Electronics Forum: 500 ppm (Page 3 of 5)

QFN's and LGA's

Electronics Forum | Tue May 12 10:03:12 EDT 2009 | daan_terstegge

Hi All, I see more and more components like QFN or LGA with bottom-only terminations,with landpatterns getting finer all the time. I have no ppm-figures of our process, but based on a benchmark study by Agilent I'd say that 500 ppm is a decent value

Replacement for nitrogen in the reflow oven

Electronics Forum | Mon May 24 06:00:23 EDT 2004 | johnwnz

call me picky but doesn't hydrogen combust? maybe soemthing you could do is look at your process and your products and decide if you actually need to run in N2. Yes ok I can hear the crys now but seriously, for the vast majority of things if you have

how to achieve 500ppm?

Electronics Forum | Wed Jun 15 00:50:32 EDT 2005 | Frank

From my understanding: Sigma is the same as one standard deviation. So 3 sigma is the same as 3 standard deviations. It all boils down to how repeatable your machine is. Another way to look at it is the probability (or confidence) that the machin

Re: SMT Zero-defect Soldering

Electronics Forum | Wed Dec 08 18:11:22 EST 1999 | Dave F

sin: You're correct, there is no defect reduction program that's perfect, in fact nothing is perfect!!!! That's why people talk about 6 sigma and not 20 sigma!!!! If you had a perfectly controlled process, you'd still have defects due to random va

Open v.s viscosity

Electronics Forum | Tue Apr 18 08:05:00 EDT 2000 | Wister

Hi, I got an interesting result after completing DOE that more open defects occurred higher the viscosity.The ppm would be 500 while the viscosity is 950 and it would be 1500 while the viscosity is 1050.The range of viscosity is 900 ~ 1100kcps. The p

Re: N2 Reduction

Electronics Forum | Wed Dec 30 17:20:40 EST 1998 | Marc P.

| Does anyone have angles on how to reduce N2 consumption at reflow process (i.e. process control equipment, etc.)? | | Any help would be appreciated | There are a number of ways to reduce consumption: 1)One way to look at consumption is to view i

Re: How to measure N2 in reflow oven

Electronics Forum | Tue Mar 09 07:06:42 EST 1999 | Charles Stringer

| | | | I need to setup an oven to run with a nitrogen atmosphere for | | boards with BGA's, but our ovens do not have the optional atmosphere monitor and controller. Is there a good way to sample and control the atmosphere without the optional bui

Re: Printed Circuit Board Material

Electronics Forum | Wed Oct 18 16:41:35 EDT 2000 | Dave F

It's unrealistic to think that two materials with the following disperant properties would have the same reflow profile. From http://www.norplex.com/Carrier.htm Physical Properties / NEMA FR-4 / NEMA CEM-1 Glass transition temperature �C / 130 / 10

Question on Nitrogen Consumption during Reflow

Electronics Forum | Tue Jun 26 19:50:00 EDT 2001 | davef

49 hits on nitrogen, you probably used the one with the entry window => 13 or whatever hits on nitrogen. Here is my take on what you missed by using the other seach: Date: May 26, 2001 04:57 AM Author: Brian Sloth Bentzen Subject: Nitrogen Reflow

Batch Cleaner Closed Loop YES!!! / NO!!! / MAYBE???

Electronics Forum | Fri Feb 15 13:24:44 EST 2002 | Mike Konrad

Hi Dave, To close-loop or not to close-loop, that is the question� I can not speak for all machines, but in our case, close-loop systems are actually less costly to operate than open-loop systems (we make both). First, determine the volume of wate


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