CN102595834A - 壳体及其制造方法 - Google Patents
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- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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Abstract
一种壳体,包括铝或铝合金基体,形成于该铝或铝合金基体表面的色彩层,所述色彩层包括依次形成于铝或铝合金基体表面的铝层和氧化铝层,该色彩层呈现的色度区域于CIE LAB表色系统的L*坐标值介于75至100之间,a*坐标值介于-1至1之间,b*坐标值介于-1至1之间。本发明还提供了所述壳体的制造方法,包括以下步骤:提供铝或铝合金基体;在该铝或铝合金基体上磁控溅射色彩层;所述色彩层包括依次形成于铝或铝合金基体表面的铝层和氧化铝层;所述壳体具有良好的耐磨性及装饰性外观。
Description
技术领域
本发明涉及一种壳体及其制造方法。
背景技术
随着科技的不断进步,手机、个人数字助理(PDA,PersonalDigital Assistant)、及计算机等各式电子装置也迅速发展,其功能亦愈来愈丰富。为了使电子装置的外壳具有丰富色彩,传统上可利用彩色塑料形成彩色塑料外壳,或藉由喷漆方式在电子装置的壳体表面形成色料层。然而,塑料外壳与喷漆外壳不能呈现良好的金属质感。另一方面,由于真空镀膜技术本身较为复杂而不易精密操控,现有技术中于壳体表面形成的金属真空镀膜层的色彩有限,与烤漆、阳极处理等工艺相比,真空镀膜层的颜色不够丰富,限制了其在装饰镀膜领域的竞争力。同时通过PVD溅镀的色彩膜层的耐磨性能普遍不佳,从而在使用中会发生壳体异色、脱落等现象,难以维持长久良好的装饰外观。
发明内容
鉴于此,提供一种具有良好耐磨性及装饰性外观的壳体。
另外,还提供一种上述壳体的制造方法。
一种壳体,包括铝或铝合金基体,形成于该铝或铝合金基体表面的色彩层,所述色彩层包括依次形成于铝或铝合金基体表面的铝层和氧化铝层,该色彩层呈现的色度区域于CIE LAB表色系统的L*坐标值介于75至100之间,a*坐标值介于-1至1之间,b*坐标值介于-1至1之间。
一种壳体的制造方法,包括以下步骤:
提供铝或铝合金基体;
于该铝或铝合金基体上形成铝层;
于铝层表面磁控溅射形成氧化铝层。
所述色彩层呈现的色度区域于CIE LAB表色系统的L*坐标值介于75至100之间,a*坐标值介于-1至1之间,b*坐标值介于-1至1之间。
所述壳体的制造方法,通过磁控溅射法依次于铝或铝合金基体上形成具有装饰性的色彩层。所述色彩层包括依次形成于铝或铝合金基体表面的铝层和氧化铝层,在铝或铝合金基体上形成铝层可呈现出浅白色,之后,再于该铝层上形成一氧化铝层,该氧化铝层可在较宽的波长范围内呈现一种半透明效果,而且该氧化铝层还具有高耐磨性,可避免所述色彩层发生脱落等失效现象,从而使该壳体经长时间使用后仍具有较好的装饰性外观。
附图说明
图1为本发明较佳实施例的壳体的剖视图。
图2是图1壳体的制作过程中所用镀膜机结构示意图。
主要元件符号说明
壳体 10
铝或铝合金基体 11
色彩层 13
铝层 131
氧化铝层 133
镀膜机 100
镀膜室 20
真空泵 30
轨迹 21
靶材 22
气源通道 24
具体实施方式
请参阅图1,本发明一较佳实施例的壳体10包括铝或铝合金基体11、及形成于该铝或铝合金基体11上的色彩层13。该壳体10可以为3C电子产品的壳体,也可为工业、建筑用件及汽车等交通工具的零部件等。
所述色彩层13包括铝层131和氧化铝层133,所述铝层131直接形成于铝或铝合金基体11的表面,所述氧化铝层133形成于铝层131的表面。所述铝层131的厚度为1.0~3.0μm;所述氧化铝层133的厚度为0.5~1.0μm。
所述色彩层13通过磁控溅射法沉积形成。
所述色彩层13呈现白色,其色度区域于CIE LAB表色系统的L*坐标值介于75至100之间,a*坐标值介于-1至1之间,b*坐标值介于-1至1之间。
本发明一较佳实施例的制造所述壳体10的方法主要包括如下步骤:
