US 2024/0384431 A1Published application

Method for colorizing aluminum-containing object and colorized aluminum-containing object therefrom

AssigneeJabil Circuit (Singapore) Pte. Ltd.

InventorsYi-Chung Su, Pen-Yi Liao, Chih-Hao Chen, Wen-Chia Tsai

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Abstract

A method for colorizing an aluminum-containing object includes the steps of: (a) subjecting the aluminum-containing object to a first pretreatment, so as to remove contaminants from a surface thereof; and (b) subjecting the pretreated aluminum-containing object obtained in step (a) to an anodizing treatment which is accomplished by applying N cycles of periodic current signals, thereby forming an aluminum oxide film with a plurality of nanopores on the surface of the aluminum-containing object. In step (b), each cycle of the periodic current signals includes a first to fourth predetermined time periods. A colorized aluminum-containing object prepared by the aforesaid method is also provided.

Claims9

Dependent claims

A method for colorizing an aluminum-containing object, comprising:

(a) subjecting the aluminum-containing object to a first pretreatment, so as to remove contaminants from a surface of the aluminum-containing object;
and
(b) subjecting the pretreated aluminum-containing object obtained in step (a) to an anodizing treatment which is accomplished by applying N cycles of periodic current signals, thereby forming an aluminum oxide film with a plurality of nanopores on the surface of the aluminum-containing object;
wherein in step (b), each cycle of the periodic current signals includes a first predetermined time period in which a first constant current density is applied, a second predetermined time period in which the first constant current density decreases to a second constant current density at a decreasing rate of current density, a third predetermined time period in which the second constant current density is applied, and a fourth predetermined time period in which the second constant current density rapidly increases to the first constant current density at an increasing rate of current density.

1 more element

A colorized aluminum-containing object, comprising:

an aluminum-containing object;
and
an aluminum oxide film which has a number M of film bodies sequentially stacked on a surface of the aluminum-containing object, and a plurality of photonic crystals distributed within each of the film bodies, each of the photonic crystals having a first pore structure, a second pore structure, a plurality of third pore structures, and a fourth pore structure in sequence along a first horizontal direction, the first horizontal direction being a direction from the film bodies toward the surface of the aluminum-containing object;
wherein the first pore structure of each of the photonic crystals is a nanopore having an equal diameter and extending along the first horizontal direction;
wherein the second pore structure of each of the photonic crystals is a nanopore being in communication with the first pore structure of the same photonic crystal, and having a decreasing diameter that gradually tapers and extends along the first horizontal direction;
wherein the plurality of third pore structures of each of the photonic crystals extend along the first horizontal direction, and are spaced apart from each other along a second horizontal direction perpendicular to the first horizontal direction;
and
wherein the fourth pore structure of each of the photonic crystals extends along the first horizontal direction.

5 more elements

Dependencies are inferred from the claim text.