Tutto quello che c'è da sapere sui PCB in alluminio2020-08-17
Informazioni di base sul PCB in alluminio
Sebbene il layout del PCB in alluminio sia simile ad altri PCB, ma è il PCB più comunemente usato tra i PCB con tutti i core in metallo. Un PCB in alluminio contiene strati di rame e maschera di saldatura insieme ad alluminio con uno strato di serigrafia per coprirli tutti. In questi PCB, viene utilizzato un substrato metallico invece di plastica o fibra di vetro. Vari tipi di PCB in alluminio sono prodotti in una FABBRICA di PCB IN ALLUMINIO, inclusi PCB in alluminio a un lato, PCB in alluminio a doppia faccia e PCB in alluminio multistrato.
Usi di PCB in alluminio
Aluminum PCBs are commonly used in power converting electronics and LEDs. The aluminum layer in the PCB takes away the heat produced by the intense light of the LEDs. In this way, an aluminum PCB can provide more stability and long life to the devices using LED.
Aluminum substrates are also used in stop lights, household lights, and street lights as they help I regulating the electronics by changing the currents of power converters.
They are also useful for many other industries still, they are not popularly by most of them.
Reasons to Use Aluminum in PCBs
The main reason for using aluminum in PCBs is that it removes the heat away and reduces its harmful effect from the important elements in a PCB. Moreover, aluminum can provide more durability and strength to the PCB than fiberglass or ceramic substrate.
Pros and Cons of Aluminum PCB
Environment friendly: Aluminum is friendly to the environment as it is a recyclable and non-toxic metal. Moreover, it can be assembled easily due to its properties of helping in conversing energy. Thus the use of this metal in PCBs can keep your planet healthy.
Low cost: Aluminum metal can be mined and refined in various climatic conditions. It keeps its cost lower than other metals. In this way, the use of aluminum in PCB can reduce the cost of production for an aluminum PCB factory.
Highly durable: Aluminum is a more durable and stronger substrate than fiberglass or ceramic. It can reduce the breakage caused by accidents while manufacturing, and handling in routine because of the sturdiness of this base material.
Dissolution of heat: Aluminum can help in dissipating the heat that can damage electronics severely as it transfers away from the heat from the important elements in an electronic device.
Lightweight: Aluminum is very light in weight as compared to other metals with similar resilience and strength.
- As compared to other substrates used in PCBs the cost of aluminum is higher.
- It is not easy to manufacture double-sided and multilayered PCBs. So at present only single-sided aluminum PCBs are in use.
Organization of Aluminum PCB
In aluminum PCBs, CCLs made of aluminum are used to make them similar to FR4 PCBs in looks. There are four layers in the basic structure of an aluminum PCB including the layers of copper foil, a dielectric, aluminum base, and aluminum base membrane.
The layer of copper foil: A thicker copper foil used in aluminum PCBs as compared to the CCLs normally used in other PCBs. It helps in carrying a larger amount of current.
The layer of dielectric: The Dielectric a thermally conductive material. Its nearly 50μm to 200μm thick layer can make aluminum PCB suitable for their applications as it lowers their thermal resistance.
The layer of aluminum base: This layer of aluminum works as a substrate due to its high conductivity of heat.
The layer of the aluminum base membrane: Being selective aluminum base membrane helps in protecting the surface of aluminum PCBs from unwanted etching and scraping. Two types of aluminum base membranes are used including less than 120 degrees and nearly 250 degrees.
Problems Faced While Manufacturing Aluminum PCBs
An aluminum PCB factory normally faces a few common difficulties while manufacturing them like:
Solder mask printing: The solder mask printing of aluminum PCB becomes difficult due to the thick layer of copper foil. It becomes difficult to print an etched image because there is a large difference between the base board and the trace surface due to the thickness of the copper foil layer. For this reason, solder mask printing is used twice on aluminum PCBs. In some cases, before using solder mask a resin is filled and the oil of high quality should be used for solder mask printing.
Etching of copper foil: Etching on the copper foil becomes difficult because of its thicker layer used in Aluminum PCBs. The thickness of the copper foil is not as required for etching. If the copper foil is more than 3oz then after etching its width may lose tolerance. For this reason, there should be accurate designing of the width of the trace. While manufacturing aluminum PCBs you will have to control etching effectively.
Process of mechanical manufacturing: The internal via of the aluminum PCBs is manufactured by using mechanical methods like molding, v-scoring, and drilling, etc. to reduce their electrical strength. For this reason, while manufacturing aluminum PCBs in low volume professional milling cutters and electrical milling have to be used. In order to prevent the generation of burr, the parameter of drilling should be adjusted during the mechanical manufacturing process.
Applications of Aluminum PCB
Aluminum PCBs are used in various applications because of the thermal dissipation property of the aluminum base used in them. They can be used in the following applications including:
- Power supply equipment like conditioners, stabilizers, and DC-AC adapter, etc.
- Apparecchiature audio inclusi amplificatori bilanciati, amplificatori di ingresso e uscita, amplificatori di potenza, amplificatori audio e preamplificatori, ecc.
- Apparecchiature automatiche per ufficio come driver del motore ecc.
- Apparecchiature di comunicazione elettronica come filtri del circuito elettrico e amplificatori ad alta frequenza, ecc.
- Moduli di potenza come ponti raddrizzatori, inverter e relè solidi, ecc.
- Computer come un'unità disco floppy, una scheda madre e un dispositivo di alimentazione, ecc.
- Interruttori a microonde come dispositivi a semiconduttore, radiatore, controller del motore e isolamento termico, ecc.
- Dispositivi di controllo elettronico come componenti di circuiti, relè e basi a transistor, ecc.
- Illuminazione come lampade a risparmio energetico utilizzate per banner promozionali e luci a LED utilizzate in varie applicazioni su larga scala.
- Veicoli industriali come regolatori di tensione, accensione, sistema di conversione dell'illuminazione e sistema di controllo automatico della sicurezza, ecc.
- Display a LED come fonte di luce e display a LED.
Pertanto, i PCB in alluminio prodotti in una fabbrica di PCB in alluminio possono essere utilizzati in un'ampia gamma di applicazioni.
Se desideri maggiori informazioni, contattaci.
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