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About Luphi

Membrane Switches

As a leading membrane switch manufacturer in China, Luphi Electronics specializes in custom membrane switches and membrane keypads designed to meet a wide range of industry requirements. We bring together quality materials, innovative engineering, and extensive industry experience to deliver high-performance membrane switches that excel in both reliability and durability. Whether you need a standard membrane keypad or a fully customized design, our end-to-end services ensure the perfect solution for your application.

What is Membrane Switch?

A membrane switch is a user interface component that integrates key functions, indicators, and control panels into a single, low-profile assembly. It typically consists of six main layers:

  1. Graphic Overlay (Panel) – The visible interface with printed icons, text, or symbols.
  2. Spacer – Separates circuit layers and defines tactile response.
  3. Tactile Layer – Includes metal domes or tactile features that provide feedback when pressed.
  4. Circuit Layer – Conductive elements (printed PET circuits, PCB, or FPC) that transmit signals.
  5. Bottom Circuit/Substrate – The stable base holding the conductive traces.
  6. Adhesive Backing – Secures the switch assembly to the end product.

When a user presses a key, the tactile layer contacts the underlying conductive pads, closing the circuit and sending an input signal. Once released, the dome returns to its original shape, breaking the circuit. These switches are valued for their sealing properties, moisture resistance, easy cleaning, high integration, and long lifespan. Industries such as electronic communication, industrial control, medical devices, automotive, rail transportation, household appliances, aerospace, and military equipment commonly utilize membrane switches for their robust performance and reliability.

Graphic Overlay: The Face of the Membrane Switch

Graphic overlays form the user-facing surface of a membrane switch and must meet stringent quality standards. Clear and accurate printing, legible characters, precise color matching, and excellent durability are essential. For applications exposed to outdoor conditions, UV-resistant overlays are crucial.
 
At Luphi Electronics, we source top-quality PET and PC materials, including Autotex F, Autotex V, AutoFlex EBG/EBA, and the Autotex XE series. For PC materials, we rely on SABIC’s proven reliability. These choices ensure the overlay layer can withstand rigorous use, maintain visual clarity, and enhance user satisfaction.

Circuit Layer: The Core of the Membrane Switch

If the overlay is the face of the switch, the circuit is its soul. Circuit quality directly impacts functionality and reliability. We offer three main circuit types to suit different applications and budgets:
  • PET Circuits: Cost-effective, commonly used in standard membrane keypad solutions.
  • PCB Circuits: Offer higher stability and are suitable for complex or high-precision requirements.
  • FPC Circuits: Provide enhanced durability, flexibility, and weather resistance, ideal for demanding applications.

 

Not sure which circuit type you need? Our experienced engineering team will analyze your requirements and recommend the most suitable and cost-effective solutio

 

Internal Components of a Membrane Switch

Most custom membrane switches integrate simple yet essential components for functionality and user feedback:

  • Metal Domes: Provide tactile feedback.
  • LED Lights: Offer backlighting and status indication.
  • Connectors, Resistors, and Capacitors: Enhance functionality and integrate seamlessly with your device’s main control board.

For more complex needs, including PCBA-based membrane switches, we can incorporate advanced electronic components. We use premium parts from trusted brands like Nicomatic, Kingbright, Everlight, Liteon, Memcon, and Truetone to ensure quality from the start.

Why Choose Luphi Electronics as Your Membrane Switch Supplier?

Choosing the right membrane switch supplier involves considering not just their price level but also their qualifications,

 industry experience, and after-sales service policies. So, what are the advantages of Luphi Electronics?

10+ Years of Customization Experience for European and American Clients

Covering industries such as industrial control, instrumentation, household appliances, network communications, machinery, medical health, and more.
 

Strong Manufacturing Capability

With a factory covering 4,500 square meters and an annual output of over 5 million sets, equipped with advanced automated printing production lines and various other automated equipment, along with skilled technicians.

Robust Engineering Team

Luphi Electronics’ hardware and software engineers each have over 10 years of industry experience, providing customers with comprehensive custom solutions and optimization suggestions for their designs.
 

Reliable Quality Assurance

All Luphi-manufactured membrane switches undergo 100% appearance inspection and at least two complete functional tests of the circuit. Additionally, Luphi Electronics has its internal reliability laboratory to conduct various tests, ensuring product quality meets design specifications.
 

Responsible After-Sales Service

While many suppliers claim to offer after-sales service, customers often complain about them shirking responsibility when issues arise. At Luphi Electronics, our principle is to analyze the cause immediately and arrange replacement to ensure the continuity of the customer's production line. Even if the issue is not due to Luphi’s quality, we also prioritize replacement to meet the needs of our customers' production lines.

A Custome​​​​​​​r’s Words Mean More Than Ours


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Tel: +86-134-3741-0111
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