Ceramic PCB contains a thermally transitive ceramic residue and a binder.
Types of Ceramic PCB
Alumina- you can also call it A1203 or metal baseboard. It is a type of board with dielectric thermal properties and electrically insulated components between aluminum and copper substrates. It would be best to use Alumina ceramic boards for heat dissipation purposes and general temperature maintenance and regulation.
Alumina assemblies consist of three primary layers:
- The first one is a circuit layer containing copper of about 1-10 oz wide.
- Secondly, there is an insulating layer consisting of a thermally transitive and electrically insulating substrate.
- The third layer comprises copper aluminum material.
AIN- you can also call it Aluminium Nitride. AIN is a modern commercial ceramic material. It contains elements that are reproducible and regulated for the past 20 years. AIN is an excellent alternative to alumina due to its dielectric capacities, less thermal expansion coefficient, and sound thermal transmission. Besides, it does not react with most semiconductor manufacturing chemicals.
You can use AIN boards in heat sinks, microwaves, molten metal processing machines, electronic package substrates, insulators, and others.
Why is Ceramic PCB so Popular?
High Thermal Expansion
The first reason why ceramic boards are so popular in the electronics sector is their excellent thermal coefficient expansion. It is good to note that the ceramic base heat transmission almost matches silicon and can act as a connection material. Besides, you can use it as an isolator. Therefore, there is maximum use for the thermal properties of ceramic boards, even in adverse conditions.
The application of ceramic brings a stable dielectric capacity, and you can modify the balance into a partial radiofrequency loss to increase your device’s power. Still, despite the surface toughness, ceramic materials come with an inherent resistance against chemical erosion. Ceramic’s chemical resistance can change to resistance against liquids and moisture.
You can create several use cases to integrate a metal core board with a high thermal expansion. Besides, you can still turn the metal core into reliable conductors using the sintering technique. Therefore, the application of ceramic PCB is beneficial because of its high processing temperatures.
The ceramic board fabrication process creates durability through the use of unique properties, such as toughness. That prevents your PCB from wear and tear. So you can be confident that you will not change your PCB soon because of its slow aging capacity. Also, the high thermal resistance of ceramic PCB makes it assume a decelerated decomposition process.
Lastly, the use of metal cores can serve as inflexible carriers that offer mechanical stiffness. This property makes it easier to use ceramic PCBs in any state of matter because of the high resistance to corrosion and normal wear and tear.