CN103852886A - 电湿润元件及其制作方法 - Google Patents
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Abstract
一种电湿润元件,包括一基座、一与该基座连接并共同界定出一个密闭空间的封装壳,及一容设于该密闭空间的液体,该基座及该封装壳可彼此配合提供电能,该液体含有一磁性油墨与一极性溶液,且该液体在受到该基座及该封装壳提供的电能时会产生型态变化;另外,本发明还同时提供该电湿润元件的制作方法。借此,于封装过程中,借由一磁力单元与磁性油墨的作用而令磁性油墨朝向磁场方向均匀平铺固定,可减少该磁性油墨及极性溶液于封装时的干扰而增加封装的便利性及有效提升良率。
Description
技术领域
本发明涉及一种电湿润元件及其制作方法,特别是涉及一种具有高应答速度的电湿润元件及其制作方法。
背景技术
电湿润技术是一种借助控制电压来改变被包围的液体的表层电性,从而控制液体型态的变化,可利用在例如显示器、光学凹/凸流体透镜、生医芯片等产品中,其中电湿润显示器则是利用油和水产生画素开关的效果。由于电湿润显示器不需要偏光板和液晶,所以成本低且制程相对一般液晶显示器而言较为简单;此外,电湿润显示器还具有穿透度高、应答速度快及广视角的优点,因此更适合用于电子纸。
参阅图1、图2,传统电湿润显示元件包含一具有疏水性表面111的基座11、多个形成在该疏水性表面111的挡墙12、多个由该疏水性表面111与所述挡墙12共同界定的容槽13、一与该基座11配合封闭所述容槽13的封装座14,及一封置于所述容槽13的液体15,且该液体15具有一油性溶液151与一极性溶液152,要说明的是,该电湿润显示元件的油性溶液151与该极性溶液152的油/水界面于平衡时所呈现的态样,会因为该油性溶液151、极性溶液152及该挡墙12之间的相对关系而令该油/水界面呈现凸状或凹状,图1中仅为说明其中一种态样。
续参阅图1,该液体15具有一位于所述容槽13底部的油性溶液151与一位于该油性溶液151上的极性溶液152。于显示器中,该每一个容槽13即代表一个画素。该基座11及封装座14可相互配合提供电能,利用电压的控制,令该基座11的电性造成变化,进而控制容置于所述容槽13内的液体15的型态变化;例如,当该油性液体151为一有色油性油墨,该极性溶液152为水,在没有施加电压时,该油性溶液151于所述容槽13的接触面,会形成如图1所示的弧状液滴;当施加电压时,会改变所述疏水性挡墙12与该油性溶液151接触面的表面电性,而使得该油性溶液151与所述挡墙12接触面的表面张力产生改变,结果是原来的平衡静止况态不再稳定,原本呈弧状液滴状态的油性溶液151会被极性溶液152挤压移至两侧,形成如图2所示的像素变化,而产生画素开关的效果。
前述该电湿润显示器元件的液体15大多是以浸入式或喷墨式制程进行封装。以浸入式制程而言,是先在经过真空脱泡的水面形成一层油墨,再将该基座11缓慢斜插入水中,而令该油墨随着插入的基座11进入所述容槽13中,然后再于水中将该封装座14与该基座11贴合,而将该油墨及水一起封装于该每一个容槽13中;而喷墨式制程则是将油墨以喷墨方式填入所述容槽13中,接着再将填有该油墨的基座11浸入水中,再将该封装座14于水中与该基座11贴合而将该油墨及水一起封装于所述容槽13中。然而,无论是以浸入或喷墨式制程进行封装,由于该油性溶液151(如油墨)的比重小于水,因此于填装极性溶液152的过程若不慎搅动或破坏油/水之间的平衡,都会导致后续制程元件的良率降低,此外,目前该油性溶液151大都是将染料溶于非极性的溶剂(例如将黑色染料溶于油中)而得,而此类染料的稳定性较差,因此也会有元件寿命不长的问题。
