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We are a professional ALUMINUM OXIDE PCB (ALUMINA), we mainly produce ultra-small bump pitch substrate, ultra-small trace and spacing packaging substrate and PCBs.

Aluminum oxide PCB (Alumina PCB) stands out as a prominent substrate material widely employed in the fabrication of electronic equipment. Aptly named due to its primary component being aluminum oxide, this PCB variant boasts exceptional thermal conductivity and electrical insulation properties, making it particularly well-suited for applications demanding high temperatures and frequencies.

Primarily utilized in scenarios requiring resilience to elevated temperatures and efficient high-frequency operation, such as certain radio frequency (RF) and microwave applications, aluminum oxide PCB exhibits noteworthy characteristics. These encompass outstanding mechanical strength, chemical stability, and superior thermal conductivity. These attributes collectively empower aluminum oxide PCBs to function reliably in specialized environments where robust performance is essential. 

Generally speaking, aluminum oxide PCB is a high-performance electronic material suitable for some applications with high temperature and frequency requirements.


Aluminum oxide PCB, commonly known as Alumina PCB, stands out as a high-performance substrate material extensively employed in the electronics industry. Its distinctive properties position it as the preferred choice for numerous specialized applications. Here is an in-depth overview of various types of aluminum oxide PCB:



Ordinary Aluminum Oxide PCB

This represents the fundamental variant of aluminum oxide PCB, primarily composed of aluminum oxide. Renowned for its outstanding electrical insulating properties, it suits a broad range of general electronic applications. Its cost-effectiveness makes it a prevalent choice in standard circuit board manufacturing.

High Temperature Aluminum Oxide PCB

Tailored for operation in elevated temperature environments, this type of PCB capitalizes on alumina’s exceptional thermal conductivity. It ensures stable functionality under high-temperature conditions, making it suitable for electronic equipment demanding resistance to elevated temperatures, such as automobile engine control modules.

Microwave Aluminum Oxide PCB

Specifically engineered for applications in the microwave frequency band, this PCB type excels in high-frequency performance. Commonly deployed in radar, communication equipment, and other systems processing microwave signals, its special dielectric constant and low loss render it highly effective in these sophisticated applications.

Altogether, the versatility of aluminum oxide PCB types addresses diverse electronic requirements, reflecting its prominence in the ever-evolving landscape of electronic substrate materials.

RF Aluminum Oxide PCB, akin to microwave PCB, is tailored for RF applications and finds widespread usage in wireless communication equipment, antennas, and systems requiring the processing of radio frequency signals. Its exceptional performance ensures signal transmission stability.

Thermal Aluminum Oxide PCB prioritizes heat dissipation and is commonly employed in high-power electronic equipment. Leveraging the commendable thermal conductivity of aluminum oxide, this PCB efficiently conducts generated heat away, averting overheating and promoting device longevity.

Designed for applications demanding high-frequency response, High-Frequency Aluminum Oxide PCB is utilized in electronic equipment processing high-frequency signals, such as high-speed data transmission systems and radio frequency identification (RFID) readers.

The Composite Aluminum Oxide PCB amalgamates the advantages of aluminum oxide with other materials to cater to specific applications. For instance, combining it with copper foil enhances electrical conductivity, while blending with polytetrafluoroethylene (PTFE) improves dielectric properties.

In general, aluminum oxide PCB meets the needs of different applications with its diverse types. Suitable types can be found from conventional electronic equipment to applications in special environments such as high temperature, high frequency, and high power. Its excellent electrical properties, thermal conductivity and mechanical strength make it an indispensable key component in the electronics industry.


Aluminum oxide PCB (Alumina PCB) has many significant advantages, which makes it popular in high temperature and high frequency electronic applications. The following is a Chinese description of some of the main advantages of aluminum oxide PCB:



Excellent thermal conductivity

The primary constituent of an aluminum oxide PCB is aluminum oxide, renowned for its outstanding thermal conductivity. This property enables swift and efficient heat dissipation in elevated-temperature settings, crucial for preserving the stable performance of electronic devices.

Excellent electrical insulation properties

Aluminum oxide is an excellent electrical insulating material, so aluminum oxide PCB excels in electrical insulation properties. This enables it to work in high-frequency circuits without electrical interference, ensuring the reliability of signal transmission.

