How does an aluminum led pcb manufacturer design led printed circuit board?2020-04-20
Types of aluminum led pcb substrates
aluminum led pcb manufacturer core technology
Aluminum core circuit boards, a technology that can be used to meet the ever-increasing requirements for heat dissipation. And aluminum led pcb manufacturer play a vital role in it. These printed circuit boards are mainly used in the high-current area:
- for power LEDs (lighting technology)
- for cooling semiconductor components and
- in general power electronics.
In LED technology, aluminum led pcb manufacturer is using circuit boards with a special, white solder resist in order to take advantage of the resulting high level of light reflection.
Why aluminum pcb manufacturing?
The aluminum core contains a high level of thermal conductivity. And can thus ensure that the heat generated or the power loss of active components can be dissipated quickly and effectively from the electronics to be protected.
One of the most important areas of application for aluminum core circuit boards has developed in the automotive industry in recent years.
The thickness of the copper cladding, as with standardized FR4 printed circuit boards, also depends on the requirements of the electronics or the corresponding current strength. Similarly, the dielectric between the conductor pattern (copper plus surface coating) and the heat-dissipating aluminum core can be up to 130 µm.
Another design option for this technology is to:
- design printed circuit boards with a built-up aluminum substrate and
- copper-filled walkways.
An aluminum led pcb manufacturer uses this principle mainly for multilayer printed circuit boards. However, it must be taken into account that the combination with the FR4 base material significantly reduces the thermal conductivity of aluminum pcb manufacturing.
By using special, heat-conducting prepregs, an aluminum block can be pressed onto the outer layer of a finished printed circuit board. A further thermal adjustment can be achieved by using special “heatsink paste” to fill through passengers. This method is mainly used for the construction of complex circuits.
What is the price of aluminum led pcb?
With the improvement of aluminum substrate production technology and equipment, the price of aluminum substrate products has been accelerated and rationalized. Generally, suppliers will not directly provide quotations for aluminum substrates. Moreover, you can consult nearest leading aluminum led pcb manufacturer for quotations for aluminum substrates.
How does an aluminum led pcb manufacturer design led printed circuit board?
PCB board and aluminum substrate are designed in accordance with the requirements of PCB board. Currently, aluminum-based PCB boards in the market are generally single-sided aluminum substrates. PCB boards are a large variety. Aluminum substrates are only PCB boards.
- One type is aluminum-based metal plate
- because of its good thermal conductivity
- it is generally used in the LED industry.
The PCB board is generally a copper substrate, which is also divided into a single panel and a double panel. The materials used between the two are obviously different. Simultaneously, the main material of the aluminum substrate is an aluminum plate. And the main material of the PCB board is copper.
The aluminum substrate is special because of its PP material. The heat dissipation is better. The price is more expensive.
Comparing the heat dissipation of the two, the performance of the aluminum substrate in heat dissipation is more superior to that of the PCB board, and its thermal conductivity is also different.
aluminum led pcb manufacturer production standards
It can only be said that the production process of aluminum-based PCB board has many requirements. From the most common quality parameters of major manufacturers.
There are mainly the following three requirements:
- Heat dissipation directly affects the service life of the module
- As the name implies, the withstand voltage strength is also the strength against current.
- The mainstream of the market is products with 2KV voltage resistance.
- And the high-end products with 4KV voltage resistance. The quality of the solid resin sheet is the main factor affecting this index.
- Peel strength is the density of bonding between copper foil or aluminum foil and aluminum plate.
- It is an important indicator for aluminum led pcb manufacturerconsidering high-end and low-end products. Because it is related to a series of intricate processes such as board selection-washing-stacking-PRESS.
Types of aluminum led pcb substrates
Single-sided aluminum substrate
Single-sided aluminum substrates generally have printed circuits on one side. And a smooth wireless road Xiaoqiang aluminum substrate editor on the other side. Furthermore, the most current aluminum substrates on the market are single-sided aluminum substrates.
- street lamp aluminum substrates
- fluorescent lamp aluminum substrates
- Lamp aluminum substrate
- high-power aluminum substrate, etc.,
The upper side is the circuit, the lower side is connected to the shell or thermally conductive adhesive. which has a heat dissipation effect. Moreover, there are currently two kinds of raw materials for single-sided aluminum substrates, both domestic and imported.
Shenzhen and Zhongshan are currently the areas with the largest number of single-sided aluminum led pcb manufacturer. Furthermore, single-sided aluminum substrates replace the previous FR4 and PCB fiberglass boards.
Emphasizing high and good heat dissipation:
- Not easy to break, and
The thickness of the single-sided aluminum substrate is:
- 0mm, etc.
