This year as a continued commitment to our customers and our product, we decided to put the official stamp on the quality programs, processes, and standards that have been in place for over a decade. Sensigraphics is pleased to announce our new ISO 9001:2008 Certification.

View Sensigraphics’ ISO 9001:2008 Certification

Contact Sensigraphics

As always, we invite you to contact us for any further information on our ISO 9001:2008 certification or other Sensigraphics solutions.

Membrane Switch components:

A basic membrane switch is composed of multiple layers:

1. An optional Graphic Overlay layer
2. An optional ESD shielding layer
3. A film containing a conductive contact (circuit)
4. A spacer layer
5. A flexible static layer and adhesive

The layers are laminated together to form low profile switches.  The definition of membrane switch can include a graphic overlay laminated to the top of the layered switch.
For more information on Graphic Overlays, please click here

The graphic overlay can have many options included in it such as:

• Windows
• L.E.D.
• Lenses
• ESD, RFI and EMI shielding
• Fiber optic and electroluminescent backlighting
• Embossed keypads
• Polydome tactile circuit layer and special finishes

This is just to name a few.

Membrane Switch Advantages:

A membrane switch offers a low cost, reliable alternative to mechanical metal and plastic switches.  Membrane switches, because there is no way for dust or spills to ingress into the circuitry, are far less susceptible to those hazards than non-membrane switches. For that reason, they are useful in industrial control equipment, where they may be exposed to hazardous industrial ingredients. They are also very well suited to use in outdoor control panels and in interface devices like remote controls.

Membrane switch technology has become a reliable user interface solution where environmental concerns or frequent cleaning are an issue. The sealed nature of the technology coupled with its reliability and ability to offer considerable aesthetic flexibility make it the solution of choice for many industries.  Membrane switches are environmentally sealed, easy to clean, chemical and abrasion resistant, low cost, and can be replaced in the field.

Membrane Switch Manufacturers:

In comparison to a discreet switch, a membrane switch creates a thinner, more attractive device with both versatile and economical alternatives. In addition, tooling costs are nominal, utilizing a steel rule die or laser cutting process.

The success of any membrane switch design is greatly enhanced by the effective communication between the customer and manufacturer. When searching for a membrane switch manufacturer, look for a company that will work diligently to cost effectively meet your design requirements and provide solutions that add value and profit to your products.

For more detailed and technical information on Membrane Switch design, please follow the link below to download our FREE Membrane Switch Design Guide or visit our website.

This document is filled with technical and application tips on materials, actuation, circuitry, shielding, connectors, lighting options, and many other top considerations for designing the ideal interface for your next project. Our hope is that this guide will provide our customers with the tools needed to develop a basic technical understanding of the processes and capabilities associated with membrane switch, graphic overlay, and control panel design. As always, our staff of designers and engineers are available to assist with each step of the process to take your project from concept to completion.

Here is a screenshot from our Design Guide:

For more information on the design process and application considerations for membrane switches and graphic overlays, please download the rest of the free design guide by visiting our website or directly by clicking the button below.

We hope that you find this information helpful.

The following is a brief excerpt from their article titled, “Understanding the Value of a Membrane Switch”

“If you’re having trouble understanding how and why membrane switches are useful and important tools, consider this situation … One of your friends, whose personality is characterized by a combination of hyper excitability and limited spatial awareness, inadvertently knocks a plate of sticky snacks over onto your remote, which is on the floor … If your remote is composed of a plastic shell with a single switch membrane, you can simply wipe off the surface and resume watching the game. Membrane switches are composed of several layers of membranes that allow users to interact with the devices’ circuitry without the possibility of contaminating it. These devices are prized also because they can, in certain configurations, resist hazardous climatic conditions like moisture or dust accumulation, which means that some membrane switches are suitable for use outdoors. Imagine the implications for industry, where hazardous materials can frequently be in use. They also involve fewer moving parts than other kinds of keypads and switches, which means that they feature fewer things that can go wrong. For these reasons, membrane switches are very popular and important utilities.”

For the rest of the article. Please visit Membraneswitchnews.com

Well, it has been proven that tactile feel and feedback can do all of that and more. Tactile response is not just about placing a dome in the membrane layers and getting a snap. There are different ways of the designing the membrane switch that affect the tactile feel. When the metal dome is actuated in a Sensigraphics designed switch you have that crisp tactile feel that will benefit your products.  

1-What is behind the membrane switch?

Before we even get into the membrane switch, I always ask a customer what is behind the membrane switch. This helps determine if the force behind the dome being actuated is a strong contact point for the snap back of the dome. Whether you are using a metal or polyester dome, you begin to lose a large percentage of your tactile response when the backer is not firm enough. It is suggested that a very firm backer of some type of metal or ABS plastic backer is behind the membrane switch. For example if you actuate a dome on flexible backer the deflection compromises and absorbs the snap back force,  but when actuated on a metal or ABS plastic backer, there is little to no snap back force  being absorbed. “One of the best ways to improve tactile response in a membrane switch is to add strength to the backing of the domes,” advises Bill Morris, Vice President and Chief Engineer of Sensigraphics.

2-What kind of Dome to use?

