LCP film gold plating | A new choice for high-temperature corrosion resistance of automotive electronics

Introduction

Driven by the "new four modernizations" of automobiles (electrification, intelligence, networking, and sharing), automotive electronics are rapidly developing towards high integration and complex functionality. The working environment is becoming increasingly harsh, especially in high temperature and highly corrosive environments, which pose serious challenges to the reliability of electronic connectors. Traditional materials and processes are gradually unable to meet the requirements, and LCP (liquid crystal polymer) thin film gold plating technology, with its excellent comprehensive performance, is becoming a new generation solution to address this challenge.

1、 What is LCP film gold plating?

Advanced Institute of TechnologyLCP film gold platingIt is an advanced composite material technology. Its substrate is LCP - a high-performance special engineering plastic film. LCP itself has excellent intrinsic characteristics, such as extremely high heat resistance, extremely low coefficient of thermal expansion, and excellent electrical insulation. The gold plating process is to cover an extremely thin but dense and uniform layer of gold on this high-performance "foundation" through precision techniques such as magnetron sputtering.

2、 Why is it a new choice for automotive electronics?

Automotive electronics, especially connectors in high heat areas such as engine compartments, transmission control units, and battery management systems (BMS) (such as FPC/FFC ribbon cables), face two core threats:

1. High temperature: Traditional materials (such as PI polyimide) are prone to aging and deformation in environments with temperatures exceeding 150 ° C, leading to unstable performance.

2. Corrosion: Moisture, vibration, and chemicals generated during vehicle operation (such as brake oil, coolant, sulfides) can corrode circuits, leading to signal transmission failure.

High thermal conductivity gold plated LCP substrateTechnology precisely solves these problems:

3. High temperature resistance: The melting point of LCP substrate is extremely high, and it can work stably in temperature environments ranging from -50 ° C to 200 ° C or even higher for a long time without deformation or degradation.

4. Corrosion resistance: The chemical properties of the gold layer are extremely stable, never rusting, and can effectively resist the erosion of various chemical media and electrochemical migration (CAF), ensuring the long-term reliability of signal transmission.

5. High reliability: The extremely low coefficient of thermal expansion results in minimal size changes during cold and hot cycles, better thermal compatibility with components such as chips, reduced stress at connections, and improved overall lifespan.

3、 Beyond traditional advantages

Compared to traditionalVacuum deposition of gold layer LCP filmThe gold plating advantage of LCP film is significant when using high-temperature plastic alone

1. More outstanding comprehensive performance: Under the same heat resistance level, the moisture absorption rate of LCP is much lower than that of PI, which means that its performance is more stable and its dielectric constant is better in humid environments.

2. Better integration and lightweight: LCP film is very thin and flexible, suitable for three-dimensional layout design in compact car spaces, which helps reduce weight and conforms to the trend of automotive lightweighting.

3. Higher long-term reliability: Its fatigue resistance, creep resistance, and chemical resistance provide a "lifetime" guarantee for automotive electronics, especially suitable for safety critical applications.

Summary

In conclusion,Advanced Institute (Shenzhen) Technology Co., LtdThe LCP thin film gold plating technology is not a simple process improvement, but a material level innovation. It cleverly combines the unparalleled matrix performance of LCP polymer with the top-notch surface characteristics of gold, providing unprecedented high temperature resistance, corrosion resistance, and high reliability guarantee for automotive electronics working in harsh environments. With the continuous evolution of automotive electronics technology, LCP film gold plating will undoubtedly become one of the key material technologies supporting the development of future intelligent connected electric vehicles, and is a "new choice" and "booster" for engineers to cope with extreme environmental challenges.