Aluminum Coated Thin Film Disk

Aluminum Coated Thin Film Disk is a precision-engineered substrate featuring a thin aluminum layer applied to a polymeric or glass base, designed for superior optical reflectivity, corrosion resistance, and electrical conductivity. Advanced coating processes, such as medium frequency pulsed sputtering, ensure a uniform, adherent aluminum barrier that minimizes pinholes and prevents substrate contamination. The aluminum layer can be optimized to improve water vapor resistance and reduce ion migration, critical for data storage media, precision optics, and high-sensitivity sensor systems. Common applications include magnetic and optical data storage disks, calibration standards in spectroscopy, and reflective elements in optical instrumentation. Specific technologies benefit from enhanced surface smoothness and stability, such as high-density magnetic recording and precision interferometry. Research efforts focus on refining coating uniformity, barrier performance, and adhesion durability under thermal and mechanical stress. Aluminum Coated Thin Film Disk remains a vital material in both industrial production and scientific research, bridging performance demands in electronics, optics, and data technologies.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Coated Thin Film

Thickness		±30%

Disk

Diameter		±20%

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	13
Crystal structure	Face centred cubic
Electronic structure	Ne 3s² 3p¹
Valences shown	3
Atomic weight( amu )	26.98154
Thermal neutron absorption cross-section( Barns )	0.232
Photo-electric work function( eV )	4.2
Atomic radius - Goldschmidt( nm )	0.143
Ionisation potential( No./eV )	4/ 120
Ionisation potential( No./eV )	5/ 154
Ionisation potential( No./eV )	6/ 190
Ionisation potential( No./eV )	1/ 5.99
Ionisation potential( No./eV )	3/ 28.4
Ionisation potential( No./eV )	2/ 18.8

Mechanical Properties

Element	Value
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.345
Poisson's ratio	0.345
Bulk modulus( GPa )	75.2
Bulk modulus( GPa )	75.2
Tensile modulus( GPa )	70.6
Tensile modulus( GPa )	70.6
Hardness - Vickers( kgf mm⁻² )	21
Hardness - Vickers( kgf mm⁻² )	35-48
Tensile strength( MPa )	130-195
Tensile strength( MPa )	50-90
Yield strength( MPa )	110-170
Yield strength( MPa )	Oct-35

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	2.67@20@20°C
Superconductivity critical temperature( K )	1.175
Temperature coefficient( K⁻¹ )	0.0045@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.42

Physical Properties

Element	Value
Boiling point( C )	2467
Density( gcm⁻³ )	2.7@20°C

Thermal Properties

Element	Value
Melting point( C )	660.4
Latent heat of evaporation( J g⁻¹ )	10800
Latent heat of fusion( J g⁻¹ )	388
Specific heat( J K⁻¹ kg⁻¹ )	900@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	237@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	23.5@0-100°C