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TMM4 High Frequency PCB

China Bicheng Electronics Technology Co., Ltd certification
China Bicheng Electronics Technology Co., Ltd certification
Kevin, Received and tested the boards - thanks very much. These are perfect, exactly what we needed. rgds Rich

—— Rich Rickett

Ruth, I got the PCB today, and they are just perfect. Please stay a little patience, my next order is coming soon. Kind regards from Hamburg Olaf

—— Olaf Kühnhold

Hi Natalie. It was perfect, I attach some pictures for your reference. And I send you next 2 projects to budget. Thanks a lot again

—— Sebastian Toplisek

Kevin, Thanks, they were perfectly made, and work well. As promised, here are the links for my latest project, using the PCBs you manufactured for me: Regards, Daniel

—— Daniel Ford

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TMM4 High Frequency PCB
Latest company news about TMM4 High Frequency PCB

Hi Guys,

Welcome back to our channel.

Today, We’re going to talk about a type of high frequency PCB built on thermoset microwave material---TMM 4


Rogers TMM 4 PCB is a ceramic, hydrocarbon, thermoset polymer composite designed for stripline and microstrip applications. It has strong mechanical and chemical properties combined many of the benefits of both ceramic and traditional PTFE materials. It is based on thermoset resins which allows for reliable wire-bonding without pad lifting or substrate deformation.



Now let’s look at the data sheet to learn the property of TMM 4.


latest company news about TMM4 High Frequency PCB  0


TMM 4 has dielectric constant value of 4.5 +/- .045 at 10GHz, the tolerance is very tight.


Then dissipation factor is .002 at 10GHz, very low dissipation factor.


Next, the thermal coefficient of dielectric constant (TCDK) is as low as 15 ppm/°C from -55°C to +125°C. Ideally, TCDK should be 0 ppm / ℃, that is, Dk does not change with temperature. So, as a digital reference, a TCDk less than | 50 | ppm / ℃ or lower can be considered better.


The coefficient of thermal expansion of three axes (16,16 and 21 ppm/°C) is very closely matched to copper, so TMM4 PCB production has very high reliable plated through holes and low etch shrinkage values.



latest company news about TMM4 High Frequency PCB  1


For TMM 4 PCBs, we can provide you with single layer board, double layer board, multi-layer board and hybrid types.


TMM 4 PCBs have wide thickness. There are the standard thickness such as 20 mils, 30 mils, 50 mils and 60mils etc. and non-standard thickness such as 15 mils, 25 mils,75 mils, and 125 mils etc. It’s as thin as 15 mils and as thick as 500 mils for our designers.


Finished copper on PCB can be 1oz, 2oz and 3oz. Our maximum PCB size on high frequency materials is 400mm by 500mm, it can be a single board in the sheet and also can be different designs in this panel.


Solder mask of green, black, blue and yellow etc is available in house. There’s immersion gold, HASL, immersion silver, immersion tin, pure gold and bare copper etc. for pads plating.


TMM 4 PCBs are typically used in power amplifiers and combiners, filters and couplers, satellite communication systems, GPS antennas, dielectric polarizers and lenses etc.



TMM 4’s mechanical properties resist creep and cold flow. It is resistant to process chemicals, reducing damage during fabrication. All common PCB manufacturing processes can be used with TMM 4 materials, so the volume mass production is available for marketing.


Pub Time : 2023-03-27 16:41:15 >> News list
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