Precision HMI & Dome Array Product Showcase
Explore our core OEM/ODM human-machine interface assemblies, tactile snap arrays, and specialized industrial membrane keypads manufactured to micron tolerances.
Custom Standard Good Price 3X3 4X5 Matrix Membrane Switch Keypad Keyboard Panel for Fuel Dispenser
High-durability matrix layout with fuel-vapor proof chemical sealing and tactile feedback for outdoor stations.
Membrane Keypad With Light Guide Film Metal Dome Array Sheet PCB Switch Button
Integrates low-profile LGF optical backlighting with pre-indexed tactile domes for balanced luminance.
Single Layer SUS301 Stainless Steel Metal Dome Array for Earphone Mobile Phone Keypad Remote Control Switch
High-grade Japanese SUS301 spring steel ensuring crisp acoustic feedback and over 1,000,000 actuations.
OEM/ODM Factory Direct Sales Round Metal Snap Dome Sheet with Adhesive Tape Copper Foil Metal Dome Array
Self-adhesive carrier sheet backed with conductive copper foil for enhanced EMI shielding and fast PCB assembly.
Double-sided SUS301 Stainless Steel Dome Array EMI Metal Dome Array
Engineered with dual-sided shielding substrates to prevent electromagnetic interference in critical industrial controllers.
Waterproof Single Layer SUS301 Stainless Steel Dome Array Remote Control Metal Dome Array
Hydrophobic perimeter ring seals out moisture, condensation, and chemical washdowns for remote consoles.
Double-sided Tape Single Layer SUS301 Stainless Steel Dome Array Remote Control Metal Dome Array
Features genuine 3M high-performance pressure-sensitive tape layers for permanent substrate adhesion.
Customized Metal Dome Array
Engineered to custom pitch, custom trip force (160g–500g), and custom key layout to fit complex European housings.
Electroluminescent (EL) Membrane Switch Integration & Physics
An in-depth engineering assessment of phosphor-based field luminescence, multilayer cross-sections, and driver matching for mission-critical Zagreb hardware deployments.
Phosphor Matrix & Excitation
Electroluminescent backlighting operates on solid-state field emission. Microencapsulated zinc sulfide (ZnS:Cu) doped crystals are suspended in a high dielectric medium between two planar electrodes—a translucent front Indium Tin Oxide (ITO) conductor and a rear conductive carbon or silver ground.
- AC Inverter Voltage: 60V–115V RMS
- Operating Frequency: 400Hz to 1.2kHz
- Zero hotspotting: 100% surface uniformity
Micro-Profile Layer Stack-Up
Unlike edge-lit LEDs or thick acrylic light guides requiring 1.5mm–3.0mm cavity depths, an EL lamp adds only 0.20mm to 0.28mm to the overall switch thickness. This ultra-flat profile preserves tactile snap ratio and eliminates mechanical pre-travel degradation across millions of actuations.
- Total Stack Height: 0.65mm – 1.10mm
- Substrate: Optical Grade Melinex / Autotype PET
- Embossing: Rim, Pillow, or Polydome styling
Harsh Industrial Sealing
Cevra's vacuum laminating technology envelopes the EL phosphor layer within high-barrier moisture barriers, preventing environmental moisture hydrolysis. When combined with perimeter hydrophobic adhesives (3M 200MP / 300LSE), the complete assembly reaches true IP65/IP67 ingress ratings.
