IPC Class 2 Control BT PCB Printed Circuit Board With Black Silkscreen Color

Product Specification

Product Description

BT Substrate is a high-performance printed circuit board material composed of Bismaleimide (BMI) and Triazine (TZ) resins, reinforced with glass fiber or organic fillers. Developed by Mitsubishi Gas Chemical, it excels in high-frequency and high-reliability applications. Key attributes include ultra-low dielectric loss, exceptional thermal stability, and minimal CTE (Coefficient of Thermal Expansion), making it ideal for IC substrates, RF modules, and advanced semiconductor packaging (e.g., FC-BGA, CSP).

Key Advantages

Typical Applications of BT Substrates

1. Semiconductor Packaging

   • FC-BGA (Flip-Chip Ball Grid Array) substrates for CPUs/GPUs
   • CSP (Chip Scale Package) for miniaturized IoT sensors
   • SiP (System-in-Package) modules integrating RF + logic dies

2. High-Frequency Electronics

   • mmWave Radar PCBs: 77/79GHz automotive radar, 5G/6G phased-array antennas
   • Satellite Comms: LEO satellite transceiver substrates (Ka/V-band)
   • RF Front-End Modules: PA/LNA circuits with 1kW accelerator cards
   • AR/VR Microdisplays: Low-loss flex-BT for micro-OLED drivers

Emerging Applications (2025 Industry Trends)

1. Miniaturization and High-Density Interconnects (HDI)
With the continuous miniaturization of electronic devices like smartphones and wearables, there's a growing need for smaller and thinner PCBs. BT resin's excellent thermal and mechanical properties allow for the creation of extremely thin and multi-layered boards. This trend will lead to the widespread adoption of HDI technology, including via-in-pad and microvias, to increase component density and reduce board size.
2. Enhanced High-Frequency Performance
The rollout of 5G and the development of 6G, along with advancements in AI and high-speed data transmission, are pushing the demand for materials with superior high-frequency performance. BT resin has a low dielectric constant (Dk) and dissipation factor (Df), making it an ideal material for these applications. In 2025, we will see a greater focus on developing even lower-loss BT materials and optimizing PCB design to support faster signal speeds and reduce signal integrity issues.
3. Improved Thermal Management
As electronic devices become more powerful and compact, managing heat is a critical challenge. BT PCBs have excellent heat resistance, but the trend is towards incorporating more advanced thermal management solutions directly into the board. This includes using thermal vias, metal cores, and integrating materials with higher thermal conductivity to efficiently dissipate heat and ensure the reliability and longevity of the components.
4. Advanced Manufacturing Processes
The push for higher performance and density requires more advanced and precise manufacturing techniques. We can expect to see wider adoption of advanced processes such as laser drilling for microvias, specialized etching techniques for fine lines and spaces, and sophisticated lamination processes to handle complex multi-layer structures. These improvements will be necessary to meet the stringent requirements of next-generation devices.
5. Sustainability and Eco-Friendly Materials
There is a growing global emphasis on sustainable manufacturing. While BT resin is a high-performance material, the industry is also exploring ways to make production more environmentally friendly. This includes research into halogen-free BT resins and more efficient, less wasteful manufacturing processes to reduce the environmental footprint of PCB production.