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Active Metal Brazing (AMB) ceramic substrates join ceramic (e.g.,
, AlN,
) to thick copper (up to 800 µm) using active alloy fillers containing titanium. This method forms a high-strength chemical bond suitable for high-power electronics, providing excellent heat dissipation, high ampacity, and structural reliability in automotive, renewable energy, and traction applications.
Key Features of AMB Ceramic Substrates
- Bonding Process: Active metals like Titanium (Ti), Zirconium (Zr), or Vanadium (V) react directly with the ceramic surface, eliminating the need for prior metallization.
- High Reliability: AMB is often favored for high-power modules (e.g., electric vehicles) over Direct Bond Copper (DBC) due to superior thermal cycling reliability, especially with Silicon Nitride ().
- Materials: Common ceramic materials include (high toughness), Aluminum Nitride (AlN, high thermal conductivity), and Alumina (, cost-effective).
- Copper Thickness: Allows for thick copper layers (µm), offering very high current carrying capacity.
Active Metal Brazing Process (AMB)
- Preparation: Ceramic and metal layers are cleaned, often via plasma, to remove surface contaminants.
- Brazing Alloy Selection: Typically uses Active Metal filler alloys such as Ag-Cu-Ti (for ) or Cu-Sn-Ti/Cu-Ni-Ti (for AlN/).
- Vacuum Heating: The assembly is heated to °C–°C in a vacuum or inert gas atmosphere.
- Reaction Layer: The active element (e.g., Ti) reacts with the ceramic to form a compound layer (e.g., Titanium Nitride on ), allowing the liquid braze to wet the surface.
Advantages
- Exceptional Heat Management: Combines excellent heat conductivity of ceramic with high heat capacity of thick copper.
- High Mechanical Strength: Strong adhesion between metal and ceramic, ideal for harsh thermal environments.
- Customization: Tailorable circuit layouts similar to PCBs.
Typical Applications
- Automotive power modules (EVs/HEVs).
- Windmill turbines and renewable energy inverters.
- High-voltage DC transmission.
- Railway traction systems.
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Web results
What is AMB (Active Metal Braze) Ceramic PCB?
bstceramicpcb.com
https://www.bstceramicpcb.com › what-is-amb-ceramic-p...
bstceramicpcb.com
https://www.bstceramicpcb.com › what-is-amb-ceramic-p...
AMB substrate is based on the chemical reaction of ceramic and active metal at high temperature to achieve the combination, so it has higher bonding strength ...Read more
What is Active Metal Brazing (AMB) Ceramic Substrate?
Xiamen Wintrustek Advanced Materials Co., Ltd.
https://www.wintrustek.com › new › What-is-Active-Met...
Xiamen Wintrustek Advanced Materials Co., Ltd.
https://www.wintrustek.com › new › What-is-Active-Met...
Sep 26, 2025 — AMB is the most recent advancement in ceramic substrates and provides the capability of producing heavy copper using either silicon nitride ( ...Read more
Active Metal Brazing
Rogers Corporation
https://www.rogerscorp.com › technical-expertise › activ...
Rogers Corporation
https://www.rogerscorp.com › technical-expertise › activ...
Our curamik® Active Metal Brazed (AMB) substrates consist of a ceramic isolator, Si3N4 (silicon nitride), onto which pure copper is brazed in a high temperature ...Read more
Ceramic Substrate Series-Performance and Application of ...
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...
Jul 26, 2023 — Active Metal Brazing (AMB) is an advancement of the DBC process. It involves adding a small amount of active elements (e.g., Ti, Zr, V, Cr) to ...Read more
What is active metal brazing? - TWI
twi-global.com
https://www.twi-global.com › technical-knowledge › faqs
twi-global.com
https://www.twi-global.com › technical-knowledge › faqs
In active metal brazing, a metal (usually titanium) is added to the braze alloy to promote reaction and wetting with a ceramic substrate.Read more
Active Metal Brazing (AMB) Technology Ceramic Substrates
semi-el.com
https://semi-el.com › products › active-metal-brazing-amb
semi-el.com
https://semi-el.com › products › active-metal-brazing-amb
The brazing process involves applying a thin layer of a specialized active metal alloy to the ceramic substrate surface, which is then heated to a high ...Read more
What is Active Metal Brazing AMB Ceramic PCB?
EBest Circuit
https://www.bestpcbs.com › Home › 2025 › November
EBest Circuit
https://www.bestpcbs.com › Home › 2025 › November
Nov 6, 2025 — Active metal brazing (AMB) has become a cornerstone technology for bonding ceramics to metals in high-demand industries.
Large Area Active Brazing of Multi-tile Ceramic-Metal Structures
dtic.mil
https://apps.dtic.mil › sti › pdfs › ADA562512
dtic.mil
https://apps.dtic.mil › sti › pdfs › ADA562512
PDF
by KJ Doherty2012Cited by 3 — This study will introduce pyramidal core structures as one of many possible interlayers between ceramic tiles and metal substrates. The processing techniques to ...Read more
Active Metal Brazing (AMB) Technology Ceramic Substrates
Fujian Huaqing Electronic Material Technology Co.,Ltd
https://www.huaqingcn.com › active-metal-brazing-amb-...
Fujian Huaqing Electronic Material Technology Co.,Ltd
https://www.huaqingcn.com › active-metal-brazing-amb-...
AMB(Active Metal Brazing Substrate) is the further development of DBC technology. It is a method to use a small amount of active elements such as Ti and Zr ...Read more
Ceramic Brazing
AZoM
https://www.azom.com › article
AZoM
https://www.azom.com › article
Nov 29, 2001 — The active elements used for this process include Ti, Zr, Hf, V and Al. The best known of these active elements is Ti, which is used in many ...Read more
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