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The Use of PTFE Base Materials
PTFE/woven glass base materials are not surrounded by the myth of something exotic anymore. A secured manufacturing
and defined processing to pcbs are the guarantors for it. Rapid growth of applications operating at high frequencies
demands a material availability with proven performance over many years. These facts are both given with PTFE/woven
glass base materials. Typical advantages of woven glass fabric reinforced PTFE base materials over materials made
from thermoset resins other than FR4 are the higher interlaminar bond strength and therefore also copper peel strength.
The peel strength issue is not as critical at the stage of pcb manufacture than during rework of the assemblies,
when conductors are partially exposed to very high temperatures.
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