en.Wedoany.com Reported - Guangzhou AiFoGuangTong Technology Co., Ltd., a Chinese radio frequency (RF) filter chip enterprise based in Guangzhou, plans to achieve a production capacity of over 1 billion filter chips this year, with current product yield rates stable at 98%–99%. In terms of shipment structure, mobile phones remain the application field with the highest shipment volume, with related products already covering mainstream brands and achieving large-scale shipments. The company, located in the Huangpu District of Guangzhou, focuses on the 5G mid-to-high frequency RF filter chip sector, with its core product being Bulk Acoustic Wave (BAW) filter chips, one of the key RF front-end components that China's communication industry has long relied on from overseas suppliers.
The function of high-frequency filter chips is to filter target frequency band signals and eliminate spurious waves and adjacent channel interference in complex wireless signal environments, directly impacting the signal reception quality, communication stability, and power consumption levels of products such as smartphones, base stations, Internet of Things (IoT) devices, and vehicle-mounted communication terminals. A single smartphone typically requires over 30 filter chips to cover multiple communication frequency bands, including nearly 10 high-frequency bands. Domestic substitution for the mid-to-low frequency bands corresponding to the 3G and 4G eras has become relatively mature, while 5G and higher communication frequency bands impose higher performance requirements on filter chips, making mid-to-high frequency BAW filter chips a more challenging breakthrough in RF front-end localization.
The focus on China's AiFoGuangTong extends beyond production capacity figures to its technological approach. U.S. semiconductor company Broadcom and U.S. RF device company Qorvo have long held patent and market advantages in 5G high-frequency filter chips, with the industry's mainstream route predominantly adopting the polycrystalline aluminum nitride (AlN) solution. AiFoGuangTong has chosen to develop its own monocrystalline aluminum nitride route, bypassing existing patent barriers of overseas enterprises, and conducts full-chain research and development covering materials, equipment, processes, structures, and mass production systems. The internal structure of monocrystalline aluminum nitride material is more ordered, making its acoustic wave transmission efficiency and piezoelectric properties more suitable for high-frequency broadband applications, reducing energy loss and increasing power capacity, thereby providing a material foundation for high-performance BAW filter chips.
From a manufacturing perspective, AiFoGuangTong has built the world's first 8-inch BAW filter chip mass production line in Guangzhou and operates under an Integrated Device Manufacturer (IDM) model. Unlike digital chips, the performance improvement of filter chips heavily depends on material deposition, structural design, lithography precision, thin film control, packaging adaptation, and process consistency. Following the monocrystalline aluminum nitride route, the company needs to re-adapt production processes and even modify and self-develop some semiconductor equipment. Precisely because this route is not a simple material replacement, its mass production capability better reflects the company's engineering level than laboratory samples.
Currently, AiFoGuangTong has achieved stable mass production of nearly 100 filter chip models, with products entering the supply chain of major terminal manufacturers such as South Korean electronics company Samsung and Chinese communication equipment company ZTE, and are applied in scenarios including 5G communications, satellite internet, IoT, and vehicle-mounted communications. The company's product frequency capability has already covered application requirements above 10GHz, providing device support for high-speed, broadband, low-loss wireless communication scenarios. As 5G-A, satellite internet, the Internet of Vehicles, and smart terminals continue to increase frequency bands and bandwidth, high-frequency filter chips will no longer be just supporting components in mobile phone RF front-ends but will enter more high-connection-density devices.
Cost and yield rates also determine whether domestic substitution can achieve large-scale supply. By building its own wafer fabrication production line, promoting domestic supporting of core materials, and optimizing material growth efficiency and chip preparation processes, AiFoGuangTong has reduced the comprehensive cost of its products compared to similar overseas solutions. The current yield rate is stable at 98%–99%, indicating that its mass production process has entered a relatively high stability range. For terminal manufacturers, filter chip suppliers must not only meet performance standards but also possess batch consistency, delivery capability, price advantages, and multi-model coverage; instability in any link can affect the introduction of the overall RF solution.
Behind the capacity expansion is the combined pull of Guangzhou's semiconductor manufacturing capabilities and the RF chip application market. AiFoGuangTong has deployed BAW filter chip production capacity in Guangzhou and Heyuan, and is advancing the construction of its Guangzhou headquarters base and cleanroom facilities. The shift from high-frequency filter chips being controlled by a few overseas companies to Chinese enterprises forming a 1 billion-chip capacity plan marks that China's key RF front-end components are moving from single-point breakthroughs to the stage of scale manufacturing. Going forward, application demands from mobile phones, base stations, drones, vehicle-mounted communications, robots, and satellite internet will continue to test the supply capability, product stability, and customer adoption speed of this monocrystalline aluminum nitride BAW route.
