Electronics Forum: fr-2 (Page 1 of 2)

FR-2 against CEM-1

Electronics Forum | Mon Sep 25 07:35:04 EDT 2000 | Mikel Rodriguez

Hello, We are using FR-2 in boards 15x10cm size, with SMD and thru hole components (about 100 SMD and 50 thru hole). We have some "rare" problems (flex cracks or caps, diodes, and so on). Would we improve something by using CEM-1 instead of FR-2?? Mo

Reflow FR2

Electronics Forum | Tue Jul 13 03:30:46 EDT 1999 | George

Our plant in Slowakia tries to convince me that it is not possible to reflow FR2 PCB-material. At this moment the PCB's leave the reflow dark coloured and they are schrinked. I'm still waiting for a reflow profile, because I can't believe that it is

Re: Reflow FR2

Electronics Forum | Wed Jul 14 09:33:18 EDT 1999 | Dave F

Our plant in Slowakia tries to convince me that it is not possible to reflow FR2 PCB-material. At this moment the PCB's leave the reflow dark coloured and they are schrinked. I'm still waiting for a reflow profile, because I can't believe th

materials in pcb

Electronics Forum | Fri Aug 18 03:34:20 EDT 2006 | ridzal

i want to know about some basic details of materials in pcb such as CEM, FR1, FR2, FR3 and XPC.The use, advantages and also disadvantages

cem3

Electronics Forum | Fri Oct 05 09:15:23 EDT 2001 | Ben Bierlein

It is a PCB material that has a woven glass / epoxy internal core and glass veil surface. It is in between the paper materials (FR1,FR2 and CEM1) and FR-4 as far as strength and cost. It is available in HiCTI material for high power applications.

Un-reworkable Glue type

Electronics Forum | Tue Aug 23 06:59:26 EDT 2011 | headlad

We use a 2 part epoxy from DEVCON it's listed as 5 minute FR 2 part epoxy. We have used a lot of the material with excellent results, specifically for security reasons.

material of laminates of printed circuit board

Electronics Forum | Thu Feb 03 06:21:57 EST 2000 | Ignacio Simon

I would like to have information about the materials commonly used for laminates of printed circuit boards, their main thermal, mechanical, humidity and electrical characteristics and proper finishing and aplicattions, and advantages/disadvantages be

lead free wave soldering parameters

Electronics Forum | Thu May 11 18:59:40 EDT 2000 | lboone

Have anyone perform wave soldering on FR-2 and FR-1 printed circuit board with lead free soldering? Can you share the parameters(wave temperature,preheat temperature, contact time, wave height,etc,) used and did you do any changes to the wave solderi

Re: PCB Material

Electronics Forum | Wed Sep 13 20:58:50 EDT 2000 | Dave F

If you don't know what you have, how the blank are we sposed to tell you? Try your local fab. CEM1 - Opaque tan CEM3 - Translucent FR2 - Opaque brown FR3 - Opaque cream FR4 - Translucent FR5 - Translucent FR6 - Opaque white G10 - Translucent G11 -

Re: FR-2 against CEM-1

Electronics Forum | Tue Sep 26 20:12:06 EDT 2000 | Dave F

I assume your "mounting manufacturer" (whatever that is) would reduce your cost. That would be cool, eh? There are some electrical, moisture absorbtion, flammability classification, and operating temperature considerations that your mounting manuf

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