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 .
