User talk:Metal-dome

Metal dome is the most important part of the switches. The raw material is the thickness from 0.05mm to 0.1mm stainless steel. Metal domes with the good conductive to let the end-product work. The metal domes are mainly use in the membrane switches, printed circuit boards, flexible circuit boards, etc. Metal domes with the best return force, it can give the operator to bring a good click feeling. Meanwhile, the life cycles of our main items can reach to one million times. Many different shapes and tactile forces of our metal domes are available in order to meet applications. All of metal domes with various choices in shapes, There are the C-series, F-series, T-series, and O-series, the diameter from 3mm to 20mm, and the force from 100g to 600g. Also have the many types of plating for the metal domes, such as Nickel plating, silver plating & gold plating. Click this website for more www.dgruijin.com

Dome array (metal dome array) is pre-loaded metal dome carriers backed with pressure-sensitive adhesive film, which are normally applied to PCB, FPC, membrane switches, etc. Normally, the structure is the double layers. There is spacer attached under the Mylar that carries metal domes contacts. The way to assembly is vey easy, quick and effective. When you pressed the center of domes, it contacts the PAD of PCB, and then let the circuit closed; this is the metal dome array how to work. Metal dome arrays are just made as design drawing. It’s possible to manufacture arrays with various sizes to meet customers. Metal dome array have follow items: 1.Single Layer dome array This type of metal dome array is used in the early period of metal dome arrays industry.Metal dome contacts are attached under Maylar.On the sheet,there is an air hole for each dome contact and it is essential for good click-feeling. Character: Light and small Nice handle&returned dome with breathe freely hole on metal dome Mainly used in cheap single layer PCB 2.Double Layer dome array: This type of dome array id 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 danaged by metal dome contacts' burr and block dust coming into PET films. Character: Light &Small Damp proof,heatproof ,cool proof Dustproof is done on the Metal Dome,and oxygenation of Metal Dome has been avoided 3.EMI Priting Dome Array: On top of the Mayler which carries metal dome contacts,silver paste or silver carbon paste is printed as ESD(Electrostatic Discharge Control).This helps reduce electrostatics whivh might be harmful to other parts inside of mobile phones.Electrostatic is gathered on the printed silver paste or silver carbon paste and neutrialized. EMI Single layer---EMI is printed on top og single-layer metal dome arrays EMI Double layer-EMI is printed on top of double-layer metal dome arrays Character: Light&small Damp proof ,heat proof,cold proof Dustproof is done on the Metal Dome,and oxygenation of Metal Dome has been avoided 4.Rubber Glue dome array: There is one layer of Rubber Glue on top of the Mayler or EMI.It has special Plastic performance and can be tightly stick on Keypad or PCBs. Character: Special Plastic performance and tightly stick in Keypad EMI priting has been adopted on current Metal Dome switch,and the priority of EMI prnting lies in controlling the impedance of printing surface below1.0.which result in effect of prevention tp Hertzian waves and electrometer,in this way,the tone can be dealt with on the surface With the infiltration of static the effect of protecting the loop happened Manufacturing engineering can be more difficult compared with the exist Metal Dome Strong applicability to the changeable climite

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