Electronics Forum | Sat Dec 24 07:48:52 EST 2005 | ams_gen
Hello, I need to rework a thru hole DIP mounted on a metal backed FR4. It is difficult to remove the FR4 board from the metal back since it is riveted. Is there a simpler way to takle this? Thnx
Electronics Forum | Fri Aug 25 09:25:41 EDT 2006 | YQ Deng
For FR4 ENIG PCB: 1. In a normal condition, what is the broken location after BGA peeled off?(FR4 layer or Ni layer or solder ball) 2. What is the soldering acceptance criteria for BGA in CMK?
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?
Electronics Forum | Tue May 25 13:30:38 EDT 2010 | nikopolidis
HI Please Advice witch material can stand more heat FR4 or CEM3. PCB assembly will be used under the body of toaster Temp. range 90°C Could anyone tell me the difference in PCB material For imcoming quality control. Thanks & regards Fotis
Electronics Forum | Mon May 13 03:06:12 EDT 2019 | peterchan
pcb/led/fpc/ccl/xpc/fr4/xpc board cutting machine if you interested in,please contact us email:s1@hk-yush.com
Electronics Forum | Tue Jun 28 20:38:58 EDT 2022 | smith88
I have a question on NEMA Grade FR-4 mechanical stiffeners, Understand that they do not required to be void free and are common, but is there any concern I should have of potential in the field use problems from them?
Electronics Forum | Thu Jun 25 11:47:39 EDT 1998 | Steve A
| Hi there, | Does any one know what is TCE for fully wet saturated FR4. I came to know that for Dry FR4 the TCE is about 15-19 PPM �C. Is that true? | | Appreciated for your help. | rgs, | chiakl Chiakl, It looks like you are speaking of what could
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
Electronics Forum | Mon Nov 20 04:39:19 EST 2000 | SV
Hello, I have to design a PCB for which the customer have the following temperature requirements: -55degC to +85degC operating temp. -61degC to +125degC storage temp. My question is: does the FR4 material meet this conditions? Which are the parame
Electronics Forum | Mon Oct 02 21:36:03 EDT 2006 | davef
All of us wave solder FR4 all day-long, not to say we have never had problems doing it. The selection of the laminate material should depend on the burnin application. We'd be concerned about a FR4 burnin board that saw GT 150*C for extended period
