OEM/ODM Flexible Circuit Membrane Switch Factories & Supplier

To provide an accurate Design For Manufacturability (DFM) review and tier-discounted unit pricing, our engineering department requires:

• Vector Graphic Overlay Files: Adobe Illustrator (.AI), vector PDF, or CorelDraw, with specified Pantone/RAL color codes, display window tolerances, and dead-front requirements.
• Mechanical Layer Stack-up: 2D mechanical CAD drawings (DXF/DWG) detailing overall dimensions, cutout locations, embossing profiles, adhesive borders, and tail exit coordinates.
• Circuit Schematic: Netlist, pinout wiring diagram, tail connector pitch (e.g., 2.54 mm, 1.0 mm, or 0.5 mm ZIF), and contact resistance limitations.
• Environmental Profile: Temperature ranges, UV exposure expectations, cleaning agent exposures, and required IP ratings (IP65, IP67).

While Polycarbonate (PC) is cost-effective, easy to emboss, and simple to die-cut, it is susceptible to micro-cracking and solvent breakdown under constant flexing. Polyethylene Terephthalate (PET), particularly premium biaxially oriented substrates like MacDermid Autotype, provides over 5,000,000 actuation flex cycles without fatigue. PET also offers superior chemical resistance to aggressive industrial degreasers, sanitizers, and fuels, making it the preferred standard for harsh medical, food processing, and petroleum interface equipment.

Silver migration occurs when an electric potential drives silver ions through moisture across closely spaced conductive traces. To prevent this, Cevra implements three safeguards:

1. Applying a pinhole-free, UV-curable carbon or polymer thick-film dielectric over-coat to isolate the silver conductors.
2. Maintaining minimum trace spacing (typically ≥ 0.5 mm) on high-potential lines.
3. Using complete perimeter sealing with cross-linked acrylic 3M 200MP/300LSE adhesive layers and integrated desiccant breathing channels that block ambient moisture ingress.

Our standard 4-leg cross and round snap domes are fabricated from tempered SUS301 stainless steel. Unplated or nickel-plated domes provide low contact resistance and solid oxidation resistance across typical consumer and industrial settings. For low-current logic applications (< 1 mA) or extreme duty-cycle equipment operating in high-vibration, corrosive, or salt-fog environments, we recommend selective gold plating. Gold plating prevents micro-fretting corrosion, preserves contact reliability, and stabilizes loop resistance below 1 Ω over millions of cycles.

We operate separate rapid-prototyping cells and automated mass-production lines. For engineering prototypes and early testing runs (10–100 pieces), we use high-speed digital plotting and precision flatbed laser cutting, bypassing hard steel die costs and accelerating sample lead times to 5–7 working days. Once the design is validated, we transition to Class-A matched steel stamping dies and automated screen printing to deliver high-volume efficiency and competitive unit economics.