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#1 2020-09-09 12:43:02

MargartWbi
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From: Italy, Valdieri
Registered: 2020-09-09
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Posted on Thursday January 01, 1970


Posted on Thursday January 01, 1970


Posted on Thursday January 01, 1970


Posted on Thursday January 01, 1970


Posted on Thursday January 01, 1970


Posted on Thursday January 01, 1970


Posted on Thursday January 01, 1970


Posted on Thursday January 01, 1970

Membrane Switch Manufacturer & Keypad Design

Quality membrane switches and keypads for a variety of industries including home healthcare,  gas-detection equipment and industrial controls.
Membrane Switches & Keypads.
Butler Technologies Inc.
is committed to delivering the highest-quality membrane switches on the market.
If your company requires a custom-designed membrane switch, whether as a standalone product or part of a larger concept, BTI has a solution for you.
If you would like to learn more about our collaborative design process, rigorous quality standards, and competitive pricing, give us a call today.
We produce quality membrane switches and keypads for a variety of industries including home healthcare, gas-detection equipment, and industrial controls.
What is a Membrane Switch.
A membrane switch is an electrical control for turning a circuit on and off.  Membrane switches are more cost-effective and take up less design space than mechanical switches or buttons because of their low profile.
Membrane switches are easy to clean which makes them ideal for Medical or industrial controls.
You may have held a dozen membrane switches and not even known it.
A tiny, slim-profile plastic remote controller, keypad, or touchpad with buttons consisting of raised impressions in a sealed outer layer is almost certainly a membrane switch.
They are convenient, inexpensive, and highly portable because membrane switches are so thin that it can be hard to imagine a device of any consequence built into such a slender chassis.
This is possible because a membrane switch (also known as a touch switch or membrane keypad) is constructed from flexible layers or “membranes” – thin like the skin of an egg yolk but made of polyester – sandwiched together like stacked sheets of paper.
These layers can interact with each other when stimulated from the top down.
The flexible, pressure-sensitive membranes have a circuit “printed” upon them with conductive ink.
Common materials for this ink include copper, silver, or graphite.
The circuit can then be actuated by pressure from the upper layer, printed with ink to indicate where to touch.
The interacting layers are sealed together with adhesive to create a self-contained, low-voltage circuit in a tiny package.

Membrane switches are considered “momentary action” switches
This basically means that they are always “open.” By pressing a button on the outer layer

the printed circuitry is then momentarily “closed.” This closing triggers the action or function of the membrane switch.
Compare this to a mechanical switch.
The same function can usually be achieved with a traditional toggle switch but constructed from bulky metal or plastic parts.
Numerous functions of a touchscreen can be fulfilled by a membrane switch, but with far less circuitry and voltage requirements.
For many applications, membrane switches are a giant leap forward.

Components of a Membrane Switch

A typical membrane switch consists of the following components:  Graphic Overlay – This is the layer that the user sees.
Made of polyester or polycarbonate, it can be screen printed or digitally printed to your specifications to tell users how and where to press.
The overlay typically will have letters, symbols, and icons printed on to indicate where to press.
Embossed domes may be designed under the icons for a more intuitive button interface.

Overlay Adhesive – Usually made from a pressure sensitive adhesive

this layer binds the graphic overlay to the next layer.
Dome Retainer / Upper Circuit Layer – This is one of two potential membranes with conductive and dielectric circuitry printed onto it with metal or carbon-based inks.
Not all switches contain a top circuit layer.
Tactile switches will typically use a dome retainer in place of this layer.

Spacing Layer – A spacer keeps the upper and lower circuit layers from touching

When a button designated from the graphic overlay is pressed from the outside, the spacing layer compresses, allowing the circuit layers to touch and create a “closed” circuit.  Within this layer is where etched light guides or LFG (Light Guide Film) is placed to direct light to the appropriate icons.

