Technical Support

• Which Advantage about the METAL DOME that GUANGHONGDA TECHNOLOGY manufacturing ? which make use of thinner 0.05mm~0.1mm thickness SUS301 stainless Steel , Features are :

1. 1.Customized Shape ,
2. 2.Life-time is over 5Million hits ,
3. 3.High-presion
4. 4.Small CHanging rate ,
5. 5.Stable force & click ratio ,
6. 6.Sensitive Contacts & etc.

It's convenient to take to stick on the appearance of PCB , FPC or Membrance switch Insteaded ,

Which is widely used in the field of : Mobilephone , POS MACHINE , Remote control , Devices Panel , Camera keys , Laptop Keyboards and other keypads .

GUANGHONGDA TECHNOLOGY METAL DOME MAJOR TECHNICAL SPEICIFICATION
ITEM	DESCRIPTION	METAL DOME TECHNICAL INDEX
1	LONGER LIFE-TIME (HITS)	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 HIts
		In compare of initial value , The change rate <30% after 1MILLION Hits
2	Click Ratio %	Force:100gf~450gf; Tolerance : ±20gf
		Click Ratio: 50±10% Normal Condition
3	Metal Dome 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%