Essential details
MOQ:100
Shipping:Express Delivery
Specification Number:custom design
Product Introduction
PET Static Electricity Shielding Design ESD Lexan Mebrane For Computer Keyboard
When it comes to designing computer keyboards with PET (Polyethylene Terephthalate) membranes to protect against static electricity, there are several options available. Here is a summary of the information found in the search results:
Electrostatic Discharge (ESD) Shielding for Membrane Switches
- Electrostatic Discharge (ESD) occurs when a body comes into contact with different materials and is charged with negative electrons.
- ESD can cause damage to sensitive electronic components inside membrane switches.
- ESD shielding is essential to prevent the discharge from reaching the circuitry and components.
- Two effective options for ESD shielding are:
a. Screen-printed grid pattern of conductive silver ink: This layer can be grounded to a trace on the interface panel and routed to a grounded plane on the motherboard.
b. Full conductive laminates, tapes, and foils: These provide higher dissipative properties but can be more expensive.
Materials Used in ESD Shielding
- Polyester: A common and cost-effective option that guides the discharge to the chassis ground.
- Aluminum Single Side Coated Foil: Transfers the discharge away from the electrical components.
- Conductive Copper Mesh Fabric: A high-quality option used in special applications, also protects from electromagnetic interference (EMI) and radio frequency interference (RFI).
- Indium Tin Oxide (ITO): A clear, electrical conductive transparent material used to shield displays from ESD, EMI, and RFI.
Product Descriptions :
| Overlay material ---For front or face overlay | ||||||||
| Polyester | Polycarbonate | |||||||
1 Highly versatile for embossing | 1 wide range of the surface finishes and thicknesses | |||||||
| Embossing --- Graphic overlay or up circuit can be embossed in order to insert metal stainless steel domes for good tactile when press .Leave space for mechanical keys and provide tactile indications | ||||||||
| Pedestal embossing | Rim embossing | Pillow embossing | Dim embossing | |||||
| Windows or LCD --- For display functions | ||||||||
| Printed colors windows such like red ,black and so on | Transparent finishes windows | |||||||
| Keys | ||||||||
| Tactile Keys :witch metal domes or Poly domes ,Metal dome with different diameter and pressure kinds | Non-tactile keys: printed silver spot on the circuit | |||||||
| LEDs ---Miniature LEDs ,LED colors :white ,Green ,Red ,Blue ,Yellow ,Orange and others | ||||||||
| EL and Sensors or inductors --- EL can be light any place where where you like ,and sensors can be used as LEDs | ||||||||
| Cables --- is extension of circuit and communication with your device | ||||||||
| Screen printing conductive silver cable | Copper plated cable /Polyimide or FPC | PCB cable | ||||||
| Types of connector --- 1 Zero insertion force(ZIF) with 0.5MM ,1.0MM,1.25MM pitch ;2 Female connector with 2.54MM pitch; 3 Male connector | ||||||||
| Shielding --- For protection function | ||||||||
| Gasket seal/Waterproof :protect the conductors against from the humidity and splashes | EMI/RFI/ESD Shielding: use an Aluminum foil shielding /clear ITO electrical conductive polyester to protect | |||||||
| Rear Adhesive --- Mostly use the 3M double-side mounting glue brand of USA. Also accepted others such like Lohmann and others | ||||||||
| Back plate --- Use in Aluminum ,Polycarbonate ,Acrylic Or PMMA | ||||||||
| Matching color --- PMS or RAL Is best ,CMYK or RGB also can be ok if you can supply PMS Or RAL | ||||||||
| Standard Tolerances :+/-0.2MM | ||||||||
