The substrate does more than support copper
The ceramic provides electrical insulation and mechanical support, and can form an important thermal path. Which properties matter depends on grade, geometry and construction. Ceramic does not mean every board is exceptionally thermally conductive: an LTCC glass-ceramic system and an AlN power carrier have different priorities.
Materials and processes are different classifications
Alumina, aluminum nitride and silicon nitride name material families. DBC, DPC and AMB name metallization or joining routes. Thick film and thin film describe circuit-forming technologies; LTCC and HTCC describe co-fired multilayer systems. Specify both the material and the construction to make a design meaningful.
Where ceramic earns its place
Ceramic can be useful for power carriers, LED boards, RF circuits, sensors, precision hybrids and packages. It also brings brittleness, process-specific design rules and different costs from organic laminates. Compare the complete system with conventional alternatives before selecting the platform.
Engineering example
“AlN, 0.635 mm ceramic, plated copper circuit, specified pad finish” conveys more useful information than “high-performance ceramic PCB.” The remaining conductor, geometry and test details still need to be defined.
Before you release the design
- Identify the function the ceramic must provide.
- Specify material and process separately.
- Compare the complete assembled construction.
Sources and further technical reading
Manufacturer references support the material and process context. Worked examples and checklists are engineering guidance; they are not test results or supplier guarantees.