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Mylar mobile keypad semi conductor:

1.Scope of Elasticity:160gf
2.Travel:0.15--0.21mm
3.Feel:50%+-15%
4.life cycles:>1million 
5.material: Mylar + Adhesive + Spacer + Adhesive + metal dome

This type is somehow similar to single layer type by means of metal dome contacts attached under Maylar. But the difference is that, in this type, the Spacer is attached under the metal dome contacts. Air paths which function like air holes in single-layer, helps provide good click-feeling when dome contacts are pressed. Besides this effect, air paths help reduce the chance for PET film being damaged by metal dome contacts' burr and block dust coming into PET films.

Metal dome arrays are pre-loaded several metal domes carrier backed with pressure-sensitive adhesive film. You can peel off it together and then stick it on your PCB, FPC, and membrane switches. The way to assembly is very easy and quick.

By placing all of domes simultaneously, production time and cost will be great reduced. Your quality also benefits from use of our dome sheet which avoid “double domes” and dome place errors.

  We can supply different sizes and variations of metal domes, and has extensive experience in metal dome array applications to assist in optimizing designs for every requirement.

 R&J works very closely with its customers in order to insure the success of its projects. Working on the customer’s drawing, the Research and Development Department offers specific solutions that meet your needs.

PRODUCTS:Metal dome array \METAL DOME\ membrane metal dome
Technical Parameter:
Size: Diameter from 3 mm to 12 mm 
life cycles: >1million
Scope of Elasticity: From 180gf
Travel: 0.15mm +-0.03mm
Resistance: <3 ohm
Storage Temperature\ Humidity: -55~+85°C \0~+80%    
Salt and Fog Examination: V35±2°C, 5±0.1%,48H.   
MYLAR initial force test: 4↑(Unit:No/Ball)
MYLAR retention test: 8↑(Unit:hr/kg*inch)
MYLAR adhesion test: 0.6↑(Unit:kgf/inch)
MYLAR shrinkage: MD(%):0.5 ↓ CD(%):0.3 ↓(Unit:100°C*40mins)
Certify: SGS,RoHS,VOA