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20 mil RO4003C PCB
20 mil RO4003C PCB

TMM10 High Frequency PCB

  • March 29. 2023

Today, we are going to discuss about a type of thermoset microwave material ----TMM10 PCB.

Rogers TMM 10 PCB is a ceramic thermoset polymer composite designed for high PTH hole reliability on strip-line and micro-strip applications. It offers the benefits of both PTFE and ceramic based substrates, but is not limited by the same mechanical properties and production techniques.

75 mil TMM10 PCB

Let's start by reviewing the TMM10 data sheet.

TMM1O PCB Date sheet

We can see that TMM10 is high dielectric constant material, process Dk valuing 9.2. High DK material is helpful for these devices which need small volume in size such as filters and couplers etc.

Dissipation factor is as low as 0.0022 at 10 GHz.

Thermal coefficient of dielectric constant, also known as the temperature coefficient of dielectric constant (TCDk) comes next.

TCDk less than |50| ppm/°C is considered desirable for all materials as DK changes with temperature.

TMM10 has a TCDk of 38 absolute value here, indicating that it has a good TCDk value and is ideal for application in areas such as automotive electronics or 5G base station etc. where boards have to be mounted in highly variable temperature environments.

Volume resistivity and surface resistivity are good.

The decomposition temperature(Td) can bear 425℃(Thermogravimetric Analysis - TGA). This is a safe temperature during PCB assembly.

Coefficient of thermal expansion in X Y Z is similar to that of copper, this ensure its mechanical properties resist creep and cold flow.

TMM10 is a sort of thermal management board with a thermal conductivity of 0.76 W/m/K.

Then next, the copper peel strength after thermal stress is 5.0 lbs/inch (0.9 N/mm).

The flexural strength in machine direction and cross direction is 13.62 Kpsi, and flexural modulus is 1.79 Mpsi.

Moisture absorption for 1.27mm material is 0.09% and 0.2% for 3.18mm thickness.

The specific gravity is 2.77 and the specific heat capacity is 0.74 J/g/K.

TMM10 is lead free process compatible.

There is our PCB capability on TMM10 material.

TMM10 PCB Capability

We have single layer board, double layer board, multi-layer board and hybrid designs available. Finished copper on tracks can be 1oz and 2oz.

TMM10 PCBs are available in a variety of thicknesses, including the commonly used 20 mils, 30 mils, 50 mils, and 60 mils. There are also high thicknesses such as 200 mils, 300 mils, and 500 mils, among others.

Our maximum PCB size on high frequency materials is 400mm by 500mm, which can be a single board in the sheet or multiple designs in this panel.

Solder masks in green, black, blue,red and yellow etc are available in house.

Immersion gold, HASL, immersion silver, and immersion tin, as well as OSP, ENEPIG, and pure gold are available to protect the SMD pads.

TMM10 PCB mainly use in power amplifiers and combiners, filters and couplers, satellite communication systems, global positioning systems antennas and patch antennas etc.

2L 50mil TMM10 PCB

TMM10 materials are resistant to process chemicals, and damage is reduced during the whole circuit fabrication. It does not require a sodium napthanate treatment prior to electroless plating and it allows for reliable wire-bonding due to its thermoset resin.

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