As we all know, Zhuosheng Micro is a company focusing on the research, development and sales of RF integrated circuits, mainly providing RF switches, RF low noise amplifiers, RF filters and other RF front-end discrete devices and various module application solutions to the market. At the same time, the company also provides low-power Bluetooth microcontroller chips. The company’s products are currently mainly used in mobile smart terminals such as smart phones, as well as Electronic products such as smart homes and wearable devices. Relying on the company’s long-term technical accumulation, the company’s products are gradually expanding to more diverse terminal markets and customers, covering communication base stations, automotive electronics and other application fields. The company adheres to independent research and development of core technologies, and has become a leading enterprise in domestic chips in the field of RF front-end segmentation.
However, in order to become a stronger RF giant, Zhuoshengwei plans to raise a total of no more than 3,005,537,700 yuan through the stock issuance plan, and the net raised funds after deducting the issuance costs are all invested in the following projects:
First, look at the specific plans for the R&D and industrialization projects of high-end RF filter chips and modules;
Zhuoshengwei said that the RF filter is a key device for signal transmission frequency selection in mobile communication. It is mainly used to retain signals in a specific frequency band and filter out signals outside a specific frequency band. It is one of the core devices in the field of mobile communication. RF filters are widely used in wireless communications, satellite navigation, microwave communications, mobile communications and other fields. Mobile smart terminals such as mobile phones are currently the largest application market for RF filters.
According to the basic structure, filters can be divided into discrete Inductor-capacitor filters, multilayer ceramic filters, monolithic ceramic filters, acoustic filters and cavity filters. Acoustic filters have become the industry standard for the RF front-end of current mobile smart terminal equipment due to their comprehensive advantages such as small size, high reliability, and cost-effectiveness. Acoustic filters include surface acoustic wave filters (SAW) and bulk acoustic wave filters (BAW). Size, cost and performance are key considerations in the practical application of filters. SAW and BAW are the mainstream filter forms currently used in mobile smart terminals, occupying the low-frequency and high-frequency markets respectively, and have the advantages of small size, low cost, and high reliability.
This project will carry out the design and development of high-end filters for high-performance and complex applications to form process technology capabilities and mass production capabilities. Through the joint investment of resources and cooperation with Foundry to establish a dedicated front-line wafer production line, it aims to further expand high-end filter products, meet customer needs for customized, high-performance, and high-complexity RF filters, and seize the high-end RF filter market. share, cover various application scenarios of low, medium and high frequency bands, and establish a complete product line of RF filters. The products of this project will be mainly used in mobile smart terminal equipment. The research and development of high-end filters, combined with the construction of the company’s fundraising and investment projects at the time of the company’s initial public offering, can realize the complete industrialization of the company’s filter product line in the field of mobile smart terminals.
The construction of this project is divided into two phases. The first phase is the first three years of the project construction, and the second phase is the fourth and fifth years of the project construction. The main work of the two phases includes: 1. Design and develop high-performance, high-performance 2. Establish a process platform for high-frequency and high-performance filters, and cooperate with Foundry to complete process adjustment and process capability improvement.
Zhuo Shengwei pointed out that the company’s rich experience in R&D and design and mature customer base have laid the foundation for the smooth implementation of this project. The company has established a mature SAW filter R&D, design and production team. Many members of the team have obtained doctoral or master’s degrees from first-class universities or research institutes at home and abroad. The core members of the R&D team have many years of filter design, development, process debugging, and rich experience. Experience in packaging technology of filter chips and modules.
After years of technology accumulation and business accumulation, the company has successfully verified the front-end design process and the back-end production process, and has launched GPS filters for satellite positioning systems, WiFi filters for wireless interconnection front-ends, and mobile communication filters. Filters and other SAW filter products, the above products have been mass-produced or shipped. At the same time, the company’s R&D team has officially launched RF filter diversity receiving module (DiFEM), RF low noise amplifier/SAW filter integrated module product (LFEM) with continuous innovation and breakthrough. The successful development has laid a solid foundation for the realization of high-end RF filters.
