Are you looking Rigid PCB Circuit Board Definition, Types, and Applications for - 2020 !!

 [Rigid PCB is a kind of Printed Circuit Board and is the most significant number of PCB manufactured.] 

Rigid PCB Circuit Board: Rigid PCB is a kind of Printed Circuit Board, and is the largest number of PCB manufactured. It is made of solid substrate material, which can effectively prevent the distortion of the circuit board. Perhaps the most common rigid PCB is the computer motherboard. The motherboard is a multi-layer PCB designed to distribute power from the power supply while allowing communication between all components of the computer, such as CPU, GPU and RAM. Rigid PCB can be used in any position where the PCB itself needs to be set to a shape and maintained during the remaining life of the equipment. Rigid PCBs can be anything from simple single-layer PCBs to eight or ten-layer multi-layer PCBs. Rigid PCB and Flexible PCB are totally different. One is flexible and the other is rigid. Therefore, their application scenarios are different. In addition, there are Rigid Flex PCB. There are similarities between them. However, all rigid PCB have single-layer, double-layer or multi-layer structure, so they have common application scope. 

Characteristics of Rigid PCB : Rigid PCB is a kind of conventional PCB, which can not be like flexible PCB, because rigid PCB can not be twisted or folded into any shape, because it has FR4 reinforcement, which is very useful for increasing stiffness.[2] Rigid PCB is made up of copper trances and paths which are incorporated on a single board in order to connect the different components on the board. The base material of the board is made of rigid substrate which gives rigidity and strength to the board.[3]The computer motherboard is the best example of a rigid PCB with a rigid substrate material.[4]Once rigid PCBs are manufactured, they cannot be modified or folded into any other shape.[5]Rigid PCB is cheaper than flexible PCB. They are traditional PCBs and are widely used in many electronic products.[6]Flexible PCB and rigid PCB have their own limitations and advantages in terms of ease of use and availability. Both of them are used to connect multiple electronic components on circuit boards.

How Are Rigid PCB Boards Manufactured?  Rigid PCB is made up of different layers that are joined together using adhesive and heat, providing a solid shape to board material. Following layers are used to develop a rigid PCB. Substrate Layer - rigid PCB material Substrate layer, also referred base material, is made of fiber glass. The FR4 is mostly used as a substrate material which a most common fiber glass that provides rigidity and stiffness to the board. Phenilcs and epoxies are also used as a base material but they are not as good as FR4, however, they are less expensive and feature unique bad smell.

Some similarities and differences between rigid PCBs and flex circuits:  When designing rigid PCBs, certain design rules must be followed, including minimum hole sizes, minimum space and trace width, minimum distances to board edges, and copper and overall design thicknesses. Additionally, many manufacturing process steps are shared between rigid and flexible PCBs. Such process steps include the drilling and plating of holes and vias, photo imaging and development, the etching of copper traces, pads, outlines, and planes, and the heating (baking) of the circuit boards for the purpose of removing moisture from the PCBs. At this point in the manufacturing process, rigid PCBs head to the solder mask station while flex circuits go to the coverlay station.

When to Use Rigid and When to Use Flexible: Rigid PCBs typically cost less than flex circuits. I say [typically” because when considering the total cost of ownership there are some applications that, when using flexible PCBs, may be less expensive compared to using rigid PCBs. To get a true and accurate understanding of the total cost of ownership, you first need to appreciate the fact that flex circuits may eliminate the need for components such as connectors, wire harnesses, and other circuit boards. By removing these components from a design, material cost, labor and assembly cost, and scrap cost are all reduced. Many electronic devices (laptop and desktop computers, audio keyboards, solid-state drives (SSDs), flat-screen TVs and monitors, children`s toys, and various electronic gadgets) employ rigid PCBs instead of flexible PCBs. However, flex circuits may be found in ultra-compact and/or high-performance devices, including GPS units, tablets, smart phones, cameras, and wearables.Greater sophistication is not the only reason to use flex circuits; low-tech applications,such as LED lights, may utilize flex circuit technology, in some cases because it makes installation much easier.

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