Electronics Forum: circuit boards (Page 1 of 123)

Printed circuit boards materials

Electronics Forum | Mon Apr 12 11:32:47 EDT 2004 | Luis Lazcano

Can you share some information on the hazardous materials and cleaning details for your manufacturing processes, please ? These are the questions I need to ask you: 1. Do you use brominated fire retardant in PWB material? If not, what other type

Printed circuit boards materials

Electronics Forum | Mon Apr 12 22:50:46 EDT 2004 | davef

For more information on flame retardents, try these sites: * http://www.bsef.com * http://www.firesafety.org For the summary of a study into flame retardants try: http://www.surrey.ac.uk/PRC/ IVF carried out an international study on alternati

ribbon cable circuit boards depanalization

Electronics Forum | Thu Jan 03 15:20:02 EST 2002 | Luis F. Otero

What method of depanelization is used to depanelize circuit boards made of flexable ribbon cable material.Any input welcomed. Luis F. Otero (915)-780-5504

Moisture absorbtion in circuit boards

Electronics Forum | Mon May 27 18:59:24 EDT 2002 | Armynski

Carol, That time is also acceptable (2 Hrs @ 125 deg C) u can use this too... 6 Hrs @ 75 deg. C regards, Dreamy

ribbon cable circuit boards depanalization

Electronics Forum | Thu Jan 03 22:39:37 EST 2002 | davef

For us, it depends on product volume: * Low volume: Tailor's scissors sharpened for the job. * Mid volume: Custom die used in a press. * High volume: We don't do this, but we'd have buy a singulation machine, er something like that. [Search the SMTne

Moisture absorbtion in circuit boards

Electronics Forum | Mon May 27 18:25:03 EDT 2002 | Carol Stirling

Thanks for the information Reworkman, We are leaning to the theory of better safe than sorry. I think I'd supply the bags and dessicant just to eliminate manufacturing issues. What temps & times do you ask your boardhouse to bake to? Ours said some

Moisture absorbtion in circuit boards

Electronics Forum | Tue May 21 17:25:28 EDT 2002 | Carol Stirling

Hi Dave F, Thanks for the reply, the question was Customer driven. Could you clarify your recommendations for heat sealed moisture barrier bags please - does this include Nitrogen vac pack? Our production runs are small, so there is an investigat

Moisture absorbtion in circuit boards

Electronics Forum | Wed May 08 11:07:54 EDT 2002 | Carol Stirling

We have a concern with moisture absorbtion/humidity effects on PWBs specifically used for automated SMT (including BGA). I'm sure there is a IPC spec on this and would appreciate the number - I've searched the IPC web-site -no results. Could you t

Moisture absorbtion in circuit boards

Electronics Forum | Tue May 28 22:06:09 EDT 2002 | arcandspark

Two hours at 125 C will do nothing. IPC's new spec is 48 hours at 125C, the old spec I use to use for years was 24 hours at 125C. I do not have all the spec in front of me but if you reduce the temp to around 60C it can take up to 48 days. We use to

Moisture absorbtion in circuit boards

Electronics Forum | Tue May 28 22:06:18 EDT 2002 | arcandspark

Two hours at 125 C will do nothing. IPC's new spec is 48 hours at 125C, the old spec I use to use for years was 24 hours at 125C. I do not have all the spec in front of me but if you reduce the temp to around 60C it can take up to 48 days. We use to

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