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Direct Bonded Copper (DBC) is the standard substrate technology for high-power IGBT modules, bonding thick copper directly onto ceramics (Al₂O₃ or AlN) without adhesives. It provides superior heat dissipation, electrical isolation, and low electrical resistance for high-power density applications like EV inverters, industrial motor drives, and renewable energy systems.
Key Aspects of DBC in IGBT Modules:
- Thermal and Electrical Performance: Offers high thermal conductivity (especially AlN), allowing efficient heat dissipation and thermal cycling reliability.
- Structure: Often features copper layers on both sides of the ceramic, enabling double-side cooling of the IGBT chip to increase power density.
- Reliability: Direct bonding prevents adhesion issues, while the CTE (Coefficient of Thermal Expansion) is matched to silicon, reducing thermal stress on the chip.
- Manufacturing: The process involves bonding copper to ceramic at high temperatures, creating strong, insulating, and highly conductive circuits.
Common Applications:
- EV/HEV Power Systems: Inverters, motor controllers, and DC-DC converters.
- Industrial Electronics: Motor drives, UPS, and laser equipment.
- Renewable Energy: Solar inverters and wind energy converters.
DBC ensures that the IGBT module can handle high power density while keeping operating temperatures within limits, improving overall system efficiency.
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Direct Bonded Copper Substrates Fueling Next-Gen
Semiconductor Insight
https://semiconductorinsight.com › blog › direct-bonded...
Semiconductor Insight
https://semiconductorinsight.com › blog › direct-bonded...
A DBC ceramic substrate consists of a ceramic base commonly alumina, aluminum nitride, or silicon nitride bonded directly with copper layers on ...Read more
DBC Ceramic Substrate Direct Bond Copper Sheet for IGBT
Fujian Huaqing Electronic Material Technology Co.,Ltd
https://www.huaqingcn.com › dbc-ceramic-substrate-dire...
Fujian Huaqing Electronic Material Technology Co.,Ltd
https://www.huaqingcn.com › dbc-ceramic-substrate-dire...
Direct Bonding Copper is a kind of composite line subgrade board that is directly sintered copper foil to ceramic surface by hot-melt bonding method at high ...Read more
A direct bonding copper degradation monitoring method for ...
Wiley
https://ietresearch.onlinelibrary.wiley.com › doi › hve2
Wiley
https://ietresearch.onlinelibrary.wiley.com › doi › hve2
Jun 20, 2023 — This paper proposes a DBC degradation monitoring method for IGBT modules, which combines boundary-dependent thermal network and feedback control.Read more
Videos
Web results
The Engineer's Guide to Direct Bonded Copper PCBs
ALLPCB
https://www.allpcb.com › ... › PCB Knowledge
ALLPCB
https://www.allpcb.com › ... › PCB Knowledge
Aug 29, 2025 — Unlock high-power density with Direct Bonded Copper PCBs. Learn DBC thermal performance, advantages, and design tips for power module PCBs.
DCB Ceramic Substrate PCB For IGBT Semi-conductor
bstceramicpcb.com
https://www.bstceramicpcb.com › ceramic-pcb › dcb-cer...
bstceramicpcb.com
https://www.bstceramicpcb.com › ceramic-pcb › dcb-cer...
The ALN-based DBC ceramic circuit boards provided efficient heat dissipation, maintaining optimal operating temperatures within the IGBT module.Read more
Double-side packaged, high power IGBTs for improved ...
IEEE
http://ieeexplore.ieee.org › document
IEEE
http://ieeexplore.ieee.org › document
by S Zhao2000Cited by 7 — Two patterned DBC (Direct Bond Copper) substrates are used to contact the top and bottom of an IGBT chip. In this way, heat dissipation can take place on both ...Read more
People also ask
What is direct bonded copper?
DBC means Direct Bond Copper and denotes a process in which copper and a ceramic material are directly bonded. Normally, DBC has two layers of copper that are directly bonded onto an aluminum-oxide (Al2O3) or aluminum-nitride (AlN) ceramic base.