Next, let’s look at the specific plans for the R&D and industrialization projects of radio frequency devices for 5G communication base stations;
According to Zhuoshengwei’s point of view, the communication base station is the core link that provides wireless coverage and signal transmission and reception, and can realize wireless signal transmission between wired communication networks and wireless terminals. In the era of 3G/4G communication, the communication base station consists of an independent antenna (antenna feeder), RRU (radio frequency unit) and BBU (baseband unit). The RRU is the intermediate bridge between the antenna system and the baseband processing unit. When receiving a signal, the RRU filters, low-noise amplifies, converts the radio frequency signal from the antenna into an optical signal, and transmits it to the BBU; when sending a signal, the RRU converts the optical signal from the BBU into a radio frequency signal and sends it out through the antenna. . The radio frequency device is mainly located in the RRU and is the key device that affects the mobile communication quality of the communication base station. The radio frequency devices of the communication base station include power amplifiers, filters, radio frequency switches and other devices.
Different from the low cost, small size, and low power consumption required by mobile terminal radio frequency devices, high performance, high reliability and high stability are the key factors to be considered in the practical application of communication base station radio frequency devices. There are essential differences in the selection of materials and mobile terminal radio frequency devices. For 3G and 4G communication base stations, due to their wide coverage, radio frequency devices need to have high output power, thereby increasing the signal transmission distance of the communication base station.
Under the new 5G standard, the communication base station integrates the passive antenna and the RRU (radio frequency unit) into an integrated active antenna (AAU), and splits the BBU into CU (distributed unit) and DU (centralized unit). Due to the changes in the 5G base station architecture, the RF front-end structure of the communication base station has also been upgraded, integrating power amplifiers, filters, transceivers, and antenna elements on a single PCB. In order to better guarantee the communication quality of base stations, excellent radio frequency devices of communication base stations need to have the advantages of high output power, low power consumption, and low cost.
This project will carry out the design and development of RF devices for high-frequency, high-performance, high-power, and complex applications, suitable for 5G communication base stations, to form process technology capabilities and mass production capabilities. By co-investing resources with Foundry to establish a dedicated front-line wafer production line, we will continue to innovate and research new technologies, new materials and new processes, and expand the application field of communication base stations. The products of this project will be mainly used in 5G communication base station equipment. The research and development of 5G communication base stations this time, combined with the company’s previous technology and resource accumulation in the field of mobile smart terminals, can enable the company to further cover more diverse terminal markets and application fields, and form a differentiated product layout.
The construction of this project is divided into two phases. The first phase is 3 years before the project construction, and the second phase is the 4th and 5th years of the project construction. The main work of the two phases includes: 1. Design and development suitable for 5G frequency bands 2. Establish process platforms related to various products, including technology platforms related to new materials and new processes, and cooperate with Foundry to complete process adjustment and process capability improvement.
Zhuoshengwei also emphasized that the company has been actively investing in R&D and innovation, focusing on improving the competitiveness of core technologies. The company has established a mature RF device and module R&D design and production team. Many members of the team have obtained doctoral or master’s degrees from first-class universities or research institutes at home and abroad. The core members of the R&D team have many years of RF device design, development, and process debugging. And rich experience in packaging technology of RF devices and modules.
Through continuous innovation and independent research and development, the company’s products have strong technological leadership, and have established a complete and leading technology platform, covering RF CMOS, SOI, SiGe, GaAs, piezoelectric crystals and other materials and related processes. After years of technology accumulation and business accumulation, the company’s RF device design and development technology has reached the domestic leading level.
Therefore, the company’s R&D technology reserves in the RF front-end are relatively sufficient. Combined with the existing R&D achievements and technical reserves, the company has the ability to further expand to more diversified application fields. The technical feasibility of this project is relatively high.