Electronics Forum: pcb and material (Page 1 of 141)

PCB material Nelco13 and FR4

Electronics Forum | Thu Jun 24 23:57:42 EDT 2004 | George

Could anyone tell me the difference in PCB material Nelco13 and FR4? PCB dielectric material Nelco13 is quite new for me and I knew nothing about it. For imcoming quality control (IQC), I am asked to identify PCB made of FR4 and Nelco13. How to do th

PCB material Nelco13 and FR4

Electronics Forum | Mon Jun 28 01:44:02 EDT 2004 | George

Thanks a lot !

PCB material Nelco13 and FR4

Electronics Forum | Fri Jun 25 07:13:40 EDT 2004 | davef

Nelco was developed by Park [ http://www.parknelco.com/parknelco/highspeed.htm ] Without fairly involved testing, you may be forced to rely on a c of c from your fabricator. Although, Park may be able to give you a lead.

force between the pad and laminate material

Electronics Forum | Thu Jun 20 04:49:34 EDT 2002 | scottxiao

according to the ressult of cross-section and removing the component, I find there is no black area in the left pad, and the IMC is also normal, so the black nickle is less impossible. the PCB material is not common FR4, just some thing like ceramic,

force between the pad and laminate material

Electronics Forum | Tue Jun 11 22:06:06 EDT 2002 | scottxiao

I encounter the problem, it is easy for pad(copper) to drop off from the PCB, which is Ni/Au finish. so my question is whether there is any specification about the force between pad and laminate material, and does the PCB corpoartion test this parame

Desiccants and pcb finish degradation?

Electronics Forum | Tue May 22 08:43:05 EDT 2001 | ohboy

Wow! I'm going to apply for something at Desiccare, I think... I found similar things about desiccants, but mostly material related stuff, also some concerns more about the indicator card than the desiccant. Nothing conclusive. At the moment, I

PCB material

Electronics Forum | Mon Dec 13 07:34:10 EST 2010 | davef

Here's a link to a recent thread on warpage http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=63244

Desiccants and pcb finish degradation?

Electronics Forum | Wed May 16 08:48:12 EDT 2001 | ohboy

I been a bunch o' places...! Some good, some bad, re-inventing the wheel in many cases. Our specs are pretty specific in a lot of cases, but that doesn't mean they always get followed. It usually becomes a case of "It's not quite right, but we rea

Desiccants and pcb finish degradation?

Electronics Forum | Mon May 21 17:32:23 EDT 2001 | davef

I said: "Our electronic circuit board fabricators seal the boards in moisture barrier bags [MBB]. We discontinued the use of desiccant bags in these MBB because of concerns about the desiccant releasing materials that would affect the solderability

PCB material

Electronics Forum | Fri Dec 10 01:02:36 EST 2010 | sparrow

Hello, our products are made on single-sided boards and we often have problems with receiving too warped PCBs from our suppliers. Can anybody suggest a good laminate or the most important properties of the material so we could specify it when we orde

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