DBC Ceramic PCB
High Thermal Conductivity

DCB Ceramic PCB

DCB (Direct Copper Bonded) technology, also known as DBC (Direct Bonded Copper). refers to a unique process in which the copper foil. and the Al2O3 or ALN (one or both sides) are directly bonded at high temperatures.

The super-thin DCB substrate provides excellent electrical isolation. high thermal conductivity, fine solderability, and strong bonding. It can be etched in the same way as standard FR4 PCB, but it has a higher current loading capability. As a result, DCB ceramic PCB has become the foundation material for the construction . and interconnection technology of high power semiconductor teletronic circuits. as well as the foundation for the “Chip On Board” (COB) technology. which represents the future packaging trend.

Characteristics of DCB Ceramic PCB

  • Shapes with high mechanical strength and mechanical stability. High strength, excellent thermal conductivity, and electrical isolation. Excellent adhesion and corrosion resistance;
  • High reliability and excellent thermal cycling capabilities (up to 50,000 cycles).
  • Etching to various layouts, such as standard FR4 PCB;
  • There is no contamination and no environmental problem.
  • Temperature range: -55°C to 850°C. The thermal expansion coefficient is close to that of silicon. which simplifies power module production technology.
  • DCB has a much thicker conductor (copper) than thin or thick film ceramic board, with a thickness of 0.1mm0.3mm. Here are some additional benefits of using DCB Ceramic printed circuit board.

The Benefits of DCB Ceramic PCB

  1. Because the thermal expansion coefficient of DBC substrate is similar to that of silicon chip. chip can be directly soldered on DCB board, saving the interface layer (Mo plate), labor, and cost.
  2. Reduce the solder layer, reduce thermal resistance, reduce cavities. and increase finished product yield.
  3. At the same loading current density. the trace width of a 0.3mm thick copper conductor is only 10% of that of a standard PCB.
  4. Excellent thermal conductivity allows for small chip packaging. which increases power per unit volume and improves system and equipment reliability.
  5. The super-thin (0.25mm) DCB substrate can be used in place of BeO. eliminating the issue of environmental protection . and toxicity; however, it is rarely used due to its high cost!
  6. Low temperature increase due to high current loading capability. When a 100A current is continuously passed through a 0.3mm thick copper conductor. the temperature rises only 17 degrees Celsius on a 1mm trace width and 5 degrees Celsius on a 2mm trace width.
  7. Reduced thermal resistance. Here are the specifications for a 10mm x 10mm DCB substrate:
  8. 0.25mm thickness equals 0.14K/W
  9. 0.38mm thickness equals 0.19K/W 0.63mm thickness equals 0.31K/W
  10. The high insulation voltage improves personnel safety . and increases the ability to protect equipment.
  11. DCB PCB can be used to realize the new packaging and assembly methods.

Popular of Ceramic PCB

thick film ceramic PCB

Thick Film Ceramic PCB

PCB with a single alignment layer on one side.

high temperature ceramic pcb

High Temperature Ceramic PCB

PCBs with two alignment layers on the same side.


Low Temperature Ceramic PCB

PCBs have two alignment layers on each side.

Applications of DCB Ceramic PCB

High-power LED

High-power LED

DC-DC converters, voltage regulators, high density power conversion and switching regulators.

Hybrid integrated circuit for automotive

spotlights, high current PCBs, high current LEDs, street safety applications and all applications that use LEDs.

High bright light

High Bright Light

Power regulators, ignition tools, switching converters, variable optics and electric motors for electric and hybrid vehicles.

Automotive light system

Automotive Light System

IC arrays, semiconductor heat shields, IC carrier chips, solar cell substrates, heat sinks and semiconductor cooling devices.

Street light

Street Light

Balanced, input and output, audio, power and pre-shielded amplifiers.

Household appliances: flat panel displays, motor controls.

Benefits of Ceramic Substrate PCB

1.Stable Shape
The majority of the substrate material is glass fiber FR-4. phenolic resin FR-3. aluminum base, copper base, PTFE, composite ceramic, and other materials. and the adhesive is usually phenolic, epoxy, and other materials. It is easy for PCB board warpage to occur during the PCB processing.  due to thermal stress, chemical factors, improper production process. or in the design process due to asymmetry of copper laying on both sides.
Ceramic circuit board is bonded together by magnetron sputtering copper and substrate. strong bonding, copper foil will not fall off. high reliability, and thus avoids the warpage of ordinary PCB.
2.Loading Capacity
100A continuous current through a 1mm-0.3mm thick copper body causes a temperature rise of approximately 17°C. 100A continuous current through a 2mm-0.3mm thick copper body causes a temperature rise of approximately 5°C.
3.Thermoelectric Conductivity
Ceramic PCB with alumina thermal conductivity can achieve 15-35. while aluminum nitride can achieve 170-230. Because high bond strength will also match the coefficient of thermal expansion. the tensile strength test value can reach 45 MPa.
4.Thermal Conductivity
The thermal conductivity of a high thermal conductivity aluminum substrate is typically 1-4W/M.K. . whereas the thermal conductivity of a ceramic substrate can reach approximately 220W/M.K.. depending on preparation and material formulation.
5.Reduce Thermal Resistance
Thermal resistance of a 10mm ceramic substrate 0.63mm ceramic substrate thermal resistance of 0.31K/W. 0.38mm ceramic substrate thermal resistance of 0.19K/W, 0.25mm ceramic substrate thermal resistance of 0.14K/W
6.High voltage resistance
To protect personal safety and equipment,  using bonding technology, the copper foil will not fall off. high reliability, stable performance in high temperature. and humidity environments . stable high frequency performance with lower AK and DK values than PTFE.

Trustworthy Ceramic PCB Manufacturer

Your Qualified Ceramic PCB Manufacturer

XFDC-PCB has over 20 years of experience fabricating and assembling a wide range of PCBs, including rigid, flexible, rigid-flex PCBs,HDI PCB. Regardless of how simple or complex your requirement is, our cutting-edge equipment and expert team are well-equipped to handle it. When you collaborate with us, you gain access to a wealth of industry best practices that will give you an advantage. We are dedicated to providing quick turnaround times so that you can get to market as soon as possible. Our clients appreciate the fact that we provide prototype quantities as well as large production runs with the same unwavering focus on quality. You can also rely on us for turnkey services and be confident that you will receive high-quality results.

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    Contact Info

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    • Sales01@xfdc-pcb.com
    • Xinfeng Industrial Park, Ganzhou City,
    • Jiangxi Province
    • +86 (0)15542312748