he FR4 PCBs are composed of woven fiber glass and epoxy resin with copper foil on one side. FR is the short form of Flame Retardant, a halogenated material used as a non-conducive layer with strong adherence to copper. They serve as a self-extinguisher laminating layer.
Aluminum PCB and FR4 PCB (Glass Fiber Reinforced Epoxy Resin PCB) are two common types of PCBs with significant differences in terms of materials, performance, and applications. Copper-based PCBs have better thermal conductivity than aluminum-based PCBs.
The layout of an aluminum PCB is similar to other PCBs. It has one or more layers of copper, solder mask, and silkscreen on it. However, instead of fiberglass or plastic substrates, aluminum circuit boards have metal substrates.
A Rigid-Flex PCB is a hybrid circuit board combining elements of both flexible circuit boards and rigid circuit boards, with an end result of a board that is able to be folded or continuously flexed and is normally formed into a flexed shape or curve during the manufacturing process.
As the name suggests, PCBs that offer strength and flexibility at the same time are Rigid-Flex PCBs. These are a hybrid design that incorporates rigid characteristics and flexible PCB characteristics
In the present world, especially in the current technological era, devices are becoming more compact and advanced. For implementing the compact and at the same time advanced electronic technology in the world, HDI PCBs contribute abundantly
Back drilling is a method to remove the via stub from the specific layer of multilayer PCB. Via stub is a non-functional portion of a plated through hole or via barrel which can cause unwanted reflection leading to signal distortion and lower performance. It is recommended that the diameter of the back drill hole be greater than that of the via hole size.
The manufacturing of HDI PCBs began in the late 1980s. With the successive production of PCBs, the first HDI production began in 1984. Since then, designers and manufacturers have been looking for ways to pack more components in a smaller area. HDI boards are designed and manufactured to comply with IPC-2315 and IPC-2226 standards.
A semi-flexible PCB is a type of printed circuit board made from rigid laminate materials (usually FR4) with sections thinned to 0.3 mm or less to allow bending. These PCBs combine the solid structure of rigid PCBs with the flexibility of modern flexible PCBs, achieving a balance that caters to compact designs.
Copper Core PCBs (CCPCBs) fall under the category of Metal Core PCBs, which use metal as a substrate, hence also known as Copper-Based PCBs. Similarly, Copper Core PCBs also use copper as a substrate, mainly because of the thermal conductivity properties of the material while maintaining the durability of the board itself