Silver Conductive ESD Embossing Poly Dome Tact Button Mebrane Switch Panel
Common materil used in ESD membrane switch :
There are a number of materials you can use to shield your electronic components from ESD.
Polyester
Polyester is a very common and cost-effective option. It is a very thin layer right behind the graphic overlay. Once the silver screen-printed grid pattern comes into contact with ESD, it guides the discharge to the chassis ground.
Aluminum Single Side Coated Foil
A thin aluminum layer, around 3-5 ml, can also be used to transfer the discharge away from the electrical components. The conductive side lays right side up and guides the ESD through a ground chassis point.
Conductive Copper Mesh Fabric
Conductive copper mesh fabric is a very high quality option only used in special applications due to its more expensive price tag. It is frequently used in communication and military units. A single layer of copper mesh fabric will also protect components from electromagnetic interference (EMI) and radio frequency interference (RFI).
Indium Tin Oxide (ITO)
Indium Tin Oxide (ITO) is a clear, electrical conductive transparent, plastic polyester material that is used when a display needs to be shielded from electrostatic discharge. It is difficult to produce and can be more costly, but will fully protect the display area from ESD, EMI, and RFI.
ESD shielding is particularly important in applications where membrane switches are exposed to environmental factors that can generate static electricity, such as:
- Industrial machinery and equipment
- Medical devices
- Automotive electronics
- Consumer electronics with touch-sensitive interfaces
By incorporating an ESD shielding membrane into the design, manufacturers can ensure that their membrane switch products are more resilient and less susceptible to damage from electrostatic discharge, improving their overall reliability and performance.
TESTING ESD SHIELDING
The effectiveness of ESD shielding can be tested using two methods prescribed by ASTM test method F1812: one for measuring contact discharge, and the other for measuring air-gap discharge.
Both methods require some form of shielding that is connected to earth ground during testing. The contact discharge method measures shielding when the discharge tip of a special ESD gun is in direct contact with the keypad. The air-gap method measures shielding when the gun is discharged at a specified distance above the keypad.
For specific applications, the customer must provide performance criteria for the switch so we can accurately evaluate ESD protection level, including the following:
interface application type
mounting conditions for the switch assembly (details about housing, connections, etc.)
discharge test method to employ if applicable (contact and/or air-gap)
ESD voltage protection required (kV)
Common membrane keypad structure choose :
Features:
Flexible
Highly durable
Superior quality
Advanced electronics
Less disruptive interference
Light weight
Optimum strength
High functionality
Low profile surface printing
Excellent abrasion resistance
About Taida:
Taida is a company and was founded in the 2010 year, which focus on the professional design and manufacture of Membrane Switch and Graphic overlays (including different many kinds membrane switch and graphic overlay ,such like LED ,FPC circuit ,waterproof and tactile ,PMMA ,protective film and so on )manufacturers,
Experience:
Taida and engineers have Highly over 15 years experienced and unparalelled engineering solely focused on Membrane switch and graphic overlay designs, 500+ customers from worldwide such like USA,UK ,Germany and others , 1000+ new designs per year
Factory strength and production capacity:
Over 8 full Automatic and Semi-Automatic printing machine,more than 8 punching machine and other professional Automation equipment,such like testing machine ,UV machine and so on , Taida′s capability has reached 300, 000PCS/month in a very short period since company established.
Quality Control and Ensure :
Taida’s quality control system has got certification of ISO9001: 2000, and also the accreditation for RoHS ,REACH ,UL SGS to meet customer′s requirements.All workers are fully trained before going to production line.and Ensure 100% testing and inspecting before shipping .
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Silver Conductive ESD Embossing Membrane Panel Switches with Poly Dome Tact Button Images
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