Electronics Forum | Tue Oct 03 17:08:31 EDT 2023 | assuredtech
What Is FR4 Substrate Material? FR4, also written as FR-4, is both a name and a standard rating. The name is applied to the fiberglass-reinforced epoxy-laminated sheets used in printed circuit board manufacturing. However, the name also functions as
Electronics Forum | Wed May 13 07:24:12 EDT 1998 | Sherry
Does the temp. profiles used to reflow double sided pcb's through a IR oven on FR4 board material have to be re-established if it is changed to polyimide? Boards will be baked out prior to assembly. any response would be most appreciated.
Electronics Forum | Thu May 14 04:11:33 EDT 1998 | JACK CHEN
| Does the temp. profiles used to reflow double sided pcb's through a IR oven | on FR4 board material have to be re-established if it is changed to | polyimide? Boards will be baked out prior to assembly. | any response would be most appreciated.
Electronics Forum | Tue May 05 17:01:25 EDT 1998 | bob
I hear that there is a problem with using ceramic parts that are sizeable. Apparently, there is a mismatch in the Temperature Coefficient of Expansion between the FR4 and ceramic materials which causes the soldered erminations to weaken and eventuall
Electronics Forum | Sun Apr 25 08:46:57 EDT 2004 | Roni H.
Hello, Does anyone heard of "F2" or "GV" as replacement materials for FR4?? I'll be glad to have any information regarding this issue. Thanks Roni H.
Electronics Forum | Mon Mar 07 15:35:35 EST 2005 | John M
It has been my experience that the standard Fr4 material (Tg 135c) will discolor when processed at the new higher temperatures required for the high tin alloys... We have been using the High Tg Fr4 (Tg 170c) for many years to ensure this does not hap
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 | 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 | Sat Nov 03 05:41:07 EST 2001 | Ben
Hi Could somesomeone help to let me know can bare PCB (FR4) is damaged by thermal shock? Can difference of CTE from copper or solder to FR4 damage PCB from apply heat too fast? Any specification or standard can i refer? Thank you Ben
Electronics Forum | Tue Aug 22 13:04:04 EDT 2000 | Eugene Smelik
Dr. Lee, Given the higher reflow temperatures for Pb-Free assembly, will common FR4 laminate materials be adequate, or do you believe that higher glass content boards will be required for mainstream Pb-free assembly? As a corollary question - if man
