Electronics Forum: spi and defect (Page 1 of 19)

Nitrogen gas and Tombstone defect

Electronics Forum | Mon Nov 21 10:12:11 EST 2011 | callckq

All, I try to find explanation(Article)on how Nitrogen gas can make tombstone defect even worst. However, I can't find one in the net. Anyone that has this information or article, appreciate if you can share with me...Thanks in advance.

Nitrogen gas and Tombstone defect

Electronics Forum | Mon Nov 21 16:34:03 EST 2011 | davef

Google: nitrogen reflow tombstone https://www.google.com/search?q=nitrogen+reflow+tombstone&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Nitrogen gas and Tombstone defect

Electronics Forum | Thu Nov 24 07:41:33 EST 2011 | davef

Here's a paper from the SMTnet Newsletter http://www.smtnet.com/library/files/upload/dispelling_10_myths_about_nitrogen_reflow__andy_mackie.pdf

Nitrogen gas and Tombstone defect

Electronics Forum | Tue Nov 29 14:57:45 EST 2011 | jlawson

Sorry on N2 and tombstone, many other aspects cause tombstones and n2 in itself does not cause tombstones. It can help make other bad variables tip over edge to cause tombstones more than with no N2. Get these right then N2 is not issue.

Nitrogen gas and Tombstone defect

Electronics Forum | Tue Nov 29 14:55:17 EST 2011 | jlawson

N2 is a reflow process widener so to speak, for leaded reflow less of a impact, for LF more impact, and if using finer LF solder pastes T4,T5 and smaller paste deposits generally, it helps widen window for flux in paste in oxide protection during soa

Nitrogen gas and Tombstone defect

Electronics Forum | Mon Nov 21 10:51:12 EST 2011 | scottp

I've never seen a good article with a definitive explanation - just speculation that the increased wetting forces due to nitrogen result in increased tombstones. My own experience is that nitrogen is a very minor contributor to tombstones and can pr

High-end SPI and AOI?

Electronics Forum | Wed Oct 14 08:39:01 EDT 2009 | edmaya33

Anybody here work with Viscom S3088-II QS SPI? I heard this machine offers an ultra high speed of inspection and a state of the art features. We have been working with Orbotech P36+ but all we got is headache. A 2K US$ illumination board always fai

High-end SPI and AOI?

Electronics Forum | Tue Jan 12 21:24:13 EST 2010 | graceytiu07

We have a Viscom SPI S3054QS. Yup, the machine offers a quite good speed. My board dimension is 150 by 250mm. The cycle time is only about 24 sec. The analyze time is only about 10sec. You can make your loading faster, if that's what you needed. I ha

High-end SPI and AOI?

Electronics Forum | Tue Jan 12 15:54:09 EST 2010 | chupitoone

Hi, Orbotech actually sold it's division to ORPRO Vision. They development of the equipment is still progressing in both their Reflow inspection and SPI systems. Both have newer versions of software released and at the show in SanDiego they demonstr

High-end SPI and AOI?

Electronics Forum | Tue Oct 13 22:56:22 EDT 2009 | cpcompany

Can anyone help me recommend or simulate a SPI > and AOI machine that can balance our FUJI NXT 1 > with 14 modules. We are using MPM accela printer. > 200 UPH is our target. > > Here's the PCB > dimension > > length(x) = 399.92mm width(y) = >

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