The difference between poly dome and metal dome

July 7th, 2011

Today follow me to know the difference between poly dome and metal dome. The main structure of poly dome is poly rubber adhesive, Mylar, Spacer and printed conductive layer.

First, Poly dome & Metal dome design specifications:

1, Rubber Keypad + Poly dome
2, PC Hydro formed Keypad + Metal dome
3, PC Hydro formed Keypad + Rubber Keypad + Poly dome or Metal dome

The difference between poly dome & metal dome as below form:
poly dome and metal dome specifications
After you know this information of poly dome & metal dome, I think you can know your design requirements. If you need further information, please feel free to contact us.

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What is the EMI?

May 11th, 2011

Electromagnetic Compatibility for short EMC, is an electronic device that is neither interfere with other equipment, but also not influence from other devices. Electromagnetic compatibility likes the same of the security as we know, is the most important quality indicators. Safety involving personal and property, but electromagnetic compatibility are related to personal and environmental protection.
The phenomenon of electromagnetic waves make the function with the electronic components , known as EMI (Electro magnetic Interference). For example, TV screen with “snow”, it said received signal is interference.

EMI Dome Array is the metal domes with top printed layer of EMI, most used in keys pad and cell phone, to reduce electromagnetic interference, increase product safety.

Relative Posts:
1. Laser cutting to make dome array;
2. The function of EMI on metal dome array.

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Circle gold-plated metal domes

March 17th, 2011

Do you need the circle gold-plated metal domes? We are now also being promoted circle gold-plated metal dome. Circle gold-plated metal dome is plated gold on both sides of the metal dome, Mainly used in relatively high value of the membrane switches. Here are pictures of circle gold-plated metal domes: circle gold metal dome

The performance of gold-plated metal dome is more stable than the ordinary metal domes, but prices are also higher. We buy materials directly from Japan, raw material with the gold-plated, so the performance and the quality is very reliable. Compare to some suppliers make metal domes first, and then plated gold, better in the gold plating with material: uniform, stable and reliable.

If you have needs of circle gold-plated metal domes, please feel free to contact us to request samples.

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Dome sheet size and tolerance

February 1st, 2011

Some people may are not very understanding the max size and tolerance of dome sheet, I explain more detial as below:

1, The max. size of dome sheet can do 90*90mm by laser cutting, for larger it should be set up tooling. Because of the high cost of mold, many customers do not understand, in fact, that’s the cost of the mold. If customers really do not want to set up model, it’s the best to be divided into two parts,the effect is the same, but when the assembly is divided into two times only.
2, Dome sheet tolerance, the laser cutting is: +/-0.15-0.20mm; the mold: +/-0.10mm.

If there is anything you need to know further about  the dome sheet , please feel free to contact us.

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