1.Main Material and Technical Specifications:
|Overlay Material:||PET: Auto-type|
Autotex F150, F200, F280, V150, V200, V280, XEV150, XEF200
Autoflex EBG130, EBG180, EBG250, EBA130, EBA130, EBA250
Autostat CT3, CT4, CT5, CT7
PC: GE LEXAN-8010 8B35 8B35F HP92S HP40 FR700 FR60
|Spacer:||Double side adhesive tape: 3M, TESA, SEKISUI, Domestic adhesive tape|
|Back Adhesive:||3M (mainly), Others|
|Solver Paste:||CHANGSUNG: CSP-3136, CSP-5150;|
ACHESON: DE 725A (6S-61), ED 427SS, ED979SS, ED976SS, HV;
FUJIKURA AND OTTI
|Oil Ink:||SEIKO, JUJO, DUBUIT, PROELL, NORCOTE UV|
|Carbon Paste:||FUJIKURA, ACHESON ED581SS, OTTI|
|6 Layers Poly dome Type Membrane Switch Structure||Overlay + Spacer + Dome Retainer + Spacer + Circuit Layer + Back Adhesive|
|4 Layers Poly dome Type Membrane Switch Structure||Overlay + Spacer + Circuit + Back Adhesive|
|Contact Resistance||0.5-10 Ω|
|Insulation resistance||≥10 MΩ|
|Base Material Voltage Durable||2000 V DC|
|Bounce Time||≤ 5 ms|
|Working Current||≤100 MA|
|Working Voltage||≤ 50 V DC|
|Life||≥ 1,000,000 times|
|Key Travel||Flat type: 0.05mm-0.5mm, Tactile Type: 0.1-1.5mm|
|Working Temperature||-40 ºC - +80 ºC|
|Actuation Force||20-550 g|
|Storage Condition||Temperature: -40 ºC - +85 ºC, Humidity: ≤98% RH|
|PET Circuit Tail Flexible Feature||180° to any angle|
What is a "Membrane Switch"?
A membrane switch is a printed electronic circuit that uses pressure to open and close a circuit. The membrane switch circuitry is most often screen printed using conductive inks, which are typically made of silver, carbon, and/or graphite.
Membrane switches are part of a range of devices considered to be user interfaces (also called operator interfaces, or man-machine interfaces) along with display-based touch screens, and mechanical switches such as push-button, toggle, rocker, and slide switches. The ultimate purpose of a membrane switch is to serve as the interface between man and machine, enabling an operator to communicate with a piece of equipment, instrument, or machinery.
Features & benefits of membrane switches include:
Completely sealed surface - easily cleaned and sterilized.
Low Profile - no crevices that can trap contaminants.
A cost-effective alternative - less costly than rubber keypad assemblies and capacitive touch keypads.
Thin profile - saves valuable space in your product design.
Easy to interface with existing controllers - no special electronics required, as with touch screens.
Versatile graphic interface - overlays can be screen or digitally printed with stunning, photo-quality graphic effects.
Protection by design - Easier to protect from UV radiation than rubber keypads.
Water-resistant designs - meets NEMA 4 and IP 67 specifications.
How Are Membrane Switches Constructed?
Membrane switches are essentially a sandwich of thin layers that are bonded together using pressure sensitive adhesives. Depending on the application requirements, a membrane switch will consist of as few as 4, and as many as 9 layers. In contrast to mechanical switches, membrane switches offer the advantage of lower cost, they consume less design space with their low profile, are easy to clean, and they offer a sleeker, ergonomic, and aesthetically pleasing appearance.
The visible top layer of a membrane switch is the graphic overlay, with printed circuitry underneath the overlay. The circuitry can also incorporate different layers such as polyester (silver flex), polyimide (copper flex), and rigid PCB layers. Activation of a switch occurs when a printed shorting pad or metal dome makes contact with the bottom circuit layer thus, closing the circuit.
What Industries Use Membrane Switches?
Membrane switches can be found in a variety of different industries. Medical instrumentation and laboratory equipment are ideal markets for membrane switches. These switches can be designed to be sealed from moisture and contaminants and with anti-microbial coatings to resist bacterial growth and harsh chemicals. Membrane switches are also utilized in industries such as electronic test and telecommunication networking equipment. Industrial controls and fitness equipment are also industries where membrane switches are the user interface of choice.
3. About Us
Shanghai Hombo Industrial Co., Ltd.
With ten years' experience of design and manufacturing in Membrane Switches and special printing product for electrical appliance industry, our Products are popularly used in household appliance, medical equipment, industrial control, telecommunication equipment, electronic instruments, intelligent toy and automotive industry. we are grateful for our work with more than 100 regular customers all over the world, it is their trust encourage us to assist our customers with better solutions.
4. Contact Us
Mr. Chris Wang Foreign Trade supervisor
Mobile: +86 18516744561
Shanghai Hombo Industrial Co., Ltd.
Add: 9th Floor, No.35, Lane 800, Meijiabang Rord, Songjiang District,
Shanghai 201600, China
Tel: +86 21 57791111 Fax: +86 21 67898089