Today, the feature is our newly shipped PCB which based on TMM4 substrates. TMM4 is a state-of-the-art thermoset microwave material designed specifically for high plated-through-hole reliability strip-line and microstrip applications. This ceramic, hydrocarbon, thermoset polymer composite combines the mechanical and chemical advantages of ceramic and traditional PTFE laminates while eliminating the need for specialized production techniques.

Featuring a dielectric constant (Dk) of 4.50 +/- .045 and a dissipation factor of .0020 at 10GHz, TMM4 provides excellent electrical performance for RF and microwave circuitry. Its thermal coefficient of Dk of 15ppm/°K ensures stability over a wide range of temperatures, while the coefficient of thermal expansion matched to copper guarantees dimensional integrity. TMM4 exhibits a decomposition temperature (Td) of 425 °C TGA, making it exceptionally resistant to heat. With a thermal conductivity of 0.7 W/mk, it efficiently dissipates heat, contributing to the overall reliability of the system.

TMM4's mechanical properties resist creep and cold flow, ensuring long-term performance and reliability. It is also highly resistant to process chemicals, minimizing damage during fabrication. The use of a thermoset resin in its composition allows for reliable wire-bonding without the risk of pad lifting or substrate deformation. TMM4 is compatible with all common PWB processes, making it versatile and easy to integrate into existing manufacturing workflows.

This PCB is a 2-layer rigid board with a copper weight of 35 μm on each outer layer. The board dimensions are a circle with a diameter of 83mm, with a finished thickness of 0.8mm. The minimum trace/space is 6/8 mils, and the minimum hole size is 0.35mm. It undergoes a thorough 100% electrical test prior to shipment, ensuring its quality and reliability.

TMM4 PCBs find applications in a wide range of industries. They are particularly suitable for RF and microwave circuitry, power amplifiers, combiners, filters, couplers, satellite communication systems, global positioning systems antennas, patch antennas, dielectric polarizers and lenses, and chip testers. With its outstanding electrical performance, mechanical reliability, and compatibility with standard PWB processes, TMM4 PCBs deliver exceptional performance and durability.

This PCB based on TMM4 adhere to the IPC-Class-2 quality standard and are available worldwide. The supplied artwork is in Gerber RS-274-X format, ensuring compatibility with standard PCB manufacturing processes.

With its exceptional electrical performance, mechanical reliability, and compatibility with standard PWB processes, TMM4 PCBs offer a reliable and high-quality solution for demanding RF and microwave applications. With worldwide availability and support, TMM4 PCBs empower engineers and designers to unleash their creativity and push the boundaries of what's possible in the world of RF and microwave circuitry.

Company Profile

Founded in 2003, Shenzhen Bicheng Electronics Technology Co., Ltd is an established high frequency PCB supplier and exporter in Shenzhen China, severing cellular base station antenna, satellite, high frequency passive components, microstrip line and band line circuit, millimeter wave equipment, radar systems, digital radio frequency antenna and other fields worldwide for 18 years. Our high frequency PCBs are mainly built on 3 high frequency material brands: Rogers Corporation, Taconic and Wangling. Dielectric constant ranges from 2.2 to 10.2 etc.

Bicheng PCB is headquartered in Shenzhen, a city with great economic vitality. Based in China, we adhere to the philosophy of servicing small and medium sized companies offering variety of circuit boards to meet the demands of market.

Main Business & PCB Applications

We maintain the highest standards which support products that exhibit exceptional quality, performance and reliability. We also have divisions of FR-4 circuit board, flexible circuits and metal core PCBs featured as prototypes, small runs to mass production. We actively research and build such high value added PCB projects as HDI, quick turn, impedance control, heavy copper and backplane board etc. This has made our PCB products generate an effective prolongation and complementation, as well as formation of integrated products line ranging from low-end to high-end.The circuit boards are used in the industries of home appliances, portable and consumable electronics, medical filed, aerospace as well as telecommunications etc.

Main Material Partners