发明内容
本发明的目的在于提供一种具有高应答速度的电湿润元件。
本发明的电湿润元件包含:一个封装座,及一液体。
该封装座包括一个基座及一个封装壳,该基座具有多个可容置液体的第一凹槽,该封装壳可与该基座共同界定出一个密闭空间,并与该基座配合施加电压。
该液体容设于该第一凹槽,包括一具有磁性的磁性油墨及一覆盖该磁性油墨的极性溶液,该液体在受到该基座及该封装壳施加电压时会产生型态变化,且该磁性油墨的型态变化不受其磁性影响。
本发明的电湿润元件,其中,该磁性油墨的组成份含有一磁性颜料及一非极性溶剂,该磁性颜料为顺磁性且为油溶性。
本发明的电湿润元件,其中,该磁性颜料的粒径不大于50nm。
本发明的电湿润元件,其中,该磁性颜料是表面具有疏水性基团改质的氧化铁。
本发明的电湿润元件,其中,该基座具有一本体、一形成于该本体表面的疏水层、一自该本体向上并穿过该疏水层向上延伸的第一挡墙,且该第一挡墙与该疏水层共同界定出所述第一凹槽。
本发明的电湿润元件,其中,该第一挡墙具有一自该本体向上并穿过该疏水层向上延伸的挡墙本体,及一形成于该挡墙本体表面与该疏水层连接的疏水膜。
本发明的电湿润元件,其中,该第一挡墙还具有一自该挡墙本体的顶面向上延伸的增高壁,该增高壁的宽度不大于该挡墙本体的宽度并具有亲水性表面。
本发明的电湿润元件,其中,该第一挡墙的疏水膜的高度小于该挡墙本体的高度。
本发明的电湿润元件,其中,该封装壳具有多个与所述第一凹槽位置相对应的第二凹槽,且所述第一凹槽、第二凹槽共同界定出多个供容置该液体的容置空间。
本发明的电湿润元件,其中,该封装壳具有一壳体,及一自该壳体表面延伸的第二挡墙,该第二挡墙具有亲水性表面,并与该壳体共同界定出所述第二凹槽。
本发明的另一目的在于提供一种具有高应答速度的电湿润元件的制作方法。
本发明的电湿润元件的制作方法包含一准备步骤,及一封装步骤。
该准备步骤包括准备一基座、一封装壳、一磁性油墨,及一个磁力单元,该磁力单元可产生磁力并与该磁性油墨相互作用,该基座具有多个可容置液体的第一凹槽,且该封装壳可与该基座共同界定出一个密闭空间,并可与该基座配合施加电压。
该封装步骤是将该磁性油墨装填于所述第一凹槽中,并利用该磁力单元的作用将该磁性油墨固定于所述第一凹槽底部,最后再将该磁性油墨与一极性溶液封置于该封装壳与该基座共同界定出的密闭空间,制得该电湿润元件。
本发明的电湿润元件的制作方法,其中,该该封装步骤是先将该磁性油墨以喷墨方式装填至所述第一凹槽,并利用该磁力单元的作用将该磁性油墨固定于所述第一凹槽,接着将该极性溶液填注于所述第一凹槽并覆盖该磁性油墨,最后将该封装壳与该基座贴合,将该磁性油墨与该极性溶液封置于该封装壳与该基座之间。
本发明的电湿润元件的制作方法,其中,该封装壳具有多个与所述第一凹槽位置相对应并可与所述第一凹槽共同界定出多个容置空间的第二凹槽,该封装步骤是将磁性油墨以喷墨方式装填至所述第一凹槽中,并将该极性溶液填注于所述第二凹槽,再将该基座与该封装壳贴合,令该磁性油墨与该极性溶液封置于所述容置空间。
本发明的电湿润元件的制作方法,其中,该磁性油墨的组成份为含有一磁性颜料及一非极性溶剂,该磁性颜料为具有顺磁性且表面为疏水性基团改质的氧化铁。
本发明的有益效果在于:借由该磁力单元与该磁性油墨的作用而令该磁性油墨朝向磁场方向均匀平铺固定,所以在封装的过程中该极性溶液较不易受到扰动而可良好的维持油/水之间的平衡,因此可减少现有电湿润元件于封装液体时,因为油、水密度差异所产生的制程难度,而可增加封装的操作便利性。
附图说明
图1是一种现有电湿润显示元件,且为未施加电压状态的示意图;
图2是辅助说明图1电湿润显示元件的剖视示意图,且为施加电压状态;
