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Heavy Copper PCB
Recent years have seen a surge in demand for heavy copper PCB especially in the manufacture of computers and other integrated industrial control systems. More than 70 percent of the current printed boards are not capable or is incapacitated in producing thick solid copper printed circuit boards.
Heavy copper PCB is manufactured with copper weights from around 3-20oz/ft2, and copper weights above 20oz/ft2, which is referred to as extreme copper. The added copper weight combines with an appropriate substrate and thicker plating to transform the holes from a weak PCB into a robust, durable wiring platform.
An increase in the number of electronics products is also taking advantage of the growing trend in the printed circuit boards industry.
Heavy copper PCB technology offers the possibility to utilize sophisticated switches in a limited space when combined with circuits for high current levels. Many layered PCBs have reliable processes to produce the copper layer thickness of up to 25 Oz.
Heavy copper PCB, popular with high power and heavy current circuits are designed and produced separately on separate PCB. Heavy copper PCB integrate massive current circuits to realize a highly dense simple board structure.
These circuits are usually used for power grid switching systems, high power rectifiers, computer manufacture as well as military installations.
What industries are served using heavy copper PCB?
Here are the industries that utilize heavy copper PCB in addition to the ones mentioned above:
o Solar panel manufacturers
o Welding equipment
o Automotive engineering
o Power supplies
The benefits of Heavy copper PCB
a. Heavy copper PCB has the following advantages to industry:
b. Increased current conveying capacity
c. Increased endurance and resistance to thermal strains
d. Increased mechanical strength in PTH holes
e. Increased capacity to absorb high temperatures without circuit failing
f. Small size PCB possible due to incorporating copper weights
g. Ability to transfer heat to an external heat sink
h. On-board heat sinks on the board surface
i. Onboard planar transformers with high power density
Circuit Board Strength and Survivability
Heavy copper PCB makers and designers can select from a variety of dielectric materials, ranging from standard FR4 to high-temperature polyimide. Sometimes high temperatures can call for unconventional materials for circuit industry has developed a test method for assessing the thermal integrity of a completed circuit product.
The amount of current heavy copper PCBs can carry on how much heat the project can tolerate, any heat rise and current flow are related. If a current flows along a trade, there is bound to be a 12R power loss that results in heating. Trace cooling arrives due to conduction and convection. So to find the highest current a trace can safely convey, we must identify a way to estimate related heat rise. It's advised to arrive at a stable operating temperature where total heating equals total cooling.