提供铝或铝合金基体11,并对铝或铝合金基体11依次进行研磨及电解抛光。电解抛光后,再依次用去离子水和无水乙醇对该铝或铝合金基体11表面进行擦拭。再将擦拭后的铝或铝合金基体11放入盛装有丙酮溶液的超声波清洗器中进行震动清洗,以除去铝或铝合金基体11表面的杂质和油污等。清洗完毕后吹干备用。
对经上述处理后的铝或铝合金基体11的表面进行氩气等离子清洗,进一步去除铝或铝合金基体11表面的油污,以改善铝或铝合金基体11表面与后续涂层的结合力。
提供一镀膜机100,镀膜机100包括一镀膜室20及一用于对该镀膜室20抽真空的真空泵30,该镀膜室20内设有转架(未图示),将基体11固定于转架上,转架带动基材11沿圆形轨迹21转动,且基材11在沿轨迹21运行时亦自转。在该镀膜室20侧壁上安装二靶材22,该二靶材22关于轨迹21的中心相对称。在二靶材22的两端设有气源通道24,气体经由该气源通道24吹出轰击二靶材22的表面,,以使靶材表面溅射出粒子。当基材11通过二靶材22之间时,将镀上二靶材22表面溅射的粒子,完成磁控溅射过程。
该等离子清洗的具体操作及工艺参数可为:对该镀膜室20进行抽真空处理至真空度为8.0×10-3Pa,以300~500sccm(标准状态毫升/分钟)的流量向镀膜室20内通入纯度为99.999%的氩气(工作气体),于铝或铝合金基体11上施加-300~-750V的偏压,在所述镀膜室20中形成高频电压,使所述氩气离子化而产生氩气等离子体对铝或铝合金基体11的表面进行物理轰击,而达到对铝或铝合金基体11表面清洗的目的。对铝或铝合金基体11表面进行氩气等离子体清洗,清洗时间为3~10min。
在对铝或铝合金基体11进行氩气等离子体清洗后,在该铝或铝合金基体11上形成色彩层13。首先形成所述色彩层13中的铝层131。形成该铝层131的具体操作及工艺参数如下:以氩气为工作气体,调节氩气流量为100~300sccm,于铝或铝合金基体11上施加-50~-200V的偏压,设置偏压的占空比为30%~75%,并加热镀膜室至100~150℃(即溅射温度为100~150℃);选择铝靶材22,设置其功率为8~13kw,沉积铝层13。沉积该铝层131的时间为10~30min。
形成铝层131后,在该铝层131上形成氧化铝层133,以氩气为溅射气体,设置氩气流量为100~200sccm,以氧气为反应气体,设置氧气流量为150~200sccm,设置偏压的占空比为30%~50%,对铝和铝合金基体11施加-50~-100V的偏压,并加热镀膜室至100~150℃;选择铝为靶材,设置其功率为8~13kw,沉积氧化铝层133。沉积氧化铝层133的时间为30~60min。控制氧化铝层133的厚度为0.5~1.0μm。
以下结合具体实施例对壳体10的制备方法及壳体10进行说明:
实施例1
等离子清洗:氩气流量为300sccm,铝或铝合金基体11的偏压为-300V,等离子清洗的时间为10分钟;
溅镀铝层131:通入氩气150sccm,设置铝靶22功率为10kw,设置铝或铝合金基体11的偏压为200V,沉积90min;
溅镀氧化铝层133:其工艺参数为:以氩气为工作气体,其流量为150sccm,以氧气为反应气体,设置氧气的流量为50sccm,在铝或铝合金基体上施加-200V的偏压,沉积时间为60min。
实施例2
等离子清洗:氩气流量为300sccm,铝或铝合金基体11的偏压为-300V,等离子清洗的时间为分钟10;
溅镀铝层131:通入氩气150sccm,设置铝靶22功率为10kw,设置铝或铝合金基体11的偏压为-200V,沉积90min;
溅镀氧化铝层133:以氩气为工作气体,其流量为150sccm,以氧气为反应气体,设置氧气的流量为100sccm,在铝或铝合金基体上施加-200V的偏压,沉积时间为60min。
实施例3
等离子清洗:氩气流量为300sccm,铝或铝合金基体11的偏压为-300V,等离子清洗的时间为分钟10min;
溅镀铝层131:通入氩气150sccm,设置铝靶22的功率为10kw,设置铝或铝合金基体11的偏压为-200V,沉积分钟90min;
溅镀氧化铝层133:以氩气为工作气体,其流量为150sccm,以氧气为反应气体,设置氧气的流量分别为75sccm,在铝或铝合金基体上施加200V的偏压,沉积时间为60min。