图3是本发明该第一较佳实施例的电湿润元件在完全未施加电压状态的剖视示意图;
图4是本发明该第一较佳实施例的另一态样中具有增高壁的电湿润元件的剖视示意图,且为施加电压状态;
图5是本发明电湿润元件的制作方法的该第一较佳实施例的流程图;
图6是辅助说明图5的流程示意图;
图7是说明本发明该第一较佳实施例制得的电湿润元件封装后的另一态样的剖视示意图;
图8是说明由该电湿润元件的制作方法的第二较佳实施例制作而得的电湿润元件,且为未施加电压的态样;
图9是说明该第二较佳实施例的流程图。
具体实施方式
下面结合附图及实施例对本发明进行详细说明。
本发明电湿润元件制作方法的第一较佳实施例,是用以制作如图3所示的电湿润元件,该电湿润元件可应用在液态透镜、显示器等不同的用途,在此,将该电湿润元件以应用于显示器为例作说明,惟本发明的应用并不以此为限。
参阅图3,图3所示为该第一较佳实施例制得的电湿润元件在未施加电压的状态,该电湿润元件包含一封装座2及一液体3。
该封装座2包括一基座21与一封装壳22。
该基座21具有一本体211、一形成于该本体211表面的疏水层212、一自该本体211表面向上并穿过该疏水层212延伸的第一挡墙213,及数个由该第一挡墙213与该疏水层212共同界定供容置该液体3的第一凹槽214,该第一挡墙213具有一挡墙本体215及一形成于该挡墙本体215表面由疏水性材料构成的疏水膜216。
要说明的是,该疏水膜216的高度可用来控制容置于所述第一凹槽214的疏水性油墨于所述第一凹槽214的侧边高度;疏水膜216愈高,疏水性油墨于所述第一凹槽214两侧边的高度愈高,留存于所述第一凹槽214底部的疏水性油墨就愈少,为了避免疏水性油墨因为该疏水膜216的高度过高而移向所述第一凹槽214两侧导致后续封装时溢过所述第一凹槽214,或是因为疏水性油墨向两侧边移动导致所述第一凹槽214底部的疏水性油墨量不足的问题,较佳地,该疏水膜216的高度小于所述第一凹槽214的高度。于图3中,该疏水膜216是以小于所述第一凹槽214的高度为例做说明。
该封装壳22与该基座21共同界定出一个密闭空间并封闭所述第一凹槽214,并与该基座21电连接以配合施加电压。由于该封装壳22的结构及材料为本技术领域所熟悉且非为本技术的重点,因此不再多加叙述,于本较佳实施例中,该封装壳22是以与该基座21共同界定出一可同时封闭所述第一凹槽214的密闭空间并为例作说明。
该液体3容置在所述第一凹槽214,在受到该基座21及该封装壳22施加的电压时会产生型态变化,包括一具有疏水性的磁性油墨31及一极性溶液32,且特别的是该磁性油墨31的组成份含有一磁性颜料及一非极性溶剂;较佳地,为了令该磁性油墨31可展现较好的色度,该磁性油墨31的磁性颜料粒径不大于50nm。于本实施例中,该磁性颜料是顺磁性且表面具有疏水性基团改质的氧化铁,该非极性溶剂是选自正己烷、12烷、18烷等长链烃类溶剂,及硅油,且该极性溶液32是水。此外,要说明的是,当该液体3在受到该基座21及该封装壳22施加电压而产生型态变化时,该磁性油墨31的型态变化不会受其磁性影响,而是受该磁性油墨31本身疏水性质的影响。
参阅图4(图4显示为当施加电压时该液体3的形态变化结果),要再说明的是,该第一挡墙213也可以是具有一自该本体211向上并穿过该疏水层212向上延伸的挡壁217,及一自该挡壁217的顶面向上延伸的增高壁218,其中,该挡壁217则是由一如前所述的挡墙本体215及一形成于该挡墙本体215表面的疏水膜216所构成,该增高壁218具有亲水性表面且宽度小于该挡壁217的宽度(即挡墙本体215的宽度),利用该增高壁218可用以扩充所述第一凹槽214的空间,不仅可预防容置于所述第一凹槽214中的液体3在型态变化时溢过该第一挡墙213,而造成该液体3的体积分布产生变化,此外,借由该挡壁217及该增高壁218间的宽度差所产生的空间还可增加该液体3的储存空间及增加开口率,而提升该电湿润元件的对比度及提升分辨率。
