PCBSky

Printed circuit board is the most important part of electronics. Alternately, the acronym has also accounted for printed wiring boards and printed wiring cards, which are essentially the same thing. Due to the crucial role of these boards in everything from computers to calculators, PC board material selection should be undertaken with care and knowledge for electrical necessities of a given piece of equipment. Before the development of the PCB, circuit board materials were mostly covered by nests of entangled, overlapping wires that could easily fail at certain junctures. They could also short circuit once age took hold and certain wires started to crack. As could be expected, the manual process that went into the wiring of these early boards was confusing and painstaking. As an increasing variety of everyday electronic components began to rely on circuit boards, the race was on to develop simpler, more compact alternatives, and this led to the development of the material, PCB. W...

Material, usually substrate material as far as PCB (Printed Circuit Board) is concerned, plays a core role in PCB since it carries its leading functions and properties. Besides, PCB material allows PCBs to conform to some high and special requirement set by the products or projects they’ll work for. Furthermore, it is beneficial to reduce cost and improve products’ reliability when optimal material is selected. Elements to be Considered in PCB Material Selection • Glass Transition Temperature (Tg) Tg refers to the temperature at which material is converted into glass state. Standard Tg stays above 130℃ while high Tg above 170℃ and mid Tg above 150℃. When it comes to material for PCBs, high Tg should be picked, which should be higher than the working temperature current runs. • Coefficient of Thermal Expansion (CTE) As the temperature of substance rises, substance will suffer from expansion or shrinking. When it comes to PCB fabrication, since CTEs in X, Y and thicknes...