Metal domeare tactile components that use metal domes as switches, typically used on circuit boards such as PCBs or FPCs to function as tactile switches. The core component of a dome switch is the metal spring. When pressed, the center of the spring depresses, making contact with the circuit on the PCB, thereby forming a circuit, allowing current to flow, and enabling the product to function normally.
The single-button circular metal dome arrays are typically crafted from stainless steel, exhibiting characteristics such as low contact resistance, oxidation resistance, wear resistance, and extended service life. They are available in a variety of diameters, with common specifications ranging from 3mm to 16mm. Within the array, the springs are bonded to a PET film using an adhesive, enabling straightforward attachment to printed circuit boards (PCBs) or other substrates.
What Are the Benefits of Single-button Circular Metal Dome Arrays?
Excellent tactile feedback: The stronger rebound of the metal spring allows users to confirm the key has been triggered even in the dark by the sound it makes.
Durability: The service life of membrane switches exceeds 2 million cycles, though it is shorter than that of silver paste raised key switches (approximately 5 million cycles), making them more cost-effective.
Waterproof performance: Pot-type membrane switches are commonly used in smartphones, children's watches, and waterproof devices, offering excellent waterproof performance.
Types of Snap Dome
Circular: Available in various diameters, such as the common 3mm-16mm range, with or without dots. Those with dots can be further categorised as single-dot or multi-dot (3-5 dots). Their advantage lies in their typically longer lifespan within standard specifications.
Triangular: Offers greater strength for the same diameter. Standard dimensions range from 5mm to 12mm, with typical force ratings between 150gf and 6000gf. Can be manufactured with two legs, allowing convenient positioning on PCBs via its two corners.
Cross-shaped: Also termed quadrilateral springs, these are primarily employed in single- and double-sided boards, flexible circuits, and membrane switches. Characterised by greater height and superior tactile feedback, maximum dimensions may reach 20mm or larger, with typical force ratings of 120gf to 600gf.
Other shapes: These encompass rectangular and irregular configurations, customisable to client specifications to accommodate diverse application scenarios and structural requirements.
Hongmao is a professional supplier of metal dome arrays, dedicated to providing high-performance, highly reliable integrated tactile switch solutions. Metal dome arrays constitute standardised switch array modules by integrating multiple precision metal domes in arbitrary configurations onto flexible or rigid substrates. This technology significantly enhances production efficiency and consistency while substantially simplifying PCB assembly processes. Such consumer-grade products find extensive application across industrial equipment, medical devices, automotive electronics, and assistive technologies, proving particularly suitable for touch-control requirements in demanding environmental conditions.
Our Service
OEM / ODM
Free sample
Fast delivery
Good quality
24-hour online service
Factory direct sales wholesale
Support customization (color/ shape/ size/ material)
