POE PCB manufacturing: what is aluminum PCB, the role of aluminum PCB.

                            what is aluminum PCB, the role of aluminum PCB.
The structure of aluminum PCB
Aluminum PCB has a structure similar to other ordinary circuit boards, consisting of more than one layer of copper,
solder mask, insulating layer, and aluminum metal layer.
Main functions of aluminum PCB
·The heat dissipation is strong. The current double-layer boards and multilayer boards have higher and higher
density, higher power, and high requirements for heat dissipation efficiency. Conventional FR-4 is a poor heat
dissipation conductor, and the heat cannot be effectively dissipated in time, resulting in electronic components
High-speed failure, if a heat sink is installed, it will take up a lot of space, so the aluminum PCB can solve the heat
dissipation problem.
·Using surface mount technology
·Replace fragile ceramic substrates to obtain better mechanical durability.
·General materials have thermal expansion and contraction, and printed circuit boards also exist. Thermal expansion
and contraction will affect the service life of the circuit board. The thermal expansion index of aluminum PCB is lower
than FR-4, which can be better extended The service life of the circuit board.
·Strong thermal conductivity. For example, when used in consumer electronic products LED, the conversion efficiency
of light energy is between 20% and 30%, and the conversion into heat energy is above 70%. The use of aluminum
PCB can increase the service life of the product and reduce energy. Consumption.
The most Common aluminum substrate classification
·Single-sided PCB
This kind of aluminum substrate is the most common one, relatively speaking, the process is simple, the manufacturing
cost is relatively low, and the application is particularly wide.
·Hybrid PCB
The most Common is a 2-layer or 4-layer sub-assembly made of traditional FR-4. Bonding this layer to an aluminum substrate
with a thermoelectric can help heat dissipation and improve rigidity.
·Multilayer PCB
In the high-performance power supply market, multilayer IMS PCBs are made of multilayer thermally conductive
dielectrics. These structures have one or more layers of circuits embedded in the dielectric, and blind vias are used
as thermal vias or signal paths, and the manufacturing cost is relatively high.
·Through Hole PCB
In the most complex structure, a layer of aluminum can form the "core" of a multilayer thermal structure. Before
lamination, the aluminum is electroplated and filled with dielectric in advance. Thermal materials or sub-components
can be laminated to both sides of aluminum using thermal adhesive materials. Once laminated, the completed assembly
resembles a traditional multilayer aluminum PCB, with plated through holes passing through gaps in the aluminum to
maintain electrical insulation.
·Flexible PCB
One of the latest developments in IMS materials is flexible dielectrics. These materials can provide excellent electrical
insulation, flexibility and thermal conductivity. When applied to flexible aluminum materials, products can be formed to
achieve various shapes and angles, which can eliminate expensive fixtures, cables and connectors.
The use of aluminum PCB
Audio equipment: input and output amplifiers, balanced amplifiers, audio amplifiers, preamplifiers, power amplifiers, etc.
·Power supply equipment: switching regulator, DC/AC converter, SW regulator, etc.
·Communication electronic equipment: high-frequency amplifier `filtering electrical appliance` transmission circuit.
· Office automation equipment: motor drives, etc.
·Automotive: Electronic regulator, igniter, power controller, etc.
·Computer: CPU board, floppy disk drive, power supply device, etc.
·Power module: converter `solid relay` rectifier bridge, etc.
POE's ability to manufacture aluminum PCB
In PCB proofing, aluminum PCB is a special type of sheet material, which has certain technical thresholds and operational
difficulties, and the cost is relatively high. Therefore, some PCB proofing manufacturers find it troublesome or think that
the number of customers' orders is small and do not want to do it or do less. Wanfeng is committed to solving the
problem that enterprises have nowhere to process difficult boards, precision boards, and special boards in PCB proofing,
and provide customers with single-sided aluminum PCB PCB proofing to meet customers' various PCB proofing needs.