Electronics Forum: pcb cem-3 versus fr-4 (Page 1 of 2)

FR4 or CEM3

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

FR4 or CEM3

Electronics Forum | Wed Jun 23 07:24:55 EDT 2010 | szpcbpartner

welcome to PCB Partner, there are more than 2300 PCB suppliers here. http://www.pcbpartner.com

Non-halogenated PCB

Electronics Forum | Wed Jul 19 11:06:42 EDT 2000 | polymer

Where can I find laminates containing non-halogenated PCB? I'm especially interested in FR-4 and CEM-3, 1.6 mm 25um. Thanks in advance! Dr. Lennart Johansson Polymer Support

FR4 or CEM3

Electronics Forum | Fri Jun 04 01:38:09 EDT 2010 | nikopolidis

Thanks My mistake on the previous post is that the Temperature will be way beyond 90C maybe reach to 400c as the PCB will be placed under the Heating plate of the sandwich maker! So my concern is the heating tolerance! Appreciated your knowledge b

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.

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: PCB panelization method

Electronics Forum | Tue Nov 16 09:44:18 EST 1999 | - bobar

Ken, The technology you are referring to is also known as return-to-web. This panelization method involves a hard tooled perimeter die and a press equipped with an air cushion. The PCB circuit is punched out and then inserted or "pushed" back into

Rephrase : mixed technology criteria.

Electronics Forum | Sat Oct 09 09:50:04 EDT 1999 | Ken Fong

Hi, We are using mixed technology in our PCBA. Would like to know whether there is any criteria governing/guiding the use of mixed technology in such aspects as: 1. Some SMDs cannot be used in some kind of PCB materials such as FR1? 2. Some SMDs are

Re: Rephrase : mixed technology criteria.

Electronics Forum | Mon Oct 11 13:44:29 EDT 1999 | Dave F

Ken: Since Earl is no longer here, I guess I'll bite on this. Your questions are very broad and difficult to answer specifically. So, I'll give you broad and non-specific answers. | Hi, | | We are using mixed technology in our PCBA. Would like to

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Thu Sep 09 09:13:10 EDT 1999 | Scott Cook

| hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the precis

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