- Thermal Tolerance: -40°C to +85°C continuous
- Chemical Ingress: Hydrocarbon & Alcohol resistant
- EMI/ESD: Optional grounding layer to 15kV ESD
| Evaluation Parameter | Electroluminescent (EL) Membrane Switch | Discrete Surface-Mount LED Backlit | Light Guide Film (LGF) + Side-Fire LEDs |
|---|---|---|---|
| Illumination Profile Uniformity | 100% Homogeneous across complex legends | Prone to pinpoint hot-spots and shadow rings | High uniformity, slight attenuation over long runs |
| Added Assembly Thickness | 0.20 mm – 0.28 mm | 0.80 mm – 1.80 mm (requires spacer cavities) | 0.30 mm – 0.50 mm |
| Tactile Travel Distortion | Zero tactile feedback dampening | Noticeable stiffness without silicone damping | Negligible tactile dampening |
| Current Consumption & Heat | Ultra-low current (cold source, zero heat) | Moderate to high; creates localized heat spots | Low heat generation, limited by LED drive currents |
| Drive Circuitry Needed | Dedicated compact AC Inverter (IC or module) | Direct DC current limiting resistors | Direct DC current limiting resistors |
| Night-Vision / NVG Compatibility | Superior green/blue-green narrow emission bands | Requires costly optical diffusion filtering | Acceptable with specific tinted optical filters |
Zagreb Regional Ecosystem & Localization Applications
How Cevra's custom OEM/ODM EL membrane switch assemblies directly fulfill the design, regulatory, and mechanical criteria of manufacturing hubs across Zagreb and Central Croatia.
Electrical Distribution & Substations
The prominent electrical engineering cluster centered around Zagreb (notably Končar and associated regional telemetry builders) demands HMI consoles capable of 24/7 dark-control-room legibility. EL backlit membrane switches provide uniform, non-distracting luminescent legends for medium/high-voltage switchgear interfaces that must operate without thermal degradation inside sealed IP65 metal enclosures.
Medical & Biomedical Devices
Zagreb is Croatia's center for medical technology, clinical laboratories, and healthcare equipment manufacturing. Our EL switch panels incorporate non-porous Autotype polyester graphic skins that resist hospital-grade chemical sterilizers, quaternary ammonium solutions, and isopropyl alcohol, while eliminating physical key crevices where bacteria can harbor.
Electric Mobility & Automotive Tech
The high-tech corridor extending from Sveta Nedelja through Sesvete houses globally renowned electric hypercar, battery, and powertrain developers. For secondary dash clusters, battery telemetry modules, and charging terminal pillars, EL membrane switches provide ultra-slim form factors that easily fit within tight automotive space envelopes.
Adriatic Maritime & Defense Consoles
Zagreb system integrators delivering marine electronics, naval communications, and navigation gear for Adriatic shipyards require panels certified for night navigation. EL lighting naturally emits green and blue-green wavelengths that preserve dark adaptation for maritime bridge officers and can be customized for military-grade NVG (Night Vision Goggle) compatibility.
Food Processing & Industrial Packaging
Zagreb's peri-urban industrial belts (Jankomir, Sesvete, Velika Gorica) feature intensive food production and automated bottling infrastructure. High-pressure washdowns (IP66/IP67) and cyclic thermal shifts quickly degrade standard mechanical pushbuttons; Cevra's completely sealed EL keypads guarantee continuous operability under damp, chemical-intensive wash environments.
Smart Energy Metering & HVAC
In municipal telemetry, district heating panels, and industrial HVAC monitoring across Croatia, technicians service units in poorly lit boiler rooms or outdoor kiosks. An integrated EL lamp switch allows instant low-power panel legibility at the touch of a wake-up key without running power-hungry auxiliary display bulbs.
Zagreb Market Trends in Custom HMI Sourcing
Examining how Croatian equipment makers navigate European Union directives, lead times, and factory-direct engineering collaborations.
EU RoHS 3, REACH & Material Compliance
Procurement teams across Zagreb are legally bound by strict EU environmental legislation (Directive 2011/65/EU and Regulation (EC) No 1907/2006). Cevra provides complete full-material disclosure declarations, certified RoHS 3 test sheets, and halogen-free substrate options. Our silver inks, UV screen printing varnishes, and 3M adhesive tapes are verified free of prohibited phthalates and lead compounds, ensuring hassle-free CE marking for exports across the European Single Market.
Direct Factory Sourcing vs. Intermediary Trading Desks
Historically, Croatian engineers purchased membrane switches through European distributors, incurring 40%–60% price markups and 6-week communication delays for simple artwork or pinout revisions. By collaborating directly with Dongguan Cevra Electronic Technology Co., Ltd., Zagreb R&D teams communicate straight with factory DFM engineers, receive CAD/Gerber reviews in 24 hours, and acquire golden prototype samples within 7–10 working days.
