Hi Jim,
The FR is for Fire Retardant. I'm not sure how the 4 came about, but I
believe it had something to do with the construction. The non- fire retardant
version was known as G-10.
Regards,
Les
> From: Jim Marsico 516-595-5879 <[log in to unmask]>, on 3/29/99 1:56 PM:
> Can anyone tell me what the F,R and 4 means for FR-4 material?
>
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