所述壳体10的制造方法,通过磁控溅射法依次于铝或铝合金基体上形成具有装饰性的色彩层13。所述色彩层13包括依次形成于铝或铝合金基体11表面的铝层131和氧化铝层133,在铝或铝合金基体11上形成铝层131可呈现出浅白的颜色,之后,再于该铝层131上形成一氧化铝层133,该氧化铝层133可在较宽的波长范围内呈现一种半透明效果,而且该氧化铝层133还具有高耐磨性。在提高所述壳体装饰效果的同时,还可避免所述色彩发生异色、脱落等失效现象,从而使该壳体10经长时间使用后仍具有较好的装饰性外观。
Claims (7)
1.一种壳体,包括铝或铝合金基体,形成于该铝或铝合金基体表面的色彩层,其特征在于:所述色彩层包括依次形成于铝或铝合金基体表面的铝层和氧化铝层,所述色彩层呈现白色,其色度区域于CIE LAB表色系统的L*坐标值介于75至100之间,a*坐标值介于-1至1之间,b*坐标值介于-1至1之间。
2.如权利要求1所述的壳体,其特征在于:所述铝层的厚度为1.0~3.0μm。
3.如权利要求1所述的壳体,其特征在于:所述氧化铝层的厚度为0.5~1.0μm。
4.如权利要求1所述的壳体,其特征在于:所述色彩层以磁控溅射镀膜法形成。
5.一种壳体的制造方法,包括以下步骤:
提供铝或铝合金基体;
于该铝或铝合金基体上磁控溅射铝层;
于铝层表面磁控溅射氧化铝层,形成包括该铝层及氧化铝层的色彩层;
所述色彩层呈现白色,其色度区域于CIE LAB表色系统的L*坐标值介于75至100之间,a*坐标值介于-1至1之间,b*坐标值介于-1至1之间。
6.如权利要求5所述的壳体的制造方法,其特征在于:磁控溅射所述铝层的工艺参数为:以氩气为工作气体,其流量为100~300sccm,于铝或铝合金基体上施加-100~-200V的偏压,设置偏压的占空比为30%~75%,以铝为靶材,设置其功率为8~10kw,溅射温度为150~250℃,溅射时间为60~90min。
7.如权利要求5所述的壳体的制造方法,其特征在于:磁控溅射所述氧化铝层的工艺参数为:设置氩气流量为100~300sccm,以氧气为反应气体,设置氧气流量为50~100sccm,设置偏压的占空比为为30~75%,对基体施加150~250V的偏压,选择铝为靶材,设置其功率为8~10kw,沉积氧化铝层的时间为30~90min。
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CN105744782A (zh) * | 2016-03-14 | 2016-07-06 | 联想(北京)有限公司 | 一种电子设备及电子设备的金属壳体的制成方法 |
CN106670059A (zh) * | 2017-03-13 | 2017-05-17 | 信利光电股份有限公司 | 电子产品外壳及其制作方法 |
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CN101338430A (zh) * | 2008-06-26 | 2009-01-07 | 高鸿镀膜科技(浙江)有限公司 | 一种手机外壳着黑的制备方法 |
CN101830092A (zh) * | 2009-03-13 | 2010-09-15 | 中国科学院福建物质结构研究所 | 一种耐腐蚀的彩色装饰膜的制备方法 |
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CN101338430A (zh) * | 2008-06-26 | 2009-01-07 | 高鸿镀膜科技(浙江)有限公司 | 一种手机外壳着黑的制备方法 |
CN101830092A (zh) * | 2009-03-13 | 2010-09-15 | 中国科学院福建物质结构研究所 | 一种耐腐蚀的彩色装饰膜的制备方法 |
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CN105744782A (zh) * | 2016-03-14 | 2016-07-06 | 联想(北京)有限公司 | 一种电子设备及电子设备的金属壳体的制成方法 |
CN106670059A (zh) * | 2017-03-13 | 2017-05-17 | 信利光电股份有限公司 | 电子产品外壳及其制作方法 |
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