Anti-Static ESD/EMI Metal Dome Membrane Keypad Craft Technology
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).
LECTROSTATIC DISCHARGE
Electrostatic discharge (ESD) is a short but intense flow of
electricity when two electronically charged objects come in
contact. In a device with a membrane switch interface, this can
happen when the user presses down a button. As you can imagine, ESD
can damage sensitive circuitry and other components within the
device.
SOLUTIONS FOR SHIELDING INTERFERENCE
Not every membrane switch requires shielding for EMI, RFI, or ESD.
In some cases, the graphic overlay provides enough of a buffer to
protect the internal components. However, for various reasons –
including application, environment, regulations, and more –
additional shielding is often warranted.
Product Descriptions :
| Overlay material ---For front or face overlay |
| Polyester | Polycarbonate |
1 Highly versatile for embossing
2 Highly resistant for chemicals
3 Better durability
4 For internal and external use | 1 wide range of the surface finishes and thicknesses
2 More cost-effective
3 For internal and external use
4 many Lexan label choose |
| 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 |
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
FAQ:
Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown
cartons. If you have legally registered patent, we can pack the
goods in your branded boxes after getting your authorization
letters.
Q2. What is your terms of payment?
A: T/T 50% as deposit, and 50% before delivery. We'll show you the
photos of the products and packages before you pay the balance.
Q3. What is your terms of delivery?
A: EXW, FOB,
Q4. How about your delivery time?
A: Generally, it will take 10 to 15 days after receiving your
advance payment. The specific delivery time depends
on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We
can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but
the customers have to pay the sample cost and
the courier cost.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our
customers benefit ;
2. We respect every customer as our friend and we sincerely do
business and make friends with them, no matter where they come
from.