High temperature stability

Aluminum oxide PCBs perform well in high temperature environments and can withstand higher operating temperatures. This makes it suitable for some applications that require operation in extreme temperature conditions, such as aerospace and automotive electronics.

High mechanical strength

This PCB has excellent mechanical strength and stiffness and is resistant to vibration and shock. This characteristic makes aluminum oxide PCBs more reliable in harsh working environments, helping to extend the service life of electronic equipment.

Chemical stability

Aluminum oxide has good stability to many chemicals and is not susceptible to corrosion. This chemical stability ensures that PCB can maintain its performance in complex working environments and is not easily affected by external factors.

Precision machining capabilities

Aluminum oxide PCB has good processing performance and can manufacture complex circuit board structures through precision processing technology. this Widely used in high frequency electronic fields Due to its excellent electrothermal performance and electrical characteristics, aluminum oxide PCB is widely used in high-frequency electronic fields, such as radio frequency (RF) and microwave (microwave) applications. In these fields, circuit boards are required to operate stably at high frequencies, and aluminum oxide PCB just meets this demand.

Taken together, aluminum oxide PCB has become an ideal choice for many high-performance electronic devices due to its excellent performance in thermal conductivity, electrical characteristics, high temperature stability, etc. Its advantages in various aspects enable it to occupy an important position in the electronics manufacturing industry and provide reliable support for the development of advanced technology.



Why use ALUMINUM OXIDE PCB (ALUMINA) over other boards?

Aluminum oxide PCB (Alumina PCB) has a series of advantages over other common circuit board materials, which makes it the first choice in certain applications. Here are some of the top reasons why to choose Aluminum Oxide PCB over other circuit boards:

To begin with, aluminum oxide PCB boasts exceptional thermal conductivity properties. Given that its fundamental component is aluminum oxide, a ceramic material renowned for its strong thermal conductivity, the aluminum oxide PCB can efficiently conduct and dissipate heat. This feature proves crucial in high-temperature applications, particularly prevalent in the radio frequency (RF) and microwave domains. The commendable thermal conductivity of aluminum oxide PCB plays a pivotal role in upholding the stability of electronic components, preventing performance degradation, and safeguarding against damage caused by overheating.

Secondly, aluminum oxide PCB exhibits excellent electrical insulation properties. This makes it suitable for electronic applications that require a high degree of insulation, effectively preventing leakage and interference between circuit components. This insulation property is important in scenarios that require precision and reliable electrical performance, such as applications in aerospace, medical equipment, and communications systems.

In addition, aluminum oxide PCB has excellent mechanical strength and chemical stability. This allows it to work in harsh environmental conditions and is less susceptible to physical impact or chemical corrosion. This durability makes aluminum oxide PCBs ideal for applications requiring long-term stability and reliability, such as military equipment and industrial control systems.

The production process of aluminum oxide PCB has reached a high level of maturity, allowing for efficient large-scale manufacturing. Although it comes with a relatively higher cost, this expense is often justified by its superior performance benefits. In the realm of high-end electronics, consumers are generally more willing to invest in elevated prices for the sake of enhanced thermal conductivity, superior electrical performance, and overall stability.

Aluminum oxide PCB finds extensive application in environments with demanding conditions, particularly those characterized by high temperatures and frequencies. It is prominently featured in high-frequency radio frequency circuits, microwave antennas, and power modules operating in elevated-temperature settings. The material’s inherent performance advantages in these specialized areas position it as a preferred choice among engineers for circuit board applications.

Generally speaking, aluminum oxide PCB surpasses other circuit board materials in specific fields and becomes a ideal choice.

How to manufacture ALUMINUM OXIDE PCB (ALUMINA)?

The manufacturing process of aluminum oxide PCB (Alumina PCB) is a complex and precise project that requires multiple steps to ensure that the final product has the required thermal conductivity, electrical performance and stability. The following is the general process of aluminum oxide PCB manufacturing:

Material preparation: The first step in manufacturing aluminum oxide PCB is to prepare raw materials. The main raw material is alumina ceramic powder, whose particle size and purity are critical to the performance of the final product. Other auxiliary materials may include binders and additives to improve the plasticity and formability of the mixture.

