Do the metal dome force will become smaller after long time use?

March 1st, 2017

After a long period of using metal dome, do the force will be have some changed? Of course, the force will be reduced to a certain extent, and this process is to reduce the life of metal dome. Please see this formula: (A-B)/B, (the beginning force is A, according to a certain number of times down to the B), when this ratio reaches a certain value, the function of metal dome will be affected, or even dead key.

The change in the force of metal dome is related to the life of metal dome, the longer life, the longer force. And the life of metal dome is based on the material and process flow, so we welcome to purchase our company metal domes, which are high quality and reasonable price.

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Venting for dome array

December 13th, 2016

What’s the Venting for the dome array? The movement of air is called “venting” and is important so that the metal dome functions properly. Lack of venting can cause adverse affects on the feel and function of the switch. While venting is not absolutely necessary for every application, it is desirable in almost all applications. When the metal dome is depressed, air is trapped underneath it. To avoid compressing the air under the dome when actuated, it is recommended that a vent channel be present.
The venting of the metal dome can be achieved a number of different ways. Some Examples: a.) vent channel can go from dome to dome via a spacer layer b.) dome arrays can be top vented through the polyester material c.) vent channel can go through the board. Not properly venting the dome will result in significant loss of tactile response.

Any further information if you need to know, please contact with us.

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How to design the actuators of Silicone?

November 2nd, 2016

As we know, the silicone with actuators always design above the metal dome. But how to design the actuators? As it will affect the click feeling of metal domes.

CMD Manufacture recommends that the bottom of silicone with flat actuators, the size should not exceed 25% of the diameter of metal dome, and it must be in the center of the metal dome.

The unreasonable design for actuators will directly affects the metal dome click feeling, and will affect the quality of end-products. So at the beginning of design, if you are not very familiar, please contact us and we will give a reasonable design.

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Can metal dome array with full-page to stick on FPC boards?

September 13th, 2016

When metal domes make into metal dome array, and the metal dome array can stick on the FPC circuit with full-page? Because the FPC board are generally made with panel, if metal dome array also can make the same position with panel, so that we can save a lot of time to assemble.

As long as you provide the position information of FPC, we can make the dome array according to it, so it is entirely possible to stick on good location, posted one-time with full-page, both accurate and fast. At this period, the labor costs are going too high, it’s very improtant to reduce the assembly time of products to reduce costs. Consider the following picture:
metal
If you need more information, please contact us!

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