Electronics Forum | Wed Sep 11 07:37:11 EDT 2002 | mk
Whoaaaa Genny, Its not that bad!!! The difficulty factor is in assembling your own boards is all releative to how many, and how difficult they are. Most studies show that the vast majority of defects in smd assembly are generated in the application
Electronics Forum | Fri Oct 25 12:23:49 EDT 2002 | yngwie
Hi Experts, I'm facing short problem with BGA at SRT rework in one particular BGA. It is BGA, with a metal piece at the center like a coin. The BGA is located in between two high profile press fit connectors and the short always observed at the si
Electronics Forum | Mon Mar 03 09:57:26 EST 2003 | msivigny
Hello markt, If you're only running at 85%, you've got some things to look into! First, it's good you know that you're operating at 85% with some measurables that help you determine that. Now, the easiest methodical way to improve productivity on SMT
Electronics Forum | Tue Mar 04 15:54:20 EST 2003 | msivigny
You're welcome John, it can get confusing but what's important is that machine's exhibit accuracy AND repeatability. Generally, high Cp values represent high repeatability (for instance in darts: hitting a triple 20 over and over means you're very re
Electronics Forum | Thu Mar 06 18:48:34 EST 2003 | msivigny
Hello George, SPC can be time consuming but if you don't track or make recordings consistently then how do you measure your process performance and overall line quality?I'm sure your customer is asking because they want you to demonstrate that your p
Electronics Forum | Fri Mar 28 00:56:50 EST 2003 | iman
we have a issue of post-reflow oven (SMT) soldering defects of blowholes and pinholes. Any suggestions or knowledge on root cause is appreciated to be share? BACKGROUND : we DI water wash and oven bake the PCB bareboards at 90deg-C for 60mins, to r
Electronics Forum | Thu Apr 03 09:08:50 EST 2003 | rdr
Thanks Scott,Iman, The problem has been isolated to detachment from package so I believe that there are no fabrication issues related to the Gold on the PCB. What is a Moyet analisys? where can I find more info? Dave, I am still waiting on Altera t
Electronics Forum | Thu May 08 11:58:12 EDT 2003 | fmonette
Hi Chrissie, This might be old news to you but I just wanted to make sure that you are aware of all the implications of BGA rework relative to the control of moisture-sensitive components. For example, you need to keep track of the total exposure t
Electronics Forum | Wed Jun 11 16:30:33 EDT 2003 | T.Vick
You have received some great feedback so far. I would like to summarize and add a few points regarding maintenance. You should start (as recommended already) by verifying your component library data. Using the default values from the master library i
Electronics Forum | Mon Nov 17 17:26:40 EST 2003 | severs
Not too sure about that compressed air idea.... How dry is the air? Will it be monitored for moisture content? Given that the air IS dry enough (less than 5% RH) You will have to supply compressed air 24hrs per day, without any disruption in flow
