If your product has more than three buttons on a PCB, you should not be placing metal domes one by one. A custom dome sheet array - sometimes called a metal dome array, dome array sheet, or simply a dome sheet - pre-positions every stainless-steel snap dome on a single adhesive-backed PET film, so your assembly line can peel and stick the entire keypad layout in one step. This guide explains the constructions, materials, specifications, MOQ and lead times that B2B buyers should evaluate before requesting a quote from a dome sheet array manufacturer.
A custom PET dome sheet array is aligned over the PCB contact pads and laminated in one peel-and-stick step - no dome-by-dome placement.
Why Buy a Dome Sheet Array Instead of Loose Metal Domes?
Loose metal domes are the right choice only for very simple, single-key products. As soon as a keypad has a multi-key matrix - TV and air-conditioner remotes, walkie-talkies, game controllers, medical handhelds - a pre-assembled dome array delivers three measurable advantages:
Placement accuracy. Every dome is positioned by automated assembly equipment to ±0.05 mm, eliminating manual placement errors and the resulting dead keys.
Faster assembly. Operators apply one sheet instead of placing dozens of individual domes, cutting keypad assembly time dramatically on high-volume lines.
Protection. The PET carrier shields domes from dust and moisture before the graphic overlay is applied, improving yield and long-term reliability.
For products that also need the circuit itself, Shanyo offers FPC + dome sheet array integrated modules, where the flexible circuit and the dome array are produced and aligned in the same factory - a popular option for sports watches and wearable devices where assembly space is tight.
Choose the Right Construction: Six Standard Dome Array Types
A qualified dome array supplier should offer more than one construction. Shanyo engineers six standard dome array constructions, each optimized for a different tactile profile, environment and assembly workflow:
| Construction | Key Feature | Best For |
|---|---|---|
| Single-layer dome array | Lowest cost, 10–200 gf, <100 mΩ | Remote controls, calculators, cost-driven consumer keypads |
| LGF-integrated dome array | Light-guide film for uniform LED backlighting | Backlit remotes, automotive infotainment, smart-home panels |
| UV-bump dome array | Raised tactile dots for blind operation, PEN substrate, 1M cycles | Industrial handhelds, POS terminals, walkie-talkies |
| Bend-insulated dome array | Pre-bent spacer prevents shorting, custom-tooled gap | Automotive steering-wheel switches, appliance panels, industrial HMIs |
| Bend + 3M adhesive dome array | High-tack 3M tape, PI/beryllium-copper option rated 5M cycles | Automotive smart-cockpit panels, outdoor equipment, medical interfaces |
| IP67/IP68 sealed dome array | Labyrinth-edge seal + nano-hydrophobic coating, 5M+ cycles | Outdoor and marine keypads, food equipment, wet-environment HMIs |
Typical dome sheet array stack-up: adhesive backing, PET/PEN/PI substrate, pre-aligned snap domes and an optional LGF backlight layer.
Material Tiers: PET vs PEN vs PI Substrates
The substrate and dome material determine cost, lifespan and temperature range. Shanyo grades every custom dome sheet array into three tiers - economical (PET + 304 stainless steel), balanced (PEN + 301 stainless steel) and flagship (PI + beryllium-copper). Use this comparison to match the tier to your product's price point and reliability target:
| Specification | Eco Tier (PET) | Balanced Tier (PEN) | Flagship Tier (PI) |
|---|---|---|---|
| Actuation force | 10–200 gf | 10–200 gf | 5–500 gf customizable |
| Travel | 0.05–0.5 mm | 0.05–0.5 mm | 0.02–1.0 mm |
| Contact resistance | <100 mΩ | <100 mΩ | <50 mΩ |
| Life cycles | ≥500,000 | ≥1,000,000 | ≥5,000,000 |
| Operating temperature | -40°C to +85°C | -40°C to +85°C | -55°C to +125°C |
| Typical thickness | Standard | Standard | Ultra-thin <0.3 mm available |
| Best fit | Remote controls, calculators | Automotive HMIs, industrial panels | Medical, automotive, IP67/IP68 outdoor |
Application-specific options buyers usually ask about
Remote controls and set-top boxes: a custom remote control dome sheet cut to your exact button matrix, typically the economical PET tier.
Medical devices: ISO 13485-certified medical button dome arrays with gold-plated domes for low contact resistance.
Automotive interiors: bend-insulated car dome sheet arrays validated to -40°C and supplied with IATF 16949 PPAP documentation.
Wearables and sports watches: ultra-thin PI arrays under 0.3 mm, as used in our sports watch dome sheet arrays.
MOQ, Lead Time and Sampling: What to Expect From a Factory-Direct Supplier
Procurement teams evaluating a dome array manufacturer should confirm these commercial terms early in the RFQ:
MOQ: Shanyo supports small-batch prototyping for design validation and scales to mass production of 60M+ pieces annually, so one supplier covers the full product lifecycle.
Samples: free samples of standard constructions are available; custom-tooled layouts are sampled in 5–7 days using in-house mold-making.
Lead time: standard lead times apply after layout drawing approval; multi-site manufacturing in China and Vietnam keeps bulk-order supply stable.
Quality evidence: every sheet passes 100% CCD inspection for dome position, adhesive integrity and electrical continuity; material certificates and force-curve reports are available on request.
Engineering tip: before releasing your RFQ, prepare your keypad layout drawing (DXF or PDF), target actuation force per key, and operating environment. If you are unsure how dome geometry affects click feel, read our metal dome selection guide on SUS301 force curves and click ratio first - force tolerance and click ratio are specified at the dome level and then carried into the array.
How to Get a Factory-Direct Quote for Custom Dome Sheet Arrays
Sourcing directly from the factory eliminates distributor markups and shortens the design-iteration loop. Shanyo has manufactured precision metal domes and dome arrays in Qingdao since 2004 under ISO 9001, ISO 14001, ISO 45001 and IATF 16949 certification. Send us your layout drawing and requirements, and our engineers will recommend the right substrate tier, dome geometry and adhesive system - with free samples and factory-direct pricing for qualified B2B projects.
Browse more tactile switch components in our full product catalog, or see where our arrays are used across industries and applications.
