Article Copper Foil Manufacturing 2 min read • January, 2015 • Material Use Cases › Electrical and Electronics • Last technical review: 2026 Abstract Copper foil manufacturing has become increasingly vital in modern electronics and industrial applications. This article examines two primary manufacturing methods: electrodeposition and rolling processes. These techniques produce copper foils with specific characteristics suited for various applications, particularly in electronic devices and printed circuit boards (PCBs). Introduction Copper, alongside aluminum, stands as one of the most versatile non-ferrous metals in industrial applications. The demand for copper foil has experienced significant growth, particularly in electronic products such as mobile phones, digital cameras, and various IT devices. This surge in demand has led to continuous improvements in manufacturing processes and quality control methods. Manufacturing Methods Electrodeposition Process The electrodeposition method produces copper foils through a sophisticated electrochemical process. High-grade copper is first dissolved in an acid solution to create a copper electrolyte. This solution is then pumped into a system with partially immersed, electrically charged rotating drums. The process involves: A titanium rotating drum serving as the cathode Copper solution containing the anode DC voltage source application Controlled rotation speed for thickness management Figure 1: Electrodeposited Copper Manufacturing Process Find Materials for Electrical and Electronics Applications Explore referenced material data for metals and alloys used in electrical and electronic applications. Find Suitable Materials Take a Guided Tour › The resulting copper foil features distinct characteristics on each side: a smooth drum side and a rougher opposite surface. The thickness of the deposit is inversely proportional to the drum's rotation speed. Surface treatments are subsequently applied to both sides to enhance adhesion properties and prevent oxidation, particularly crucial for PCB applications. Rolling Process The rolling method represents a more traditional approach to copper foil production. Figure 2: The rolling process of copper foils The process involves several key stages: Initial heating of copper blocks (approximately 5m x 1m x 130mm) to 750°C Hot rolling to reduce thickness by 90% Scale removal through milling Cold rolling to achieve approximately 4mm thickness Heat treatment at 550°C to restore malleability Figure 3: Copper foil products