Sheet Forming: The prepared mixture undergoes a forming process to shape it into the desired PCB sheet. This typically involves pressing and molding to ensure that the aluminum oxide ceramic has a uniform structure and appropriate thickness when formed into sheets.

Ceramic sintering: The cut and trimmed plates enter the ceramic sintering stage. During this process, the sheet is exposed to gases in a high-temperature environment, causing its particles to combine into a dense ceramic structure. This step is key to ensuring the PCB has a high degree of mechanical strength and stability.

Power-saving hole processing: drilling holes on the PCB board for installing components and connecting circuits. These holes are typically machined with a laser or mechanical drill machine to ensure precision and consistency.

Metallization: Making electrical connections by applying a layer of metal, usually copper, to the surface of a board. This step also involves patterning, which involves removing unwanted metal through chemical etching or lasers to create the desired circuit pattern.

Insulating layer addition: After metallization, a layer of insulating material, usually a form of alumina ceramic, is added to prevent short circuits and improve electrical insulation properties. This layer of insulation also needs to be cut and trimmed to ensure it meets design specifications.

Final processing and testing: The finished aluminum oxide PCB requires final processing and testing. This includes surface treatment, printed markings, soldered components, etc. Then it goes through a series of tests, including electrical performance testing and mechanical performance testing, to ensure that each PCB meets design and quality standards.

Overall, the manufacturing process of aluminum oxide PCB is a highly precise project that requires strict control and quality management to be maintained at each step. This ensures that the final PCB has excellent thermal conductivity, electrical performance and stability, suitable for high temperature and high frequency electronic applications.


Aluminum oxide PCB, also known as Alumina PCB, stands as a high-performance substrate material extensively employed in the electronic industry. Primarily composed of aluminum oxide, this material boasts exceptional thermal conductivity and electrical insulation properties, distinguishing itself in diverse specialized environments and applications with stringent demands. The subsequent discussion delves into the detailed application domains of aluminum oxide PCB, shedding light on its pivotal role within the electronics industry.

Foremost, aluminum oxide PCB assumes a crucial position in the realms of radio frequency (RF) and microwave technologies. Leveraging its high-frequency characteristics and impressive thermal conductivity, aluminum oxide PCB finds widespread use in the manufacturing of wireless communication equipment, radar systems, and other electronic products necessitating stable operation at elevated frequencies. Its inherent material properties contribute to the stability and reliability of signal transmission, rendering it an optimal choice for devices operating in the domain of radio frequency electronics.



Secondly, the application of aluminum oxide PCB in high temperature environments is also a highlight. Due to the high melting point and excellent high temperature resistance of alumina, aluminum oxide PCB is widely used in automotive electronics, aerospace and other fields. In these applications, aluminum oxide PCBs are able to withstand operation in extreme temperature conditions and maintain circuit stability, ensuring device reliability and long life.

Furthermore, aluminum oxide PCBs play a pivotal role in the realm of power electronics. In high-power electronic equipment, such as power modules and inverters, these PCBs effectively dissipate heat, mitigating temperature rise, and offer excellent electrical insulation performance, ensuring secure equipment operation even under high-load conditions.

In the fields of optoelectronics and lasers, aluminum oxide PCBs find extensive utility. Their exceptional thermal conductivity and chemical stability position them as ideal substrates for devices like laser diodes (LD) and photodiodes (PD), contributing to the preservation of device performance and longevity.

In medical equipment, its stability and high temperature performance ensure the reliability of the equipment in clinical use. In the fields of satellite communications and energy, its high temperature resistance and electrical performance ensure the stable operation of equipment in extreme environments.

Generally speaking, as a high-performance substrate material, aluminum oxide PCB plays an irreplaceable role in many fields such as radio frequency, high-power electronics, and optoelectronics through its superior thermal conductivity, electrical insulation properties, and high temperature resistance. . Its wide application in the electronics industry promotes the continuous innovation and development of related technologies. In the future, with the continuous advancement of science and technology, aluminum oxide PCB is expected to show its unique advantages in more fields, laying a solid foundation for performance improvement and innovation of electronic equipment.