High-Reliability Flexible HMI Assemblies
TAVO Electronic Information Technology Co., Ltd. was founded in 1990, specializing in the research, engineering, and manufacturing of membrane switches, membrane keypads, and graphic overlays. Over more than three decades of focused development, flexible printed circuit (FPC) membrane switches, LED-integrated keypads, and membrane assemblies with structural liners have become our benchmark product lines.
Our human-machine interface assemblies are engineered to perform reliably across demanding industrial controls, household appliances, medical diagnostics, rail transit, and precision apparatus. We operate under a customer-centered principle focusing on integrity, high build quality, agile production speed, and competitive value. Every phase of production is maintained strictly in accordance with the ISO 9001 quality management system.
Through sustained technical expansion and equipment modernization, our products have earned long-term recognition in the international marketplace. With nearly ten years of technical cooperation and delivery history serving OEM clients in the United States, Germany, and across Europe, our switches have been deployed in national rail transit locomotive controls, the Three Gorges hydro engineering project, the aerospace sector, and various state-level infrastructure systems.
From Concept Drawing to Series Production
Our dedicated engineering team reviews design for manufacturing (DFM), converts complex CAD files, and optimizes traces for flexible copper circuits and overlay layouts.
Drawing Design & Layout Engineering
Our engineers review customer mechanical drawings (DXF, DWG, STEP) to establish trace geometry, dome actuation pitch, backlighting channels, and tail routing.
CAM Workstations & Digital File Conversion
Specialized CAM software converts graphics and film designs into multi-layer screen meshes and high-speed CNC cutting paths with strict tolerance controls.
Substrates & Layers
- Polyimide (PI) copper flex circuits
- Autotype polyester (PET)
- Polycarbonate (PC) front overlays
- Conductive silver and carbon inks
Tactile Feedback
- Stainless steel metal domes (120g-500g)
- Polydome formed PET keys
- Pillow and rim key embossing
- Light guide film (LGF) tactile mix
Sealing & Bonding
- Genuine 3M adhesive backings
- IP65 to IP67 environmental sealing
- Chemical and solvent resistant faces
- Wipe-clean medical grade surfaces
Tail & Connection
- Zero Insertion Force (ZIF) flex tails
- Standard pitch female housings
- Gold or tin plated contact fingers
- FR4/Polyimide tail stiffeners
Rigorous Environmental & Durability Testing
Field reliability is designed in and verified before shipment through our dedicated in-house environmental test units and automated inspection equipment.
Computer Tester
Conducts 100% automated electrical checks across every switch assembly, validating contact resistance, loop continuity, and open/short insulation integrity.
Button Life Cycle Test Unit
Repetitive mechanical actuations to measure tactile retention, travel consistency, and switch longevity beyond 1,000,000 cycles under simulated use conditions.
Humid & Temp Programmable Tester
Executes thermal cycling from -40°C to +85°C with controlled relative humidity up to 95% to verify bond stability and ink layer adhesion without delamination.
Xenon Lamp Aging Chamber
Simulates aggressive solar spectrum and UV radiation exposure to confirm graphic overlay color fastness, anti-yellowing, and long-term legibility.
Auto Salt Fog Chamber
Corrosion resistance testing for outdoor marine and aggressive industrial environments, preventing connector degradation and perimeter seal breach.
Optical Alignment & Gauging
Precision measurement systems ensure overlay cut line registration, dome center positioning, and window clarity stay within strict engineering tolerances.
Custom FPC Keypad & Keyboard Configurations
Explore standard and custom configurations manufactured to your precise physical and electrical specifications.
Environmentally Sealed FPC Membrane Keypad IP65
3M adhesive backer, silver ink circuitry on PET/FPC substrate, tactile metal dome array.
Flexible Copper FPC Circuit Membrane Switch
High-density polyimide flexible traces with surface-mount LED integration and fine pitch tails.
Custom Graphic Overlay Membrane Keyboard
PET/PC textured front surface with transparent display windows and custom embossment.
Waterproof Industrial Control Membrane Keyboard
Engineered for harsh operating conditions, machinery panels, and external controllers.
Custom Cable & Termination Membrane Keypad
ZIF connectors, custom pitch flex cables, and reinforced insertion ends for secure assembly.
Multi-Layer Sealed Membrane Switch Keypad
Integrated venting channels, moisture barrier seal, and long life tactile snap action.
IP67 Acrylic Metal Dome LCD Membrane Switch
Rigid backer plate with integrated display cutouts and high environmental protection.
Flat Non-Tactile Panel Mount Keypad Switch
Low profile, wipe-clean cleanroom and medical grade interface with high chemical resistance.