Electronics Forum: fr4 and burning (Page 1 of 6)

PDBE and PBB replacements???

Electronics Forum | Mon Apr 25 22:56:44 EDT 2005 | davef

rush316 First, no one stated that PBB and/or PCBE are in FR4. FR4 contain tetra-bromo-bisphenol A [TBBA]. Second, there are classes [and grades] of dielectric materials used in fabricating printed circuit boards. Grades, NEMA LI-1. From these gr

PDBE and PBB replacements???

Electronics Forum | Mon Apr 25 17:07:11 EDT 2005 | rush316

You indicate that PBBs and PBDEs are included in FR4 materials!! Does this include PCB (Printed Circuit Boards)??

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

Flexi boards and uBGA

Electronics Forum | Tue Jul 11 10:13:22 EDT 2006 | SWAG

Over time, you might see problems with delam., blistering and warpage if using FR4 carriers. Depending on volumes, you might consider using durostone or some robust material like that for the production runs. Keep in mind that switching materials w

PCB material Nelco13 and FR4

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

Thanks a lot !

Printed Circuit Boards

Electronics Forum | Mon Oct 02 14:59:29 EDT 2006 | jbecircuits

Ooops sorry! Has anyone ever had a problem with using FR4 for a burn-in board? We suggested using Nelco or getek, but will FR4 have any problems in the assembly area through the solder wave?

PDBE and PBB replacements???

Electronics Forum | Fri Mar 11 18:47:54 EST 2005 | davef

JD: It's important to note that FR-4 does not contain PBB or PBDE. The bromine in FR-4 epoxy comes in the form of tetra-bromo-bisphenol A [TBBA], which polymerizes and become part of the cross-linked epoxy. Bromine, in the form of hydrogen bromide, i

Re: Paste-in_hole and CTE

Electronics Forum | Fri Jul 28 14:34:13 EDT 2000 | Gary Simbulan

Belive it or not, these boards were run through a Centech batch mode Vapor Phase machine. Single stage top side IR preheat. Vapor temp 218 C. Solder paste is an SN62 RMA.The boards were FR4 8 layer w/ solder mask, fairly conventional as might be e

Solder Balls and Humidity

Electronics Forum | Tue Aug 28 11:12:23 EDT 2007 | grics

This is what I was thinking, but I am being beat up pretty badly by the selective solder. Ambient temperature is anywhere in the the neighborhood of 76 - 80 degrees F. I am not sure of the RH, but I wouldn't think that would be my issue... One of

WSOL and solder pot

Electronics Forum | Fri Mar 14 11:18:29 EDT 2008 | operator

The way it works is the liquid solder immediatley cures (or should I say burns) the WSOL where ever it touches it. This hardens and keeps it in place and protects whatever is under it. Some of the WSOL falls of in the pot. I am suprised that the burn

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