What is a PCB for?
It is widely used when working on design electronic electrical, mechatronic, also in research, production and manufacturing, innovative product development. Currently all products (electronic or not) have electronic cards inside with different shapes, characteristics, sizes, components, colours.
What is an electronic PCB?
In any context, ignoring, undervaluing or leaving the electronic board later translates the success or failure in the design, manufacture or marketing of a product (any product actually has electronics) for a company. In fact all engineering equipment (Design, hardware, software, mechanical, mechatronic, electrical, firmware design), or industrial, administrative, financial, marketing, warranty design, depends on a prototype, production or batch, to sell a product (regardless of whether it is electronic or not) and thus achieve the success or financial failure of a company .
It also means the failure of an investigation or enterprise, which generates retraces or delays of months or years of effort to test a new technology , sensor or application , or launch one computer, device, machine, device, appliance to the market .
What is “bakelite”?
The term bakelite is a common word, to refer to a support or base, of the old component circuits linked together with cable. It is usual to confuse “bakelite” with a substrate or laminate of inferior quality called “phenolic” other than the highest quality laminate that is made of fiberglass material . In Conclusion, the laminate or reinforcement material of a PCB can be phenolic (badly called “bakelite” or fiber glass (well called FR-4) .
By the way, the most used fiber glass material is FR-4 , this translates flame retardant or combustion retardant, as the logic that delays combustion in a product or installation in case of fire . But in the world, the term “bakelite” is not used to refer to manufacturing or manufacturing. Depending on the country, other definitions are used such as: printed circuit board, electronic card, PCB board or motherboard referring to the substrate of a conventional electronic circuit.
Properties of the PCB
These have different electrical, thermal, physical properties, which determine their behaviour depending on the application:
What are FR-4 mechanical thermal electrical properties?
PCB Electrical: A property called dielectric permittivity constant (Er). This determines the behaviour (propagation) of a high frequency signal and its electromagnetic fields, in a medium such as fiber glass.
Thermal: Glass transition temperature, is the temperature at which the fiber loses its properties and becomes fragile like glass, expanding exponentially, this happens after the specified temperature TG. It can also undergo an expansion in the Z axis due to temperature, in a percentage way
The PCB material is chosen by a designer according to whether it will suffer from high temperatures, if it will be used in high frequency applications, if it must have dimensional stability, mechanical rigidity if it is to be used in multilayer design, two or a Cape. The above depends on the application and has an impact on the costs , reliability, maintenance and repair of the product.
All products are not equal, classes are related to the increase in complexity , sophistication, functional performance requirements and the frequency of testing and inspection. The user or customer of the PCB is who should determine the class to which your product belongs.