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Keyboard conductive film is mainly used in all kinds of keyboard products, including polyester film PET, conductive silver paste, conductive carbon paste, UV insulating oil, waterproof adhesive.
1. Using high-quality conductive carbon paste, high-quality PET film printing
2. The conductive film of computer keyboard adopts high precision screen printing and precision die stamping
3. Good electrical performance, good handle
4. Strong oxidation resistance, light contact, good handle, low impedance of pure silver circuit
In the three films, the top is the positive circuit, the bottom is the negative circuit, and the middle is the non-conductive plastic sheet. Then put the pressing module on the top (usually including the key cap, the movable module below the key cap, and the rubber cap). When the finger is pressed down from the key cap, the upper and lower films will contact and electrify, that is to say, the conduction is completed
The general keyboard is composed of three layers of flexible circuit base film, and the upper and lower pieces are printed circuit pet. The performance requirements of PET are relatively high. The main requirements are good adhesion of pet, clean surface without impurities and creases to facilitate line printing, and the interlayer is mainly non crease material with good flexibility for punching operation
Major Technical Parameters & Advantages of Metal Dome Array | ||
Item |
Description | TECHNICAL INDEX |
1 |
LONG LIFE-TIME | Round ,Oval, four - legged, triangular, rectangular, three - point side, irregular |
Stainless Steel ,Nickel Plating , Silver Plating & gold Plating | ||
Dimple Numbers : 0/1/3/4/5 dimple | ||
LIFE-TIME : 300 ~3000 Thousand Times | ||
In compare of initial value , The change rate <30% after 1M press-test | ||
2 |
Click % | Force:100gf~450gf, Tolerance : ±20gf |
Normal Condition | ||
3 |
Stroke | Customize in accordance with Customer ‘s requirement |
0.12~0.6mm ,Spec. various by different METAL DOME | ||
4 | Dimension Tolerance | Position dimension tolerance : + /- 0.1mm |
5 | Good Weatherproof Resistance | Under the conditions of 55±2℃,R.H.95% , Replacement 24H , and then resume 2H under the normal room temperature |
6 | Good Corrosion Resistance | High Temperature can bear : +70℃ Lower Temperature can bear : -40℃ |
7 | Tape Adhesive Test | 0.6↑(Unit:kgf/inch) |
8 |
Stable Tape Shrinkage rate | MD(%):0.5 ↓ CD(%):0.3 ↓ |
(Unit:100℃*40mins) | ||
9 |
Small Instantaneous Contact Resistance | (Nickel Plating ) <1Ω, ( Stainless Steel )<3Ω |
10 |
Total Thickness of Base materials | 0.05mm,0.075mm,0.1mm,0.125mm,0.15mm; Normal Thickness Spec. |
| ||
11 | Light-Guide-film Uniformity | >75% |
Shenzhen Guanghongda Technology Co, Ltd has rich experience in exhibition & participation.
Through the face-to-face communication in exhibition, to strengthen our powers as an integrated set of industry and trade company.
Packaging & Shipping
F A Q:
Q1: Are you Trading company or manufacturer ?
A: We are a Professional Trading & Manufacturer Integrated .
Q2 : Can you offer OEM Service ?
A: Surely Okay , we have Seasoned OEM service experience .
Q3: what is the Lead time of sample ?
A : It takes 2-7working days depends .
Q4: How fast can i get the Quotation ?
A: I am smart to understand what customers want , reply quickly , Sometimes you can receive my email within 10mins., even in
deep evening such as 11P.m or 12P.m
Please do not hesitate to contact with us , if you have any inquires .