APPENDIX A Direct Bond Copper (DBC) Ceramic Substrate
VTechWorks
https://vtechworks.lib.vt.edu › bitstream › handle › Appe...
VTechWorks
https://vtechworks.lib.vt.edu › bitstream › handle › Appe...
What is the difference between DBC and AMB?
Direct Bonded Copper (DBC) substrates bond copper to ceramic via a Cu–Cu₂O eutectic reaction at approximately 1065 °C with no braze alloy, while Active Metal Brazing (AMB) substrates use a Cu–Ag–Ti or Cu–P–Ti braze alloy containing titanium that reacts chemically with the ceramic at 800–900 °C to form a stable ...Apr 16, 2026
DBC vs AMB substrates for SiC modules: 50+ patents - PatSnap
PatSnap
https://www.patsnap.com › resources › blog › articles › d...
PatSnap
https://www.patsnap.com › resources › blog › articles › d...
What is an IGBT heat sink?
IGBT heat sink can transfer the heat evenly from the substrate to the fin, which can effectively solve the heat dissipation problem of high heat flux, not only with high efficiency, but also with compact structure and no moving parts, which can truly realize maintenance-free.
Igbt Heat Sink
LORI Heat Sink
https://www.lorithermal.com › igbt-heat-sink
LORI Heat Sink
https://www.lorithermal.com › igbt-heat-sink
What is DBC in power module?
Direct Bonded Copper (DBC) substrate
Structure of a direct bonded copper substrate (top) and an insulated metal substrate (bottom). DBC substrates are commonly used in power modules, because of their very good thermal conductivity.
Structure of a direct bonded copper substrate (top) and an insulated metal substrate (bottom). DBC substrates are commonly used in power modules, because of their very good thermal conductivity.
Power electronic substrate - Wikipedia
Wikipedia
https://en.wikipedia.org › wiki › Power_electronic_substr...
Wikipedia
https://en.wikipedia.org › wiki › Power_electronic_substr...
Web results
Understanding Direct Bonded Copper Substrate Benefits
pcbmake.com
https://pcbmake.com › direct-bonded-copper-substrate
pcbmake.com
https://pcbmake.com › direct-bonded-copper-substrate
May 21, 2024 — Direct bonded copper substrate offers superior thermal conductivity and mechanical strength in semiconductor technology.
Direct Bond Copper (DBC) Ceramic Substrate
XIAMEN MASCERA TECHNOLOGY CO.,LTD.
https://www.mascera-tec.com › news › ceramic-substrat...
XIAMEN MASCERA TECHNOLOGY CO.,LTD.
https://www.mascera-tec.com › news › ceramic-substrat...
Jun 22, 2023 — DBC substrates have excellent thermal conductivity. In the operation of IGBT modules, a significant amount of heat is generated on the chip ...Read more
Direct-Bond-Copper Aluminum Nitride
coolingzone
https://www.coolingzone.com › pdf-article › Direc...
coolingzone
https://www.coolingzone.com › pdf-article › Direc...
PDF
In the cooling setup of conventional. IGBT modules, the top face of the chip is usually kept open for wire-bonding and electrical interconnections, while the ...Read more
MCC's Newest IGBT Offers Compact Power with Maximum ...
Micro Commercial Components
https://solutions.mccsemi.com › news › mccs-newest-ig...
Micro Commercial Components
https://solutions.mccsemi.com › news › mccs-newest-ig...
Aug 26, 2025 — The robust, SOT-227 compatible GJ package features an isolated copper baseplate with Direct Bonded Copper (DBC) technology, providing excellent ...Read more
Scholarly articles for Direct Bonded Copper IGBT | |
… direct bonding copper degradation monitoring method … - Zhang - Cited by 5 … bonds on the electrical switching behaviour of IGBTs - Mannmeusel - Cited by 22 … and measurements of IGBT power modules: transient … - He - Cited by 39 | |
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