Generally, an aluminum led pcb manufacturer determines it according to the overall thickness of the product. Similarly, the drawing of the single-sided aluminum substrate is generally relatively simple, divided into Series and parallel or series and parallel together.
The single-sided aluminum substrate is divided into three layers:
- insulating layer
Aluminum is the heat dissipation effect. The insulating layer is the thermal conductivity effect, and copper is the conductive effect.
Double-sided aluminum led pcb
The double-sided aluminum substrate is divided into 3 layers:
- one layer is copper
- the second layer is thermally conductive insulating material, and
- the third layer is an aluminum plate.
The functions of these three layers of double-sided aluminum substrate are:
- the first layer is used for circuit (conducting).
- The second layer is the key to whether it can quickly transfer the heat generated by the LED to the aluminum plate. Similarly, this requires knowing the thermal resistance of this thermally conductive insulating material.
- The role of the third layer is to transfer the heat from the thermally conductive insulating material to the lamp cup again.
There is also an installation role. So, an aluminum led pcb manufacturer knows how to cool the lamp cup better. Because a pcb manufacturer knows the heat dissipation characteristics of the lamp cup.
Tinned aluminum led pcb – aluminum led pcb manufacturer
For the more aluminum substrates currently in circulation on the market. Its process is to apply a layer of glue on the fiber cloth. For such an aluminum substrate, its thermal resistance is 1.7 degrees Celsius / W.
And some will be 3.2 degrees Celsius / W. Similarly, the thermal resistance is relatively high. So, its thermal conductivity is not very good. The heat transfer is also uneven. Not suitable for high-quality, high-brightness, high-power LED lamps.
Silver-plated aluminum led pcb manufacturer
Silver-plated aluminum substrate is a kind of aluminum substrate technology. That is, a layer of silver material is plated on the surface of the aluminum substrate raw material. Which can better promote the conduction and transmission of the circuit.
Therefore, silver plating on the surface of aluminum is currently on the aluminum led pcb manufacturer mainstream technology is also a trend in the future development of aluminum substrates.
The production of silver-plated aluminum substrates is generally started from the:
- grinding board
- dry film photo imaging
- inspection board
- corrosion inspection
- green oil
- green inspection
- silver plating
- aluminum base surface treatment
- punching board
- Final inspection
At present, the price of silver-plated aluminum substrates is more expensive. Generally, this requirement is only found in large enterprises and aluminum led pcb manufacturer.
Gold-plated aluminum led pcb
Energy saving is the current trend. LED will be widely used. With the breakthrough of technology, the gold-plated aluminum substrate will soon enter the field of daily lighting. Furthermore, this is a new and huge potential market, and China’s aluminum led pcb manufacturer is in the growth stage.
Which is an opportunity and challenge for China’s heat dissipation and energy saving industry. Gold-plated aluminum substrates are widely used in:
- commercial institutions
- vehicles and
- public places
Mainly including general lighting and decorative lighting. Due to the wide range of applications of semiconductor lighting, aluminum led pcb manufacturer and lighting companies around the world have invested heavily Semiconductor lighting market.
aluminum led pcb manufacturer Design guidelines for IMS circuit boards with aluminum core
The metal core circuit is a suitable circuit carrier if the circuit board is exposed to high mechanical loads and high dimensional stability.
The aluminum led pcb manufacturer recommends the following design guidelines for circuits with an aluminum core.
Aluminum core circuits dissipate the heat generated by power components and distribute them evenly over the entire printed circuit board. Instead of the usual FR4 material, a metal plate is used as the base material.
The metal core is preferably made of aluminum sheet with a thickness of 0.25 to 2.0 mm. In principle, it is possible to use alternative materials such as copper or brass. However, the comparatively high raw material prices would make the placement unnecessarily expensive.
The insulating layer consists of epoxy resin-glass fiber material (prepregs). Moreover, the excess resin serves as perforated wall insulation.
The advantages of an aluminum core circuit board are:
- higher mechanical strength,
- low moisture absorption,
- low expansion coefficient, especially in the Z-axis,
- Dissipation of the heat and generated in the power components
- Thermal sensors: With a metal core circuit, it is possible to measure the heat generated by the power components with a sensor. And to use them for regulation and control purposes
Multi-layer aluminum led pcb manufacturing
For the construction of a multi-layer IMS circuit board with an aluminum core, aluminum led pcb manufacturer laminate copper foils on the top and bottom of the aluminum core using prepregs. Similarly, the IMS circuit board can plate through. With this constellation, it is also possible to manufacture multilayers with a 0.5 mm aluminum core.