Metal domes are thin elastic components manufactured from materials such as stainless steel grades 301 or 304, beryllium bronze, or phosphor bronze, with thicknesses ranging from 0.05mm to 0.1mm. These components find extensive application in membrane switches, contact switches, printed circuit boards (PCBs), flexible printed circuit (FPC) boards, as well as within medical devices, automotive electronics, and industrial automation equipment.
Classification by Shape
Circular metal spring leaf: Commonly available in 6mm diameter, widely used for keypad contacts.
Cross-shaped metal spring leaf: Sizes up to 12.2mm, suitable for applications requiring larger contact areas.
Triangular metal spring leaf: Structurally stable, frequently employed for contact support in electronic devices.
Oval-shaped metal springs: Designed to meet specific requirements, frequently found in precision electronic components.
Classification by Structure
Flat springs: Simple construction, used for basic elastic support.
Curved leaf springs: Enhance contact sensitivity through bending design, commonly found in membrane switches.
By Material Classification
Stainless steel 301/304: Widely used in keypad leaf springs, offering corrosion resistance and high hardness.
Phosphor bronze/tin bronze: Suitable for complex shape machining, such as trapezoidal, stepped, and other non-standard leaf springs.
By Surface Treatment
Gold/Nickel Plating: Enhances conductivity and oxidation resistance, predominantly used in high-precision electronic components.
Bright Finish: Streamlines production processes, suitable for standard mechanical components.
Combinations of these classifications fulfil diverse functional requirements including key actuation, circuit connection, and vibration damping.
