Definition of AAO (Anodized Aluminium Oxide)
Anodizing is a type of metal surface treatment technology.
Metal surface treatment refers to a technology that physically and chemically corrodes metals and non-metals or changes surface properties to improve the appearance, durability, and functionality of materials and parts without changing the characteristics of the raw materials.
Anodizing refers to the process of electrochemically oxidizing a metal surface to form a nanoporous film with many holes, and using aluminum as the anode in an electrolyte and passing electricity through it is called aluminum anodization.
In the process of aluminum anodization, the aluminum surface is oxidized by oxygen generated at the anode to form an aluminum oxide film, which is called 'anodized aluminum AAO (Anodized Aluminium Oxide)'.
Large-Area AAO
Anodizing Technology
Definition of AAO (Anodized Aluminium Oxide)
Anodizing is a type of metal surface treatment technology.
Metal surface treatment refers to a technology that physically and chemically corrodes metals and non-metals or changes surface properties to improve the appearance, durability, and functionality of materials and parts without changing the characteristics of the raw materials.
Anodizing refers to the process of electrochemically oxidizing a metal surface to form a nanoporous film with many holes, and using aluminum as the anode in an electrolyte and passing electricity through it is called aluminum anodization.
In the process of aluminum anodization, the aluminum surface is oxidized by oxygen generated at the anode to form an aluminum oxide film, which is called 'anodized aluminum AAO (Anodized Aluminium Oxide)'.
AAO has two types
well type with a barrier layer blocking the bottom and through-hole type including through holes.
Characteristics of AAO
Technology > Large-Area AAO
Anodizing Technology
※ Source : colloidal and polymer science,
25 sep 2020, volume 299, 325-341
toolbox of porous anodic aluminum
oxide–based nanocomposites : from
preparation to application
AAO is known to be able to control pore size, barrier thickness, and interpore distance by controlling applied voltage, temperature, purity of raw material aluminum, and anodizing process.
※ Source : Nanomaterials 2023, 13(21), 2853 Advances
in the Fabrication of Nanoporous Anodic Aluminum Oxide and Its Applications to Sensors : A Review
Problems with Manufacturing Methods and
Products of current technology
Non-uniformity
After 1st Anodizing, the pores are not formed uniformly, so it is a generally known working method to remove them by etching and perform 2nd Anodizing, but even after 2nd Anodizing, the uniformity of the pore size is low.
Instability
Due to the characteristics of metal oxides, they are easily broken and lack flexibility, making them difficult to handle, and in many cases, they cannot be applied in the application product development process.
High Price
Only one membrane is manufactured from one Al substrate, and since it is easily broken and difficult to handle, large-area manufacturing is difficult, so the selling price is very high.
AAO has two types
well type with a barrier layer blocking the bottom and through-hole type including through holes.
Characteristics of AAO
Technology > Large-Area AAO Anodizing Technology
AAO is known to be able to control pore size, barrier thickness, and interpore distance by controlling applied voltage, temperature, purity of raw material aluminum, and anodizing process.
Problems with Manufacturing Methods and Products of current technology
Non-uniformity
After 1st Anodizing, the pores are not formed uniformly, so it is a generally known working method to remove them by etching and perform 2nd Anodizing, but even after 2nd Anodizing, the uniformity of the pore size is low.
Instability
Due to the characteristics of metal oxides, they are easily broken and lack flexibility, making them difficult to handle, and in many cases, they cannot be applied in the application product development process.
High Price
Only one membrane is manufactured from one Al substrate, and since it is easily broken and difficult to handle, large-area manufacturing is difficult, so the selling price is very high.
Secured large-area AAO manufacturing technology and at the same time
possesses AAO manufacturing technology that is unbreakable and flexible
Secured large-area AAO manufacturing technology and at the same time possesses AAO manufacturing technology that is unbreakable and flexible
Physical Properties of Hexapro’s AAO
AAO manufactured by Hexapro's method is large-area and has good pore uniformity.
