Ceramic PCB Board

Manufacturing of Ceramic PCBs: combination of copper layers with a substrate of ceramic materials made by applying a high value of temperature. Custom ceramic circuit boards from FS Technology can provide your project with better performance than FR-4 and metal materials.

Directory of Ceramic PCBs

What is a Ceramic PCB

Ceramic printed circuit board is a type of circuit board processed by a special process. A variety of different techniques are currently available to produce ceramic board, such as LAM technology with laser rapid activation metallization. There are ceramic base materials used in ceramic PCB with the other conductive substances such as aluminum nitride, and beryllium oxide. Thanks to the strong connection among the ceramic and copper plates, it can operate in any condition where the other plates do not work. As a high-quality ceramic pcb manufacturer, FS Technology can provide you with the following types of substrates:

Features and advantages of Ceramic PCB

FS Technology provides you with the characteristics of different types of ceramic PCBs

Alumina PCB

Alumina PCB is a type of ceramic PCB, which is two different concepts from aluminum PCB. Aluminum PCB uses pure aluminum as the substrate of the circuit board, and it just adds a thin layer of alumina ceramic coating on the aluminum substrate. This ceramic PCB retains the superior thermal dissipation properties of ceramics while taking advantage of the mechanical properties of IMS. Common circuit boards are generally formed by bonding copper foil and substrate. These PCB boards are prone to warping to varying degrees due to factors such as overheating, chemical factors and improper production. Alumina ceramic materials have been continuously improved and developed, and their heat dissipation capacity, current carrying capacity, insulation and thermal expansion coefficient are better than ordinary circuit boards. The parameters of alumina ceramic PCB are shown in the following table:

Features96% Alumina PCB99% Alumina PCB
Thermal Conductivity25W/(m·K)31.4W/(m·K)
Surface Roughness (Ra)0.6-0.8μm0.6-0.8μm
Coefficient of Thermal Expansion [20°C to 300°C]6-7.5×10^(-6)°C8-10×10^(-6)°C
Water Absorption Rate0%0%
Maximum Temperature1400°C1600°C
Fracture Toughness3-4Mpa m1/24Mpa m1/2
Withstand Voltage18KV18KV
Volume Resistivity//
Dielectric Constant [1MHz, 25°C]9.410
Sintering Temperature1689°C1700°C
Thermal Shock Resistance200T°C220T°C
Compressive strength25000Kgf/cm²30000Kgf/cm²
Bending resistance3000Kgf/cm²3500Kgf/cm²

Advantages of Alumina Ceramic PCBs

  • It is an excellent insulating material
  • Ceramic PCB prototypes are less expensive compared to other metal core materials
  • Airtight packaging to ensure 0% water absorption
  • Alumina provides it with wear and corrosion protection
  • This ceramic circuit board enables high-density assembly
  • Outstanding thermal conductivity and higher thermal conductivity
  • The alumina protective film ensures that the ceramic PCB has normal mechanical strength
  • Because it can realize multi-layer circuit board structure, its package size becomes smaller
  • The thermal expansion coefficient is close to that of the chip, and it will not be deformed due to changes in temperature difference, which can avoid the problem of circuit de-soldering

As the most popular ceramic material for multilayer packaging, almost any supplier can make it for you, it is commonly used in: LED lighting products, communication equipment, solar cells, braking systems, injection systems, etc.

Aluminum Nitride (AlN) PCB

Although cheap alumina ceramic-based copper clad laminates can provide your project with good mechanical properties and high dielectric strength, this is only a cost-effective consideration, and it is not satisfactory in the application of high-power projects. Aluminum nitride ceramic-based copper clad laminate can not only match its insulation properties and mechanical properties, but also make up for its defects. The thermal conductivity of this ceramic printed circuit board is 10 times that of alumina ceramic-based copper clad laminates. Therefore, FS Technology believes that aluminum nitride ceramic PCB will become the core key of high-power integrated modules, the future of ceramic boards. The following is an introduction to its excellent properties:

Thermal Conductivity170-320W/(m·K)
Mohs Hardness8
Surface Roughness Ra0.3-0.5μm
Coefficient of Thermal Expansion [20°C to 300°C]4.6×10^-6°C
Water Absorption0%
Max Temperature2500°C
Fracture Toughness320-330MPa m1/2
Elastic Modulus310-320GPa
Volume Resistivity>10^13Ω·cm
Dielectric Constant [1MHz, 25°C]9
Dielectric Loss [1MHz, 25°C]3.8×10ˆ-4
Dielectric Strength17KV/mm

