In the workshop of Shenzhen Xinchenger Electronics Co., Ltd., workers are conducting final inspections on a batch of high-frequency circuit boards destined for 5G base stations. These seemingly ordinary boards carry the key technologies underpinning the upgrade of China’s communications industry.
This Shenzhen-based company maintains a permanent inventory of the world’s top-tier high-frequency laminates, including Rogers, Taconic, and Isola, with dielectric constants covering the full range from 2.2 to 16.
With over a decade of experience in high-frequency microwave RF circuit board production, Xinchenger Electronics specializes in rapid prototyping and small-to-medium volume manufacturing of special PCBs, including 2-36 layer high-frequency boards, microwave RF boards, and ceramic circuit boards. From 5G base stations and radar systems to satellite communications and AI servers, the company’s products quietly form the core backbone of China’s new infrastructure.
01 Industry Background
High-frequency, high-speed circuit boards act as the “expressways” of modern electronics, specifically designed for high-speed signal transmission and high-frequency applications. These boards are characterized by low dielectric constant (Dk) and low dissipation factor (Df), minimizing signal loss during transmission.
The global market for high-frequency, high-speed boards is experiencing explosive growth. Data indicates that the global market size reached approximately $3.92 billion in 2023, with the Chinese market showing particularly significant expansion. As a critical component in the industry chain, the market size for high-frequency, high-speed copper-clad laminates (CCLs) in China is projected to reach 17.5 billion RMB by 2026.
02 Technical Barriers
High-frequency PCB manufacturing is far from a simple upgrade of standard PCB production; it is a systems engineering challenge encompassing materials science, precision processing, and signal integrity engineering.
The core parameters for high-frequency materials are extremely stringent. Taking dielectric constant as an example, common FR-4 materials have a Dk of 4.2–4.8, while high-frequency laminates like Rogers RO4350B require strict control within a tight tolerance of 3.48 ±0.05. High-frequency applications demand an extremely low dissipation factor, typically less than 0.004, compared to common FR-4’s Df of 0.018–0.025.
In terms of machining precision, high-frequency boards require trace width tolerance controlled within ±8%, and layer-to-layer alignment accuracy must be below 50 micrometers, placing exceptionally high demands on both manufacturing equipment and technical personnel.
03 Application Fields
High-frequency PCB technology has become essential “infrastructure” in cutting-edge fields like 5G communications, satellite communications, and artificial intelligence.
In 5G base station construction, high-frequency boards are the core components of RF antennas, directly determining signal transmission quality and coverage range. In satellite communications, they play key roles in devices like low-noise block downconverters (LNBs) and very small aperture terminals (VSATs).
With the surge in demand for AI servers, motherboard layer counts are jumping from 20 to 30-40 layers, presenting unprecedented challenges for the dielectric properties and thermal management capabilities of the boards.
The proliferation of automotive millimeter-wave radar has also opened a vast market for high-frequency PCBs. Advances in autonomous driving technology continue to increase the number of radars per vehicle, directly driving demand growth for PCBs used in high-frequency band automotive radars like 77GHz.
04 Material Strategy
Materials are the foundation of high-tech manufacturing, and Xinchenger Electronics understands this well. The company has established a comprehensive global supply chain system for high-frequency laminates, maintaining full-series stock of internationally renowned brands like Rogers, Taconic, Isola, and PTFE (Polytetrafluoroethylene).
Selecting high-frequency materials requires a comprehensive consideration of frequency range, loss requirements, and cost factors. For instance, Rogers RO4350B is suitable for 5G base station applications below 6GHz, while Taconic RF-35 is specifically designed for millimeter-wave radar.
In recent years, domestic Chinese high-frequency laminate suppliers have also made significant strides. Companies like Shengyi Technology are continually increasing R&D investment, accelerating the process of domestic substitution.
05 Manufacturing Capabilities
Xinchenger Electronics has accumulated over ten years of process expertise in high-frequency PCB manufacturing, forming a complete capability from rapid prototyping to small-to-medium batch production. The company offers a 24-hour rapid prototyping service to help customers seize market opportunities.
In high-frequency PCB manufacturing, impedance control is one of the core technologies. Xinchenger can achieve single-ended impedance tolerance control of ±5Ω, far exceeding the ±10Ω standard for ordinary circuit boards.
To meet the special requirements of high-frequency signals, the company employs back-drilling technology to control stub length, ensuring signal integrity. Concurrently, it uses ultra-low profile (ULP) copper foil to control copper surface roughness below 1.5 micrometers, reducing skin effect loss in high-frequency signals.
06 Market Opportunities and Challenges
Currently, the high-frequency PCB industry faces multiple development opportunities. China’s national development plans prioritize scientific innovation and industrial upgrading, providing policy support for the industry’s growth.
Changes in the international landscape have also spurred demand for domestic substitution. Adjustments in tariff policies have prompted downstream companies within China to place greater emphasis on supply chain security, creating market opportunities for domestic high-frequency PCB manufacturers with strong technical capabilities.
The industry also confronts challenges such as a shortage of high-end talent, significant R&D investment requirements, and market volatility. Manufacturing high-frequency PCBs requires interdisciplinary expert teams, a talent pool that remains relatively scarce in the market.
The global high-frequency, high-speed PCB market is relatively concentrated, with the top five manufacturers holding approximately 50% market share. Domestic Chinese enterprises need to continuously strive in technological innovation and brand building to secure a place in international competition.
In the testing room at Xinchenger Electronics, a technician uses a vector network analyzer to measure the S-parameters of a batch of high-frequency boards. The dancing curves on the instrument screen map the precise path of signals traveling through the boards.
As 5G networks expand into higher frequency bands and low-earth orbit satellite internet achieves global deployment, the market demand for high-frequency PCBs is shifting from “specialized need” to “essential necessity.”
In electronics manufacturing hubs like Shenzhen, companies like Xinchenger Electronics are finding their position amidst the wave of technological advancement. What they provide is not merely products, but a testament to the potential for China’s high-end manufacturing sector to break through to the next level.