Transition from Pure Mechanical to Hybrid Capacitive / EL
Croatian OEMs are blending the mechanical dependability of stainless steel snap domes with modern capacitive touch sensing and electroluminescent lighting. Cevra manufactures hybrid multi-layer switches that combine tactile emergency shutdown buttons with sleek capacitive scroll sliders and EL-illuminated status arrays on a unified FPC or PET circuit.
Multimodal Freight Resilience into Zagreb
Following recent global logistic realignments, Croatian procurement managers balance inventory costs through hybrid logistics. High-value pilot and fast-turn custom membrane switch runs travel via air courier directly into Franjo Tuđman Airport Zagreb (ZAG) in 3 to 5 business days, while volume sea shipments dock seamlessly at Port of Rijeka or Port of Koper with fast road transit across the A1/A6 corridor.
Dongguan Cevra: 16+ Years of In-House Precision Engineering
Operating under strict ISO 9001 quality management with independent onsite SGS Group verification, we provide complete vertically integrated manufacturing under one roof.
Established March 2009
Over 16 years of continuous specialization dedicated exclusively to custom membrane keypads, metal domes, graphic overlays, and light guide assemblies.
SGS Onsite Audited Facility
Our production premises, testing labs, cleanrooms, and engineering departments are independently audited and confirmed by SGS Group for international buyer peace of mind.
2,600㎡ Dedicated Workshop
In-house semi-automatic and fully automatic screen printing lines, precision laser cutting, CCD camera automated drilling, and cleanroom lamination chambers.
Rigorous In-House Quality Lab
Equipped with specialized Dome Load Testers (force-displacement curves), High & Low Temperature Test Cabinets, Adhesive Holding Tack Testers, and Electric Pencil Hardness Testers.
Flexible Prototyping to Mass Production
Rapid pilot tooling for Zagreb product launches with prototype batches from 10 to 100 units, scaling seamlessly to monthly production runs of 500,000+ pieces.
Full OEM/ODM Engineering Service
Direct assistance on connector pitch selection (1.0mm, 2.54mm, Amphenol/FCI, ZIF), tactile trip force optimization, embossing profiles, and customized EL inverter drivers.
Comprehensive In-House Reliability Testing Protocols
Every custom membrane switch batch destined for the European market undergoes stringent testing to ensure it meets our verified specifications:
Request an Engineering DFM Review for Your Zagreb Project
Upload your CAD, DXF, or AI drawing files. Our technical engineers provide a free Design For Manufacturability (DFM) assessment, custom layer stack-up recommendation, and an itemized factory quotation within 24 hours.
Frequently Asked Questions by Zagreb Hardware Engineers
Clear, direct answers regarding custom tooling, backlighting inverters, minimum order quantities, and European shipping protocols.
How does an EL (Electroluminescent) membrane switch differ mechanically from an LED backlit switch?
An Electroluminescent (EL) membrane switch utilizes a thin, printable phosphor dielectric layer (0.2mm to 0.28mm total thickness) that emits cold, perfectly uniform light across broad surfaces without any localized hot-spots. By contrast, LED-backlit switches require either discrete surface-mount LEDs nested within thick spacer cavities or a Light Guide Film (LGF) with side-firing LEDs. This makes EL backlighting substantially thinner, preserving the natural tactile snap of underlying metal domes and preventing the key stiffness or tall profile typical of traditional LED arrays.
What power supply and driver inverter does an EL membrane keypad require?
EL lamps operate on alternating current (AC), typically requiring an input between 60V and 115V RMS at a frequency of 400Hz to 1,000Hz. For modern 3.3V, 5V, 12V, or 24V DC industrial circuits common in Zagreb automation and medical devices, a tiny, dedicated DC-to-AC driver IC (such as Durell or Supertex/Microchip solutions) or a modular encapsulated inverter is integrated either directly onto the client's mother PCB or supplied as a matched external daughterboard by Cevra.
Can you provide full compliance documentation for EU CE, RoHS 3, and REACH regulations?
