The rapid development of electronic devices in the direction of miniaturization, high performance, intelligence, and greenization has driven the continuous innovation of PCBA new materials technology, and the application trends of new materials are gradually clear, focusing on improving thermal conductivity, reducing signal loss, enhancing flexibility, and complying with environmental regulations. Traditional FR-4 substrates can no longer meet the needs of high-end electronic products, and a variety of new materials such as high-performance composites, flexible substrates, and environmentally friendly materials are gradually replacing traditional materials, becoming the core driving force for the upgrading of the PCBA industry. In 2025 and beyond, the application of PCBA new materials will show a diversified and high-end development trend, closely integrating with application scenarios such as AI, new energy, and bioelectronics to realize the coordinated improvement of performance and cost.

One of the main trends is the wide application of high-performance substrate materials to meet the needs of high-frequency and high-speed signal transmission. With the popularization of 5G, 6G, and AI server technologies, PCBA needs to handle higher frequency signals (up to 100GHz for mmwave), requiring substrate materials with low dielectric constant (DK) and low dielectric loss (DF). PTFE (polytetrafluoroethylene)-based materials, such as Rogers RT/duroid® 5880 and Taconic TLY-5, have become the first choice for high-frequency PCBA, with DK as low as 2.1 and DF < 0.001 at 10GHz, ensuring minimal signal loss during transmission. In addition, M9-level high-frequency and high-speed copper-clad plates (DK≤3.2, DF≤0.0008) are being widely used, breaking the bottleneck of traditional material loss and adapting to the high-speed transmission needs of AI servers and high-frequency communication devices. Modified FR-4 materials, such as high-Tg FR-4 (Tg>170℃) and low-DK FR-4 (DK≈3.8), are also widely used in mid-to-high-end industrial and consumer electronics, balancing performance and cost.

Flexible and rigid-flex substrate materials are another important application trend, driven by the development of wearable devices, implantable medical devices, and miniaturized electronic products. Flexible substrates such as polyimide (PI) and polyester (PET) have excellent mechanical flexibility and can be bent, folded, and stretched without damaging the circuit, making them ideal for flexible PCBs in wearable health trackers, smart patches, and epidermal sensors. Rigid-flex PCBs, which combine rigid and flexible substrates in the same structure, reduce the need for external cables and connectors, minimizing the overall size of the device while improving reliability and durability. They are widely used in space-constrained scenarios such as implantable medical devices and compact wearable devices. In addition, transparent conductive materials, such as indium tin oxide (ITO) and graphene, are gradually applied to PCBA, enabling the development of transparent electronic devices and expanding the application scope of PCBA.

Green and environmentally friendly materials have become an inevitable trend in PCBA development, driven by global environmental regulations such as RoHS and REACH. Halogen-free FR-4 materials, which replace brominated flame retardants, are widely used in medical, consumer, and industrial electronics to meet environmental protection requirements. Lead-free solder and are gradually replacing traditional lead-containing materials, reducing environmental pollution and health risks. At the same time, recyclable materials and energy-saving manufacturing processes are being promoted: tin slag recycling rate reaches more than 95%, and energy consumption of energy-saving reflow ovens and placement machines is reduced by 30%-50%, realizing the green development of PCBA manufacturing. In addition, bio-based materials, such as biodegradable polymers, are being researched and applied, which are expected to solve the problem of electronic waste pollution and promote the sustainable development of the PCBA industry. Overall, the application of PCBA new materials will continue to focus on performance improvement, scenario adaptation, and environmental protection, providing strong support for the innovation and development of the electronic industry.