OEM Customized Design Push Button Membrane Switch With Glossy Surface
Key Features
- Momentary Action: Push button membrane switches are typically designed to be momentary action switches, meaning they are open until pressed, at which point they close the circuit to activate a function.
- Customizable Design: These switches can be customized in terms of size, shape, and graphic overlays, allowing for a tailored user interface that meets specific design requirements.
- Durability: Membrane switches are known for their robustness and can withstand harsh environmental conditions. They are often resistant to moisture, chemicals, and temperature variations, making them suitable for demanding applications.
- Backlighting Options: Many push button membrane switches can be equipped with backlighting features, such as LEDs or electroluminescent (EL) technology, enhancing visibility in low-light conditions.
Manufacturing Considerations
- Materials: The construction of push button membrane switches typically involves layers of polyester or polycarbonate for the overlay, along with printed circuit layers made from conductive inks or copper.
- Production Techniques: Manufacturers like CSI Keyboards and Hoffmann + Krippner offer advanced manufacturing capabilities, including screen printing and embossing, to create high-quality membrane switches tailored to customer specifications .
Applications
Push button membrane switches are widely used in:
- Consumer Electronics: Such as remote controls and appliances.
- Medical Devices: For user interfaces in diagnostic and monitoring equipment.
- Industrial Equipment: In control panels and machinery where space is limited and durability is essential.
Membrane Switch Specification:
1)Material---for front or face overlay
Polyester
1.Highly versatile for embossing 2.Highly resistant to chemicals
3.Better durability 4.For internal and external use
Polycarbonate
1.Wide range of surface finishes and thicknesses
2.More cost-effective 3.For internal and external use
2) Embossing--rim embossing pillow embossing dim embpssing
Graphic overlays can be embossed in order to insert domes (tactile), leave space for mechanical keys and provide tactile indications Pedestal embossing
3)Windows ----for display function
1. print colors windows
2.transparent finishes windows
4)Keys/buttons
Tactile keys---with metal dome or poly dome
Non-tactile--silver printing spot
5) Embeded LEDs-
miniature LED, LED colors:white, yellow, orange, green, red, etc.
6)Cable
is an extension of the printed circuit and is used to communicate with your device
7)Types of connector
1.Zero insertion force (ZIF) connector; 2.Female connector; 3.male connector
8) EMI / RFI / ESD Shielding
use an aluminum foil shielding / a clear ITO electrical conductive polyester
9) Adhesive ----mostly used are 3M-double-side glue
10)Backplate---in aluminum, polycarbonate or acrylic
Membrane switch Performance Index:
| Environmentl | Operating Temperature | -40°C to +80°C (-40°to 176°F) | | | Storage Temperature | -40°C to +85°C (-40°to 185°F) | | | Humidity | 40°C, 90% to 95% for 240 hours | | | Vibration | 20G's max. | | Mechanical | Actuation Force | Non-tactile 60g to 300g (2oz to 10oz) | | | | Tactile 150g to 400g (6oz to 14oz) | | | Switch Stroke | Non-tactile 0.1 to 0.5mm | | | Life Expectancy | Tactile 0.6 to 1.5mm | | | | Non-tactile >5 million actuations | | | | Tactile >1 million actuations | | Electrical | Operating Voltage | 35 volts maximum | | | Operating Current | 10 micro amps to 100 milliamps, resistive | | | Operating Power | 1 watt maximum | | | Circuit Resistance | 10 ohms to 500 ohms, dependent on size and layout | | | Insulation Resistance | 100M ohms at 100V DC | | | Dielectric Withstand | >250 VRMs (50-60Hz 1 minute) | | | Contact Bounce | ≤ 5 milliseconds | |
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