Advantages of AlN Ceramic PCBs

  • It is a multifunctional ceramic PCB
  • First choice for high power projects
  • Buy in bulk from FS Tech for a better price
  • This substrate has the best thermal conductivity
  • A combination of best-in-class thermal properties and low expansion
  • FS Tech considers it a perfect replacement for existing printed circuit boards.
  • Like other ceramic PCBs, it is characterized by rigidity, durability, and 0% water absorption

Due to the high price of this ceramic circuit board, it is recommended to use it in these projects: injection systems, high-power electronic semiconductor modules, solar cells, high-power LED lights, air conditioners, refrigeration chips for refrigerators, automotive ABS systems, etc.

Silicon Nitride PCB

Since the 21st century, the new energy vehicle industry has begun to develop rapidly. On November 2, 2021, the “New Energy Vehicle Industry Development Plan (2021-2035)” issued by the State Council of China in the General Office caused heated discussions. The article said: It is estimated that in 2025, the total global sales of new energy vehicles will account for 30% of the total vehicle sales. The development of new energy vehicles has benefited from the help of silicon nitride ceramic plates. The table below compares the performance of ceramic PCBs with alumina and aluminum nitride.

PropertiesHigh Thermal Conductivity Silicon Nitride CeramicsAluminum Nitride CeramicsAlumina Ceramics
Flexural Strength650~900MPa320~500MPa250~400MPa
Fracture Toughness6.5~7MPa•m1/23~5MPa•m1/23.8~4.5MPa•m1/2
Current LoadLargeMediumSmall
Reliability5000 Cycles200 Cycles300 Cycles
Manufacturing TechnologyHardestDifficultEasier (Low-Medium)
Thermal Conductivity90W/m•K100~210W/m•K22~35W/m•K
Thermal Resistance0.201K/W(0.63mm) 00.197K/W(0.63mm)0.275K/W(0.63mm)
Current LoadLargeMediumSmall
Number of temperature cycles (-40~150℃) Conductive copper electrode thickness (mm)
Silicon nitride ceramic substrate>5000>5000>5000>5000
Aluminum Nitride Ceramic Substrate300200  
Alumina ceramic substrate500300200100

Advantages of Silicon Nitride Ceramic PCBs

  • Although it is difficult to get started, its raw materials are abundant
  • Excellent physical and chemical properties, electrical properties and mechanical properties
  • High thermal conductivity and current load are the conditions to meet the heat dissipation requirements of third-generation power semiconductor components
  • It is more reliable because the thermal expansion coefficient can be matched with most semiconductor materials

The manufacturing process of this kind of ceramic PCB is difficult, the reason why FS Technology can supply this type of board for your project benefits from the following advantages.

  • Manufacture of high-purity raw materials
  • Formed PCB manufacturing process and recipes adapted to it
  • Advanced sintering equipment and first-class sintering process
  • Double-sided precision grinding technology for large-size ceramic substrates

Comparison of Ceramic PCB with other materials

If you are struggling to choose a substrate material for your project, you may be enlightened after reading the comparison between ceramic substrate PCB and FR-4.

Here is a summary of the advantages of using ceramics:

  • Airtight packaging and 0% water absorption make it suitable for any wet environment
  • The ceramic plate is small in size, simple in structure, easy to modify the design, and has great advantages in mass production
  • Works up to 350 degrees Celsius
  • Thermal conductivity of ceramic substrate material closer to silicon used in electronics industry
  • Even if it works for a long time, it will not affect its life too much
  • These High frequency PCB provide good operation for high frequency applications
  • Ceramic PCB boards use no organic materials and are resistant to cosmic rays
  • It can be converted to a ceramic board with some variation of the standard board

Ceramic PCB VS FR4

Here is a comparison of ceramic boards and FR4 boards on the basis of different parameters.

  • CTE for these two bands is dependent on the use of components and projects
  • Ceramic substrate material has good response for high frequency applications, while FR4 PCB is moderate
  • The price of ceramics is higher than that of FR-4, and the cost performance depends on the needs of the project
  • Due to technical limitations, the manufacturing and use of ceramic boards is more difficult than that of FR4 boards
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