F4BME275 Substrate High Frequency Laminates Copper Clad Sheet

The F4BME275 is a precision-engineered high-frequency laminate manufactured from glass fabric, PTFE (polytetrafluoroethylene) resin, and PTFE film through strictly controlled lamination processes. Compared to standard F4B materials, it delivers enhanced electrical performance including a wider dielectric constant range, lower dissipation factor, higher insulation resistance, and superior stability, positioning it as a reliable alternative to equivalent international products.

The F4BM275 and F4BME275 variants share an identical dielectric core but feature different copper foil configurations:

F4BM275 incorporates ED (electrodeposited) copper foil, ideal for applications without Passive Intermodulation (PIM) requirements.

F4BME275 utilizes reverse-treated RTF (reverse treated foil) copper foil, delivering excellent PIM performance, enabling finer circuit resolution, and achieving lower conductor loss.

By precisely adjusting the PTFE-to-glass fabric ratio, both F4BM and F4BME achieve targeted dielectric constants while maintaining low loss and superior dimensional stability. Higher dielectric constant grades contain increased glass proportions, resulting in enhanced dimensional stability, reduced coefficient of thermal expansion (CTE), and improved temperature drift characteristics, though with a marginal increase in dielectric loss.

Product Features

• DK2.17 ～3 is optional, and DK can be customized
• Low loss
• F4BME with RTF copper foil delivers excellent PIM performance
• Diverse sizes for cost savings
• Radiation resistance and low outgassing
• Commercialized, mass-producible, and cost-effective

Typical Applications

• Microwave, RF, radar
• Phase shifters, passive components
• Power dividers, couplers, combiners
• Feeding networks, phased array antennas
• Satellite communications, base station antennas

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