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2 Layer PCBs are the most common type of PCB. Plus, 2 layer PCBs are also known as double-sided PCBs because they have components on both sides of the board. The 2-layer pcb fabrication is by bonding two layers of copper together with a dielectric material in between. And the dielectric material can be either an FR-42 or an FR-44.
A 2 layer PCB works by having electrical signals routed between the two layers of copper. These signals can be either digital or analog. Plus, the dielectric material in the middle of the board helps to keep these signals from interfering with each other.
A 2 layer PCB can be anywhere from 0.010” to 0.060” thick. The thickness of the board will depend on the dielectric material that you use and the size of the components mounted on the board. Also, the thicker the board, the better it is at reducing crosstalk between the signal traces.
To make a 2 layer PCB, you need to start with a substrate, the most common of which is FR-4. Once you have your substrate, you need to add the copper in layers.
The price of a 2-layer PCB will vary depending on the size of the board, the complexity of the design, and the quantity that you order. Plus, 2-layer PCBs are typically more expensive than single-sided board because they require more materials and labor to manufacture. The cost of a 2 layer PCB can range from 1000 per square foot. So, if you need a 2-layer PCB that is 2 feet by 2 feet, it would cost between 4000.
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