Material · Lithography & Materials
Sapphire
Single-crystal aluminium oxide used as a substrate for gallium nitride LED epitaxy and for silicon-on-sapphire RF devices. It is transparent, hard and lattice-mismatched enough to require careful buffer layers.
- Also known as
- Al2O3 substrate
- Type
- Material
- Domain
- Lithography & Materials, Compound and advanced substrates
Notes
Still the volume substrate for general lighting LEDs despite its poor thermal conductivity.
Related terms
Part of the Lithography & Materials glossary, with every term in the topic and the lifecycles, tools and standards that use them.
Where it appears on the Hub
Used on 3 pages of the Hub. In each group, the pages that mention it most come first.
Lifecycle stages and gates
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Last reviewed: not yet reviewed in depth. Entry last updated . The full glossary