上述该电湿润元件,在配合以下电湿润元件制作方法的该第一较佳实施例说明后当可更佳清楚明白。
本发明电湿润元件的制作方法的该第一较佳实施例是以喷墨封装制程为例做说明。
参阅图5、图6,该较佳实施例包含一准备步骤51,及一封装步骤52。
首先,进行该准备步骤51,准备该基座21、封装壳22、磁力单元4,及磁性油墨31。
详细的说,该基座21是先在一由玻璃构成的透明基板表面依序形成一由铟锡氧化物(IndiumTinOxide,ITO)构成,厚度实质不小于的导电层,及一由氮化硅构成,厚度实质为的介电绝缘层形成该本体211,然后利用微影制程在该介电绝缘层表面上形成一由光阻材料构成且将该介电绝缘层表面区隔成多个独立空间的挡墙本体215,接着再利用疏水性化合物于该挡墙本体215与该介电绝缘层表面形成该疏水膜216及该疏水层212后,即可得到该第一挡墙213,而制得该基座21,且该第一挡墙213与该疏水层212共同界定出所述可容纳该液体3的第一凹槽214。
要说明的是,该疏水性化合物可经由旋转涂布(spincoating)、浸布涂布(dipping)、淋幕涂布(curtaincoating)等方式形成于该介电绝缘层与该挡墙本体215的表面,于本较佳实施例中,是将由铁氟龙构成的疏水性材料以旋转涂布(spincoating)方式形成于该介电绝缘层及该挡墙本体215的表面,而残留于该挡墙本体215顶面的疏水性材料可经由机械研磨、化学机械研磨、雷射、蚀刻等方式移除,或是利用电浆处理令该残留的疏水材料暂时丧失疏水性,而用以进行后续制程。
要说明的是,该疏水膜216与该挡墙本体215之间的高度差异,除了可利用疏水性材料旋涂量的多寡控制外,也可以是利用该挡墙本体215的制程控制而得。具体的说,若要利用制程控制形成该高度大于该疏水膜216的挡墙本体215,可以先利用第一次微影制程,在该介电绝缘层表面上形成一由光阻材料构成且将该介电绝缘层表面区隔成多个独立空间的挡墙,再将由铁氟龙构成的疏水性材料以旋转涂布(spincoating)方式形成于该介电绝缘层及该挡墙的表面,然后再将残留于该挡墙顶面的疏水材料移除或是以电浆处理令该疏水材料暂时丧失疏水性后,再利用第二次微影制程于该挡墙顶面形成一由光阻材料构成的增高层,即可得到该如图6所示高度大于该疏水膜216的挡墙本体215。
于本实施例中是以该疏水膜216的高度小于该挡墙本体215的高度为例,且该挡墙本体215是先以机械研磨方式将残留在该挡墙顶面的疏水性材料移除后再经第二次微影制程形成该增高层后而得做说明。
该封装壳22是用于与该基座21配合共同界定出一密闭空间,并可用于与该基座21配合施加电压,例如,该封装壳22可以具有一包含一透光基板、一形成于该透光基板其中一表面的导电层及一形成于该导电层表面的介电绝缘层所构成的壳体,由于该封装壳22的结构及材料为本技术领域所熟悉且非为本技术的重点,因此不再多加叙述,于本较佳实施例中,该封装壳22是以与该基座21共同界定出一密闭空间并封闭所述第一凹槽214为例作说明。
该磁力单元4是用以提供磁力而可与具有磁性的物质相互作用,可为永久磁铁、电磁铁、磁力线圈等,于本实施例中该磁力单元4为由永久磁铁构成并设置在该基座21下方,可与容置于所述第一凹槽214的磁性油墨31相互作用,而令该磁性油墨31固定并均匀分布于所述第一凹槽214的底部。
该磁性油墨31的组成份包含一顺磁性的磁性颜料及一非极性溶剂,较佳地,该磁性颜料是表面具有疏水性基团改质的氧化铁,且该非极性溶剂是选自例如正己烷、12烷、18烷等长炼烃类溶剂及硅油等。