Domes have their own unique strengths and differences. Most of these differences have to do with the actuated tactile feel of the dome. The best size to use in most cases is a square 12mm 340 gram dome. It’s about the size of the tip of the finger and the trip force combination that is not too soft and not too strong. There are two types of Snaptron standard square domes, the F-series and U-series. The F series is the standard dome and the U series has the ultra snap. The U-series is ideal for anyone who wants a little bit more actuation response than the standard F-series. The domes can be seen at http://www.snaptron.com/domesdomesstanuserzxqL3157.cfm.

3-How many layers are between the dome and the force?

When you begin adding multiple options for your membrane switch they will make your product stand out. However a drawback to this is adding multiple layers and receiving a lower tactile ratio. The risk of the dome being actuated by indirect pressure is also increased. To solve the problem of maintaining your membrane options without sacrificing tactile feedback, a thin polyester or polycarbonate layer can be added with a small-debossed bump directly above the middle of the dome. This extra expense is worth the peace of mind.

Happy Holidays from all of us at Sensigraphics with our best wishes for a happy, healthy and prosperous 2012.

Here are some of the technologies available and their advantages:

Projected Capacitive technology allows for multiple zones of touch to occur. This can be accomplished due to an invisible grid of sensors on the back of the substrate that map the location of all fingers that come in contact with the screen. The grid pattern detects location of touch by determining relative levels of current within the matrix.

Surface Acoustic Wave technology is the next most advanced technology and is best suited for kiosks and Point of Purchase displays. It relies on piezoelectric transmitters and receivers arrayed along the edges of the touch screen. They transmit and receive signals at once, by converting the signal into ultrasonic waves. When you touch the screen, the waves fan out, are absorbed by the array of traces around the perimeter of the screen, and a touch event is directed to the point.

Advantages:

• Most widely used touch technology
• Activation by finger, soft conductive stylus or some gloves
• Low Cost and wide range of sizes

Resistive technology offers the durability that – for example – a field tester will need when using an instrument to detect leaks. Much like membrane switches, many of the same ruggedized materials are used in their construction. They hold up well to temperatures between -10º and 60º C. Due to the ITO shield, these touch screens are resistant to shorting or interference as well as chemicals. The screen, while appearing solid, is actually a thin shield with a space between it and the glass. When this durable and conductive ITO shield comes in contact with the glass, the location is noted and a command is executed.

5-Wire Resistive touch screens interact with some form of microprocessor, LCD controller and a graphics chip which renders images on the screen. 5-wire resistive touch screens render the images to the LCD allowing the processor to work harder processing information, especially for hi-use rugged applications. This is because they have a glass substrate suited for more extreme temperatures. Light screens can be added for outdoor usage. LED back lighting is often used to increase contrast and brighten the graphics.

Advantages:

• Most widely used touch technology
• Activation by finger, stylus pen or gloved hand
• Low Cost and wide range of sizes

Surface Capacitive touch screens generally are composed of a scratch resistant top layer, an insulator around the perimeter, a clear anti-glare hard coated layer, then the electrical traces that exit as a connection tail, under this array of traces is the conductive coating, and finally the glass. We choose to reinforce the tail at the conjunction of the traces before their parallel path down the tail. The tail is fitted with a connector each specific controller.

Advantages:

• Withstands contaminants and liquids
• Very light force by finger or tethered pen for activation
• Extremely fast response to touch time

Touch screens are rapidly becoming the interface solution of choice in medical technology, military applications, testing and detection equipment, retail banking, transportation, and the entertainment and gaming industry, just to name a few.

Touch screens are part of our daily lives as we make transactions, buy groceries and home improvement products, or travel to our next destination. They continue to be the next destination for designers who develop new products around the world. Sensigraphics is proud to be a part of this growing world-wide creative technology for a new generation of designers.

For more information reference our touch screen product page.

Welcome to the first edition of Touch Points, the new Senisgraphics blog on the latest developments in the industry. Although we have been around since 1994, our latest year has been our most eventful. Our new blog is small part of the overhaul of our company and is part of our commitment to provide leading industry ideas and information.  Our new logo, web site, blog and new facility are all part of the “new” Sensigraphics story, positioning our company for the future. Yet, we still maintain the same dedication to customer satisfaction by hand selecting our customer base and providing top notch design, engineering, and prototyping services.

As you may know, Sensigraphics is an industry-leading manufacture/supplier of custom of membrane switches, graphic overlays, control panels, and touch screens.  Sensigraphics is the most dependable partner for manufacturing user interface components and utilizes the most state of the art manufacturing techniques and equipment.  We moved earlier this year to our Mount Laurel, NJ facility to specifically encompass a one piece flow system using lean manufacturing principles and are convienently located with Productive Plastics, a custom plastics thermoformer. In addition Productive Industrial Finishing, a custom industrial finishing and powder coating facility is also located nearby.

At Sensigraphics our custom capabilities and core competences are broad and include:

• Membrane Switch Assemblies
• Graphic Overlays
• Elastomer Keypads
• Control Panel Assemblies
• Touch Screen Assemblies
• Graphic labels/overlays
• PCB Based Switch Assemblies
• Prototyping
• Design and Engineering

Lots of changes here at Sensigraphics, but our commitment to providing the highest quality products and service remains unchanged.

We will enjoy sharing our thoughts and ideas via Touch Points. But more importantly, we seek your feedback. We look forward to hearing from you.