Electronics Forum | Sat May 16 19:31:27 EDT 1998 | Graham Naisbitt
Gentlemen, Please consider that ionic testing is designed only for detecting ionic contaminants. Yes there are instances of non-ionic contaminants that cause premature circuit failure. However, more importantly the prevailing specs are less than adeq
Electronics Forum | Mon Mar 02 00:38:35 EST 2009 | sachu_70
Hi Jorge, The success of such production purely depends on process control. One needs to first understand the board layout in detail, and evaluate any critical components for their temperature handling capabilities. Remember, you are dealing with com
Electronics Forum | Mon Feb 20 15:03:56 EST 2006 | davef
Q1- Will we be able to select the materials (flux and alloy) and run the process depending only on ourselves, distributors� help, machinery documentation, web data and �trial and error?� A1- Your materials suppliers [eg Kester, Alpha Metals, etc] wil
Electronics Forum | Tue Aug 01 09:42:07 EDT 2000 | Gary
The Technical Services Group at Alpha Metals has spent a fair amount of time looking at wave soldered Pb-free connections. We too have observed fillet tearing, fillet lifting, and pad lifting. I have concluded that without major changes in the mate
Electronics Forum | Wed Jul 28 12:02:48 EDT 1999 | Wolfgang Busko
| | While inspecting incoming PCBs we detected around all plated-through-holes (only there and all in the same place) some halfmoonshaped light rings that match obviously only with the pink ring symptom shown in the IPC-A-600 chapter 2.5.2.. That wou
Electronics Forum | Mon Oct 21 22:15:36 EDT 2002 | davef
First, SIR data is heavily dependant on the test pattern selected. Be very careful when comparing the results of resistance readings taken from different geometric patterns. Second, if yer talkin': * Bare boards, yupper. * Finished assemblies impor
Electronics Forum | Thu Jul 01 13:47:25 EDT 2004 | Tom B
Good Day! I am looking to purchase a Cyberoptics KS-Flex 18 AOI system, I have a couple of question that if you could answer, I would most appreciative. 1) Model and length of time used. Do they use AOI for all pwbs or just the more complex a
Electronics Forum | Fri Apr 27 12:08:43 EDT 2007 | Machine Designer
In the infamous words of one of my good customers. "Vision systems suck, it's just that some suck less than others" and he would know having hand built AOI systems internally for over 10 years. Do you have any idea how many people think one-off mac
Electronics Forum | Wed Aug 11 18:36:03 EDT 2004 | davef
90 Knoop. Q2: Thickness is 4 to 10 u" for Au and 300 to 400 u" for nickel A2: This looks like a ENIG spec. Although, the Ni is quite heavy, 150 uin is sufficient for most applications. [IPC-4552 ENIG specification: * Gold thickness of 0.075 - 0.125
Electronics Forum | Thu Feb 03 11:20:15 EST 2000 | John O'Brien
This is getting to be a more common practice, especially with the application of a 2-D bar code directly to the board (via laser, ink jet,etc.) Some really major companies are jumping on the bandwagon because it also allows treating each board as a l