Lower Circuit Layer – This membrane is printed with circuitry

A closed loop is created when it connects with the upper circuit layer or the dome switch due to pressure from the outside.
This closed loop causes actuation of the desired switching effect.
Back Adhesive Layer – This second layer of acrylic adhesive binds the membrane switch assembly to the product enclosure.
Rigid Support Layer – This backmost layer offers support for free-standing membrane assemblies.
A membrane keypad integrated into a larger product may not need this layer.
We at Butler Technologies Inc.
hold ourselves to high-quality standards to ensure that every layer excels in function and durability.
Tactile vs.
Non-Tactile Membrane Switches.
These are the basic layers of a membrane switch, meaning it will be touched and activated by users.
Tactile switches are designed to provide a tactile response.
The response is typically a ‘snap’ or ‘click’ when the switch is depressed.
This is usually a function of the dome switch that is selected for the application.  You can design the size, force and snap required to activate the switch.
A non-tactile switch works the same as a tactile membrane switch.
In a non-tactile switch, there isn’t a physical snap or indicator that the button has been pressed.  It’s usually indicated through lights, sound or reading on the instrument display.  On a non-tactile switch, the bottom side of the overlay is connected to a conductive pad or an upper circuit layer is printed with conductive traces.
When the overlay is pressed down the conductive traces connect to the lower circuit layer which sends a signal to a printed circuit board.
For machine-actuated applications, a “non-tactile membrane switch” may be a more economical solution.
Tougher and completely sheltered from the outside environment, non-tactile membrane switches are rated for three times as many actuations as a tactile membrane switch.

Advantages of Membrane Switches

A membrane switch offers numerous advantages over a tradition mechanical switch.
Sealed Outer Surface.
With no perforations required for the membranes to interact, membrane keypads are easy to clean, resistant to water damage and ultraviolet radiation, and devoid of crevices for contaminants to nest.
Slim Profile.
The components are tiny compared to mechanical counterparts, making membrane switches extremely portable and easy to incorporate into product designs, even if available touchpad space is limited.
Simple Interface.
Almost any circuitry can interact with a membrane switch with little or no modification.
Affordable.
Simple to design and develop from abundant materials, durable membrane switches are cost-effective compared to touchscreens and rubber keypads.
Screen Printed Graphics.
With a flat surface to work with, the sky is the limit for creativity and artistry in your product design.
If you can dream it up, it can be printed on a membrane switch.
We use both screen and digital printing.
Our Membrane Switches Are Designed to Be:.

Waterproof – Submersible and able to withstand moisture and water spray

Chemical Resistant – Able to withstand harsh chemicals and cleaning agents.
UV Resistant – Does not degrade in sunlight or UV rays.
Heat Resistant – Materials that do not warp or buckle in warm environments.
Scratch Resistant – Able to withstand abrasion.

Anti glare – Viewable in direct sunlight or bright light

Optional Features.
Those are the basics of membrane switches.
From there, we offer tons of options to customize your membrane switch to your needs.
Metal Snap Domes can offer a satisfying “snap” to the actuation of a membrane switch button to ensure user feedback.

LED Indicator Lighting and Backlighting can enhance the function of your membrane switch
Moisture Sealing provides various levels of water resistance to meet your needs

Copper Flex Circuitry can be integrated to accommodate the need for superior circuit performance, including high speed and signal integrity applications.
Embossed Keypads and selective texturing can be designed to create a personalized user experience.
Hybrid membrane switch/rubber keypad solutions can be engineered to meet even the most unique product requirements.
Who Uses Membrane Switches.
Membrane switches are an attractive solution across many industries.
Consumer electronics integrate them into switching control panels and remote controllers for comfort, portability, and economy of space.
Medical equipment and laboratory instrumentation manufacturers find membrane switch panels invaluable due to their resistance to contamination and ease of cleansing.
Membrane switch panels can also be found on exercise and fitness equipment, industrial controls, and telecommunication networking devices.
Why Choose Us.
Butler Technologies Inc.
understands membrane switches and their uses.    It’s all about the details, and we do not cut corners in our drive to deliver results.
As elegant as the final result may look, the care and attention we devote to your concept is what sets us a cut above.
From our first concept discussions to prototyping to pilot runs to gather data and improve, our attention to detail makes the difference in crafting your vision into a product that is economical, durable, beautiful, and marketable.
Our quoting process is user-friendly and completely transparent.
We are always at your disposal to explain why a particular material, process, or method is the best choice to deliver a successful product.
We believe that satisfying results arise only from honest communication and a win-win partnership.
BTI can produce proof of concept models, functional models or functional prototypes at the right level of detail for your project.
We produce labels, graphic overlays, membrane switches, and screened circuits with quality and accuracy to test fit, form and function.
Using our cutting edge digital printing and laser cutting capabilities, we are prepared to meet your stringent delivery requirements.
We can deliver rapid prototype graphic overlays and rapid prototype membrane switches as quickly as 2 business days after you approve the Butler Technologies’ design.

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