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PCB Assembly for Membrane Switches

PCB Assembly for Membrane Switches

May 16, 2021

Your Comprehensive Guide on PCB Assembly for Membrane Switches

You may encounter PCB assembly for membrane switches while shopping out for switching solutions. Just like any other membrane switch, the PCB membrane switches are defined by the flexible material used in their construction. Moreover, these membrane switches also feature more than one circuit board. The circuit boards are positioned on a flexible substrate. Thus, the PCB assembly for membrane switches is not exactly the same as other standard membrane switches. Want to know more about it? Stay tuned then.

PCB assembly

What Is PCB Assembly for Membrane Switches?

The PCB assembly for membrane switch is a new technology that combines membrane switch technologies in a single device. It can function as a support panel for supplying the electrical pathways. PCB stands for the printed circuit board.

These circuit boards are made of fiber material or copper-clad cloth infused in a resin material. The most common type of material used in the PCB membrane switches these days is FR-4. The copper board used in the printed circuit board is known as the copper-clad laminate. Furthermore, the fiber material or the resin material used in the PCB board determines the characteristics of the laminate produced.

What Is the Difference Between PCB Membrane Switch and Flex Membrane Switch?

There is a great misunderstanding that the PCB membrane switches are almost similar as the flex membrane switches. But, this is not the case. Although both of them are quite similar, they have several unique features that make them different from each other.

For example, the PCB membrane switches are made of fiber material for the inner layer. On the other hand, the flex membrane switch features thin dielectric materials. Moreover, both of the membrane switches contain minimum of one electrical contact that is made from a flexible material.

What are the Advantages of PCB Assembly for Membrane Switches?

Although PCB membrane switches are a bit expensive than flex membrane switches, they offer several advantages to the users. Let’s take a look at some of the advantages below.

1.      High Electrical Conductivity

The greatest advantage of the PCB membrane switch is that it offers high electrical conductivity to the users. All the circuits are designed in such a way that they control electricity quite easily.

As a result, their performance is highly influenced by their conductivity. Another great thing about these switches is that they do not resist conductivity. Otherwise, they would have failed to open and close the circuit at the right time.

2.      Support High Soldering

PCB membrane switches are also known to support high soldering. This is what gives them an edge over the flex membrane switches. To put it in simpler words, the manufacturers are not required to build the PCB switches using epoxy or adhesives. They can easily build the PCB membrane switches by soldering the individual components together.

3.      Resist Extreme Environments

Another huge advantage of the PCB membrane switches is their ability to resist extreme environments. These switches have a sealed design that prevents the liquid from intruding. Otherwise, the liquid would have damaged the other type of electrical switches present around the PCB switches.

4.      Ideal for Smaller Designs

The PCB membrane switches are perfect for smaller designs in the case where dense circuit patterns or routing limitations exist. All you need to do is use the plated thru-hole technology and you will be able to utilize both sides of the PCB switches. This is what gives them a clear edge over the flex membrane switches.

5 Things You Did Not Know About the PCB Assembly for Membrane Switches

There are many things about PCB assembly membrane switches that a lot of people do not know. Let’s take a look at the five things you did not know about these switches below.

1.      They Are Designed With a Copper-Clad Circuit Board

The majority of the PCB membrane switches are designed with a copper-clad circuit board. It further features fiber-infused resin or a copper-covered cloth.

The copper-clad circuit board used in the construction of the PCB membrane switches contains all the circuits that are needed for the membrane switch. Although different types of copper-clad circuit boards are used in the construction of the PCB switches, FR-4 is the most common type of copper-clad circuit board.

2.      They Are Not the Same as Flex Membrane Switches

While a lot of people think that the PCB membrane switches are the same as flex membrane switches, this is not the case. These switches are in fact quite different from each other. Flex membrane switches are different from PCB membrane switched because of their use of dielectric material. In addition to this, PCB membrane switches use a fiber-based inner layer and the flex membrane switches use a dielectric-based inner layer.

3.      Some PCB Membrane Switches Contain Gold

Gold is the third most valuable metal in the world and the PCB membrane switches are known to contain it. We are sure that you did not know that some of the PCB membrane switches contain gold as well. Apart from the high monetary value of gold, it contains many useful properties as well. This is what makes it ideal for electric applications such as PCB membrane switches.

4.      Several Backlighting Options Available

Just like any other standard membrane switch, these lights support a backlight as well. There are several backlighting options available for the users to choose from. The most common type of bulbs used for backlighting in PCB membrane switches is the LED bulbs. The LED backlights are not only energy-efficient but they provide ample illumination as well.

5.      Combine Multiple Technologies

Another interesting thing about the PCB assembly membrane switches is that they combine several technologies. For instance, their circuits are designed on a flexible substrate. Not only this, but these switches feature multiple layers as well. Since the PCB switches combine different membrane technologies, they are considered more versatile than the other standard membrane switches.

PCB assembly

Final Words

PCB assembly for membrane switches offers several different advantages to the users. They do not only offer high electrical conductivity but can resist extreme weather as well. For this reason, they are more popular than the other standard membrane switches present out there. Contact us now for more information!

 

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