Q: What makes Rogers TMM4 PCBs stand out in high-frequency circuit
design?
A: Rogers TMM4 PCBs are a unique composite of ceramic, hydrocarbon,
and thermoset polymer that combines the advantages of ceramic and
traditional PTFE laminates. With a dielectric constant of
4.50+/-0.045 and a dissipation factor of 0.0020 at 10GHz, TMM4 PCBs
offer exceptional signal integrity and reliability for strip-line
and micro-strip applications.
Q: What are the key features of Rogers TMM4 PCBs?
A: Rogers TMM4 PCBs boast a thermal coefficient of Dk of 15ppm/°K,
a thermal conductivity of 0.7 W/mk, and a decomposition temperature
(Td) of 425 °C TGA. Additionally, they have a low moisture
absorption rate of 0.07%-0.18% and a dielectric constant that
matches thermal expansion to copper, making them ideal for
high-performance applications.
Q: What are the benefits of using Rogers TMM4 PCBs?
A: The benefits of using Rogers TMM4 PCBs include mechanical
properties that resist creep and cold flow, making them suitable
for high-reliability applications. They are also resistant to
process chemicals, minimizing damage during fabrication.
Furthermore, the thermoset resin base allows for reliable
wire-bonding and high reliability of plated through holes.
Q: What is the construction and stackup of Rogers TMM4 PCBs?
A: Rogers TMM4 PCBs feature a 2-layer rigid PCB setup with a Rogers
TMM4 Core thickness of 0.762 mm (30mil) and copper layers of 35 μm.
The finished board dimensions are 192mm x 115mm, with a minimum
Trace/Space of 5/7 mils and a Via plating thickness of 20 μm. The
surface finish is Immersion Gold, and the top solder mask is green.
Q: In what applications are Rogers TMM4 PCBs commonly used?
A: Rogers TMM4 PCBs are frequently used in RF and microwave
circuitry, power amplifiers, filters, satellite communication
systems, Global Positioning Systems antennas, patch antennas, and
chip testers. Their versatility and reliability make them
well-suited for a wide range of high-frequency applications.
Q: What standards and specifications do Rogers TMM4 PCBs adhere to?
A: Rogers TMM4 PCBs meet IPC-Class-2 standards and are globally
available. They come with Gerber RS-274-X artwork and undergo 100%
electrical testing before shipment, ensuring consistent quality and
performance for high-frequency circuit designs.
