Electronics Forum | Tue Feb 21 21:17:41 EST 2006 | Cal Kolokoy
M, The paste height is what you establish it as. You're probably using a laser measurement system, and these depend on where your reference datum is. Some will measure from a silkscreen, a trace, or solder mask. These add height, not to mention H
Electronics Forum | Fri Feb 09 20:05:15 EST 2001 | benefid
The ENIG process will yield between 3-7 micro inches (110 - 275 microns) of gold over the nickel barrier. This thickness range is pretty much the limit as this is a self limiting displacement reaction process. Once all surface nickel ions are repl
Electronics Forum | Thu May 22 16:52:39 EDT 2008 | tonyamenson
Indium got back to me with the attached PDF. I always assumed, that in order to avoid thermal shock, there could not be any more than 80 degrees C difference between the solder pot and the pre-heated board. However, it would seem that any thing le
Electronics Forum | Sat Nov 14 08:05:54 EST 1998 | Earl Moon
| | | | I believe that gold fingers on my circuit boards are being | | | | contaminated and need to clean them with some chemical | | | | solution. Any recommendations. | | | | | | | Chuck: What is the type and source of your contamination? Dave
Electronics Forum | Fri Jan 26 08:28:59 EST 2001 | Sal
I am currently in the Process of setting up some SPC software on our Wavesoldering equipment. What I would like to know for each Parameter that is listed below what kind of variation from my average setpoint would cause defects.Example. If the averag
Electronics Forum | Fri Jan 21 18:47:14 EST 2000 | Ashok Dhawan
This massage is for clarifications on storage and handling of Moisture sensitive parts: Does chip resistors,capacitors and inductors need vacuum packing during usage life? For repacking of FPDs to limit reuse, is it necessary to use vacuum seler or s
Electronics Forum | Mon Nov 08 15:10:56 EST 1999 | John Thorup
Well Keith, I certainly overestimated this community's desire to voice its feelings about the recent departures and the general state of SMTnet over the last several weeks. I suppose it is for the best that we just get on with it. Like most busy pr
Electronics Forum | Mon Jul 12 13:06:32 EDT 1999 | Earl Moon
| I had parts replaced on SMT PWBs and the repair created measling defects. | Reliability Question: | Q1. Can measling be aggrevated or grow over time due to | temperature cycling and moisture. Customer environment is | -62C to +85C. | | Thank
Electronics Forum | Thu Feb 05 15:12:58 EST 2004 | pjc
There is the IPC/JEDEC J-STD-033 that addresses moisture sensitive components. Go to http://www.ipc.org for the standard. Your factory/storage area environment will dictate exposure times allowable. Be mindful of temperature and humidity changes- lik
Electronics Forum | Tue Jun 15 17:00:27 EDT 2004 | Rob
I'll jump on this bandwagon too... A crude method was buying a bread rack and widening it to the width of a fixed stencil. Since we get our foils from A-Laser, we get these card board squares. I would tape three of these pieces together to make a som
