With a focus on innovation, our design membrane switches go beyond traditional interfaces. From backlighting options to customizable graphics, we offer a myriad of design possibilities to suit your application’s requirements.
Generally speaking, a substrate with a thickness of 0.25mm or less is referred as “thin film”. It is mainly used for the graphic overlayer of membrane switch. We can print with various indicative patterns and texts to represent the operating area of corresponding switch positions. The thickness more than 0.25mm always referred to as a “plate.” It is not suitable for forming three-dimensional keys but can be used as an indicative nameplate without buttons. It can also serve as a backing material for membrane switches to enhance their hardness.
The choice of thickness depends on the size of the panel and buttons. A thicker material increases tactile force but may result in delayed response. On the other hand, a too-thin material may provide a poor click feeling and less noticeable rebound.
Design files (CAD, AI, CDR formats are available) Circuit resistance requirement Printing documents (AI, CDR formats are available) Back adhesive, metal dome, LED, housing, LGF specifications
We can generate artwork/design files for your product or make modifications to your existing artwork. Our in-house design team can assist in reducing your team’s workload or serve as your dedicated design resource. With over 10,000 fully produced designs spanning over 16 years, you can benefit from our expertise to streamline your project’s progress.
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Graphic Overlay
Graphic Adhesive
Upper Circuit Layer/Dome Retainer
Spacer Adhesive
Lower Circuit Layer
Back Adhesive
This layer is the visual layer, typically utilizes high-toughness polyester or polycarbonate transparent colorless sheets with a thickness of 0.25mm or less. Patterns, text and icons are printed on them, serving the primary purpose of providing identification and key functions. Embossed domes may be designed under the icons to look like what we say “button”.
The purpose of this layer is to bond the graphic overlay to the dome retainer or circuit layer below. Yu An always use adhesive materials with 0.05-0.15mm thickness if there is no other requirement.
This is one of two possible membrane layers featuring printed conductive and dielectric circuitry. Not all switches have a top circuit layer. Tactile switches usually utilize a dome retainer in place of this layer.
The spacer adhesive serves as insulation and bonding between the upper and lower circuits. It typically consists of a double-sided adhesive with a PET substrate, with a thickness ranging from 0.1 to 0.25mm. PVC material can also be chosen. The thickness of the isolation layer depends on the position and size of the isolation window. This significantly influences the operation force, sensitivity, and reliability of the membrane switch, requiring careful selection.
Both the upper and lower circuits utilize a flexible and durable polyester film (PET) with a thickness of 0.125mm (in some cases, 0.075mm and 0.1mm may be used). The film is printed with conductive silver paste and conductive carbon paste. Drying and aging processes are applied to impart conductivity. For circuits with wire outlet spacing less than 1mm, the risk of puncturing the silver paste during connection to a gold finger socket is high. It is recommended to use a wear-resistant Flexible Printed Circuit (FPC) for the entire circuit to eliminate defects.
The bottom layer of adhesive should be chosen based on its compatibility with the adhering surface. Select a strong double-sided adhesive that adheres tightly to the surface. When selecting materials for the membrane switch, considerations should encompass overall sealing, waterproofing, insulation, and aging resistance. For outdoor use, the membrane switch must also account for exposure to elements such as wind, rain, temperature fluctuations, and strong ultraviolet radiation from the sun.
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