Magnesium Oxide Single Crystal Substrate (MgO Substrate)

• High-purity single-crystal magnesium oxide

• Cubic crystal structure with a well-defined lattice constant

• Excellent thermal stability

• High electrical resistivity

• Suitable for epitaxial thin-film deposition

• Common substrate for superconducting and functional oxide films

• Multiple crystallographic orientations available

• Single-side polished and double-side polished options

• Custom dimensions, thicknesses, and surface finishes may be available

• COA and material documentation available as applicable

Property	Typical Information
Chemical Name	Magnesium Oxide
Chemical Formula	MgO
CAS Number	1309-48-4
Molecular Weight	40.30 g/mol
Crystal Structure	Cubic
Lattice Constant	Approximately 4.21 Å
Density	3.58 g/cm³
Melting Point	Approximately 2,852°C
Purity	99.95%–99.99%+
Electrical Properties	Electrical insulator
Crystal Orientations	(100), (110), (111)
Surface Finish	Single-side polished (SSP) or double-side polished (DSP)
Typical Dimensions	5 × 5 mm, 10 × 10 mm, 15 × 15 mm, 20 × 20 mm; custom
Typical Thickness	0.5 mm, 1.0 mm; custom
Applications	Epitaxy, thin films, semiconductor research, electronic materials

• MgO (100) Single Crystal Substrate

• MgO (110) Single Crystal Substrate

• MgO (111) Single Crystal Substrate

• High-Purity MgO Single Crystal Substrate

• Single-Side Polished MgO Substrate

• Double-Side Polished MgO Substrate

• Epitaxy-Grade MgO Substrate

• Semiconductor Research-Grade MgO Substrate

• Custom MgO Single Crystal Substrate

1. What is a magnesium oxide single crystal substrate?

A magnesium oxide single crystal substrate is a crystalline MgO wafer or plate used as a base for depositing or growing thin films and crystalline materials.

2. What is MgO single crystal substrate used for?

It is used in epitaxial growth, superconducting thin films, functional oxide films, spintronics, semiconductor research, and advanced electronic materials development.

3. Which crystal orientations are available?

Common orientations include (100), (110), and (111). The best orientation depends on the deposited material, lattice relationship, and desired film properties.

4. Why is MgO used for epitaxial growth?

MgO offers a stable cubic crystal structure, high-temperature capability, electrical insulation, and lattice compatibility with selected oxide and functional materials.

5. What polishing options are available?

Single-side polished (SSP) and double-side polished (DSP) substrates may be available. Surface roughness and flatness requirements should be matched to the intended deposition process.

6. Can REG Metals supply custom MgO substrates?

REG Metals can source MgO single crystal substrates subject to availability. Customers should specify orientation, dimensions, thickness, purity, polishing requirements, surface roughness, and quantity when requesting a quotation.