Yes. Every batch of custom membrane keypads, graphic overlays, and metal dome sheets manufactured at Cevra complies with EU Directive 2011/65/EU (RoHS 3) and Regulation (EC) No 1907/2006 (REACH). We supply formal third-party test reports and Certificates of Conformity (CoC) verified through our ISO 9001 quality system and independent SGS audit data, enabling smooth CE marking for your finished devices.
What design files and technical parameters are required to commence a custom OEM/ODM quote?
To initiate a comprehensive engineering review, please provide: (1) Vector artwork in Adobe Illustrator (.AI), PDF, CorelDraw, or CAD (.DWG/.DXF) showing graphic dimensions, window cutouts, and key positions; (2) Circuit schematic or pinout definition with preferred tail pitch (1.0mm, 1.27mm, or 2.54mm); (3) Tactile specifications, such as desired snap dome diameter and actuation force (e.g., 280g 4-leg cross dome); and (4) Operating environmental conditions (e.g., outdoor UV exposure, chemical wipe downs, or IP67 sealing requirements).
What are the Minimum Order Quantities (MOQ) and lead times for Croatian enterprises?
Cevra supports engineers through the entire product development lifecycle. Prototype evaluation quantities start at just 10 to 50 pieces, while standard custom production batches typically start at 100 to 500 units. Prototyping lead times range between 7 and 10 working days following final DFM artwork sign-off. Mass production runs are typically completed in 15 to 20 working days, with expedited express air freight reaching Zagreb within 3 to 5 business days via DHL, FedEx, or UPS.
How do your tactile metal dome arrays ensure reliable performance in industrial machinery?
Our tactile dome arrays are fabricated using authentic Japanese SUS301 stainless steel with precision stamping dies. Every lot is verified on our automated dome load tester to guarantee a sharp snap ratio (tactile sensation) and consistent return force. Domes are pre-assembled on pressure-sensitive acrylic carrier sheets with integral vent channels that equalize air pressure during rapid pressing, preventing dome collapse and guaranteeing a functional lifespan exceeding 1,000,000 cycles.
Can Cevra provide customized ESD/EMI shielding layers for sensitive European instrumentation?
Yes. We integrate printed conductive silver grid patterns, solid carbon layers, or laminated aluminum/copper foils directly beneath the graphic overlay. These shielding layers are terminated to a dedicated ground pin on the tail connector, effectively shielding sensitive digital circuitry from static discharges up to 15kV ESD and blocking high-frequency electromagnetic interference (EMI/RFI) common in substation and factory environments.
The 7-Stage Precision Manufacturing Workflow
From initial Gerber/CAD file verification to anti-static export crating, discover how every layer is fabricated within our Dongguan facility.
Engineering DFM
Detailed review of trace line-width, clearance, dome spacing, tail pitch, and layer stack-up tolerances.
Precision Screen Print
High-mesh silk-screening of reverse-side graphics, conductive silver traces, carbon contacts, and EL phosphor inks.
Tunnel Oven Curing
Controlled infrared baking stabilizing resistance values below 1.0 Ω/cm and preventing silver migration.
Laser & Die Punching
CCD optical positioning guides precision punching of spacer cavities, vent channels, and outer perimeter borders.
Automated Assembly
Cleanroom pick-and-place indexing of SUS301 stainless steel domes and multi-layer roll lamination under vacuum.
Automated Testing
100% automated continuity, loop resistance, insulation resistance, and tactile force actuation verification.
ESD Export Packaging
Anti-static moisture barrier bagging, reinforced edge guards, and shock-absorbent carton packing for international transit.
Zagreb Door-to-Door
Full customs clearance and express DDP logistics direct to your factory warehouse in Zagreb, Sesvete, or Jankomir.
Accelerate Your Product Development with Cevra
Whether you require high-luminance EL membrane switches for medical diagnostic consoles, chemical-resistant fuel dispenser keypads, or waterproof tactile snap dome arrays, Dongguan Cevra Electronic Technology Co., Ltd. is your trusted manufacturing partner for the Zagreb market. Experience transparent pricing, verified ISO 9001/SGS quality, and prompt engineering support.