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TO: I1263600 IBMMAIL ipc internet technical query
FROM: DSTEWART EX2 D.Stewart - Product Development Manager.
DATE: 10 August 1995
SUBJECT: laminate with CTI of 400+
REFERENCE: what to use?
We have a customer who has been asked by his designers to provide
boards with a CTI of greater than 400 and a flammability rating of
94V-1. They also ask if standard FR4 will comply - at least I know
the answer to that one.
I am not sure what laminate will meet this requirement - FR3 has
been suggested, but laminate suppliers always leave off the CTI
when quoting electrical properties.
Could someone help identify something to suit?
On another issue, I always get confused when people talk about FR3,
G10, G200, CEM 1, CEM3 etc. I know what FR4 is - glass fibre
reinforced epoxy laminate - but could someone put the other
materials into similar English for me?
Dougal Stewart
Product Development Manager
Exacta Circuits
Scotland
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