X150,000
X100,000
X200,000
X100,000
X100,000
X200,000
Hexapro AAO pore uniformity is very high compared to competitors' products.
AAO manufactured by Hexapro's method is amorphous.
AAO manufactured by Hexapro's manufacturing method has many pores and low dielectric constant.
Large-Area AAO
Anodizing Technology
Physical Properties of Hexapro’s AAO
AAO manufactured by Hexapro's method is large-area and has good pore uniformity.
X150,000
X100,000
X200,000
X100,000
X100,000
X200,000
Hexapro AAO pore uniformity is very high compared to competitors' products.
AAO manufactured by Hexapro's method is amorphous.
Large-Area AAO
Anodizing Technology
AAO manufactured by Hexapro's manufacturing method has many pores and low dielectric constant.
| Dielectric Constant | Dielectric Loss | ||||||
| Other Companies | Hexapro AAO | Other Companies | Hexapro AAO | ||||
Al2O3 powder | AAO Membrane (Al 95%) | AAO Membrane (Al 99.999%) | AAO powder (Al 99.5%) | Al2O3 powder | AAO Membrane (Al 95%) | AAO Membrane (Al 99.999%) | AAO powder (Al 99.5%) |
| 7.569 | 2.204 | 1.845 | 2.005 | 0.002 | 0.005 | 0.013 | 0.015 |
| 7.925 | 2.225 | 1.845 | 2.016 | 0.006 | 0.003 | 0.018 | 0.021 |
| 8.345 | 2.232 | 1.833 | 2.023 | 0.009 | 0.005 | 0.014 | 0.020 |
| 8.823 | 2.185 | 1.832 | 1.998 | 0.019 | 0.006 | 0.020 | 0.030 |
| 8.710 | 2.201 | 1.785 | 2.026 | 0.018 | 0.019 | 0.034 | 0.038 |
Secured technology to apply constant voltage and current to large-area aluminum during the anodizing process for large-area AAO manufacturing.
Secured mass production technology for sizes of 20cm x 20cm and larger Bench-scale technology secured
Existing technology: Large-area manufacturing impossible Hexapro technology: Large-area manufacturing technology secured"
(Left - Failure)
With existing methods, there's an issue where the entire aluminum surface does not get anodized uniformly.
(Right - Success)
Hexapro has secured the technology to anodize an entire 20 x 20cm aluminum surface uniformly without damage.
Secured technology to apply constant voltage and current to large-area aluminum during the anodizing process for large-area AAO manufacturing.
Secured mass production technology for sizes of 20cm x 20cm and larger Bench-scale technology secured
Existing technology: Large-area manufacturing impossible Hexapro technology: Large-area manufacturing technology secured
(Left - Failure)
With existing methods, there's an issue where the entire aluminum surface does not get anodized uniformly.
(Right - Success)
Hexapro has secured the technology to anodize an entire 20 x 20cm aluminum surface uniformly without damage.
Corporate name Hexapro Co., Ltd.
CEO Kim Taesun
Personal Information Manager Kim Taesun
Head office 533, 55 Hanyang University Road, Sangnok-gu, Ansan-si, Gyeonggi-do, Korea
Research Center/Factory 105, 253-5 Wonsi-ro, Danwon-gu, Ansan-si, Gyeonggi-do, Korea
TEL 02-6497-3450
E-MAIL manager@hexapro.co.kr
COPYRIGHT (C) HEXAPRO. All Rights reserved
Corporate name Hexapro Co., Ltd.
CEO Kim Taesun Personal Information Manager Kim Taesun
Head office 533, 55 Hanyang University Road, Sangnok-gu, Ansan-si, Gyeonggi-do, Korea
Research Center/Factory 105, 253-5 Wonsi-ro, Danwon-gu, Ansan-si, Gyeonggi-do, Korea
TEL 02-6497-3450 E-MAIL manager@hexapro.co.kr
COPYRIGHT (C) HEXAPRO. All Rights reserved
