronics Forum | Thu Sep 20 10:05:35 EDT 2012 | guyramsey
What is the state of the art in electroplated gold flash a a surface finish; thickness and tolerance limits?
Electronics Forum | Tue Jun 01 05:17:16 EDT 2004 | Alistair MacAdam
I am currently looking at the volume of paste being deposited on a PWB 2.4mm thick with a 0.25mm tolerance. I am looking for information on PWB variation and a MPM AP25 series printer, and can the volume of paste be controlled on varing PWB thickness
Electronics Forum | Tue Jan 20 10:30:56 EST 2009 | milas
Hi We have just specified the following thicknesses for the Nickel and Gold on an ENIG finish board. The baord is to be manufactured using a lead - free process. My question: Is the thickness we've specificed likely to gie us any issues during manuf
Electronics Forum | Sun Feb 15 21:28:44 EST 2004 | Annoymous
Gridlok is good but it will also depends on your board. Board that is warpped and thick will not be flatten by gridlok as the concept for this support system is to conform to the shape of the underside of the board with very minimum upward force from
Electronics Forum | Mon Jan 29 17:45:35 EST 2001 | clem
The general guideline for most PCB manufacturers for PCB thickness tolerance is +/- 10%. Is this documented in an IPC spec? If so which one? Thanks Dave
