To knowers of RF-materials.
"Is it acceptable with discoloration of TMM after 1h in +150Celcius? The
TMM has a thick brass backside. TMM is inert to most normal solvents and
etchants and Tg is more than 400Celcius. After 1h it has changed from
Tefon-grey to Budweisser yellow. Someone who is familiar with this?"
Ingemar Hernefjord
Ericsson Microwave Systems
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