Definition

Rogers TMM (Thermoset Microwave Material) series are ceramic-filled hydrocarbon thermosets offering a range of Dk values without PTFE processing requirements. TMM3: Dk 3.27, Df 0.0020. TMM4: Dk 4.50, Df 0.0020. TMM6: Dk 6.00, Df 0.0023. TMM10: Dk 9.20, Df 0.0022. TMM10i: Dk 9.80, Df 0.0020 (can replace alumina substrates). TMM13i: Dk 12.85, Df 0.0019. All have decomposition temperature of 425°C. High-Dk variants enable circuit miniaturization for filters and compact antennas. Unlike PTFE, TMM requires no sodium naphthalene treatment. CTE is well-controlled (15-21 ppm/°C X/Y). Use TMM when you need high Dk for size reduction or want ceramic-like performance without ceramic fabrication complexity.