Archive for the ‘Metal Dome’ Category

The click feeling of metal domes

Thursday, June 14th, 2012

Sometimes we have received customers’ complaints of the click feeling of metal domes, In fact, according to the results of our tests, the data is in the normal range. But why customers complain about this issue?

The click feeling of metal domes = (force- reforce)/force, this is click feeling, usually controlled between 45% -75%. In fact, in metal domes production process, each lot have a little different for the force,so little change also for the feeling. In this industry for the tolerance of metal domes, it’s generally controlled at +/-30g range,so it’s impossible to control in exactly the same feeling.

So as long as it is not outside the tolerance range, it can still be acceptable.

If you have more questions, please feel free to contact us, we are the leading manufacture of metal dome, snap dome,dome arrays and dome sheet in China.

What’s the poly dome?

Tuesday, October 11th, 2011

Now we can make the poly dome,no only the metal dome, snap dome and dome array, if you have this inquiry, please also don’t hesitate to contact with us.

Hereby I introduce poly dome shortly. Poly dome is formed by polyester film hot pressing, and with a switch function. Mainly used for remote control switches,
membrane keypad, flexible pcb, etc..

Poly dome can be printed by silver oil or carbon oil, or silver and carbon oil printing is also an option. Poly dome typically used in two ways: One is poly dome glue with rubber adhesive tape, poly dome’s top adhesive tape to use double-sided rubber adhesive tape, The other is poly dome glue with the PCB board to use, poly dome do not need the top adhesive, but use double-sided rubber adhesive tape to the bottom.

CMD Manufacturer is your best parter of the poly dome, snap domes, metal domes and dome arrays.

Can metal domes afford high temperature reflow?

Wednesday, September 7th, 2011

Recently we received several customers asked whether the metal domes can afford high temperature reflow? and the metal domes if will have the deformations or force changed?

The material of metal dome is stainless steel, in general, our metal domes operating temperature is -40-100 degrees, so if the operating temperature close to 100 or more than 100,  there is definitely change for metal sanp domes, including force and resistance.

Some of the customers put the metal domes on the PCB, FPC and then SMT soldering, the temperature reaches 200 degrees, the performances will be definitely affected, and changed. Although we do not do this test, but is certainly metal snap domes can not pass the high temperature reflow. So now if it’s the only way to put metal dome on the PCB after reflow temperature , so does it work?

We hope to discuss with the friends who know this issues of metal domes, please leave your message. CMD manufacturing engage in providing a variety of solutions for customers.

The difference between poly dome and metal dome

Thursday, 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.