详细地说,该表面具有疏水性基团改质的氧化铁系在长链烃类溶剂中,利用热分解油酸铁复合物产出均匀度高且具有亲油性触角的氧化铁纳米粒。借由该亲油性触角的改质可使氧化铁于油性溶剂中具有良好的分散性。
具体的说,该具有疏水性基团改质的氧化铁的制备系将表1所示的原料混合,并在70℃的条件下搅拌维持4小时,然后将反应完成的混合物利用分液漏斗用去离子水洗涤至少3次,得到油酸铁复合物(Ferric-OleateComplex)。
接着,将前述制得的油酸铁复合物与油酸(Oleicacid)及18烷(1-Octadecane)混合(配比如表2所示),以每分钟约3~5℃的速率加热至320℃,并持温30分钟,待混合溶液冷却,与一非极性溶剂调和即可得到该磁性油墨31。
表1
表2
项目 | 材料名称 | 使用量 |
1 | 油酸铁复合物 | 36g |
2 | 油酸(Oleicacid) | 5.7g |
3 | 18烷(1-Octadecane) | 200g |
接着进行该封装步骤52,将该磁性油墨31与极性溶液32封装于该密闭空间中。
于本实施例中是利用喷墨方式先将该磁性油墨31装填至所述第一凹槽214,然后将该装填有磁性油墨31的基座21置于该磁力单元4上,令该磁力单元4与容置于所述第一凹槽214的磁性油墨31作用,而将该磁性油墨31固定并均匀分散于所述第一凹槽214底部,然后再利用喷墨系统将该极性溶液32装填至所述第一凹槽214并令该极性溶液32盖覆该磁性油墨31,最后再将该封装壳22的介电绝缘层朝向该基座21,将该封装壳22与该基座21直接贴合密封后即可将该磁性油墨31及极性溶液32封装于所述第一凹槽214中,而制得该电湿润元件。
此外,要说明的是,该封装壳22也可是与该基座21的边缘贴合而与该基座21共同界定出一不封闭所述第一凹槽214的密闭空间,而得到如图7所示的结构;如此,当该液体3容置于所述第一凹槽214时,该磁性油墨31为彼此分隔容置于所述第一凹槽214,而该极性溶液32则为彼此连通。
本发明系借由该磁力单元4与该磁性油墨31之间的作用力,而令该磁性油墨31可同时经由磁力及毛细力的双重作用而可固置于所述第一凹槽214的底部,因此,可减少该磁性油墨31及极性溶液32于封装时的干扰而增加封装的便利性及有效提升良率。
本发明的电湿润元件制作方法的第二较佳实施例,是用以制作如图8所示的电湿润元件。
参阅图8,该第二较佳实施例制得的该电湿润元件与该第一较佳实施例制得的该电湿润元件的结构大致相同,不同处在于该第二较佳实施例的封装壳22具有一壳体221及一自该壳体221表面延伸的第二挡墙222,该第二挡墙222具有亲水性表面并与该第一挡墙213的位置相对应,且会与该壳体221界定出多个与所述第一凹槽214彼此对应的第二凹槽223,而所述相对应的第一、二凹槽214、223共同界定多个容置该液体3的容置空间。
参阅图9,本发明该电湿润元件制作方法的第二较佳实施例包含一准备步骤61与一封装步骤62。
该准备步骤61是先准备该基座21、封装壳22、磁力单元4及磁性油墨31。
由于该封装壳22、磁力单元4及磁性油墨31的制备方式、结构及相关材料的选择与该第一较佳实施例相同,因此不再多加赘述。本实施例该准备步骤61与该第一较佳实施例的不同处在于该封装壳22还具有一个第二挡墙222,兹将该第二挡墙222的制作方式说明如下。
首先,先在一由玻璃构成的透明基板表面依序形成一由铟锡氧化物(IndiumTinOxide,ITO)构成,厚度实质不小于的导电层,及一由氮化硅构成,厚度实质为的介电绝缘层后形成该壳体221,接着,在该壳体221上形成一层光阻层后,利用微影制程即可在该介电绝缘层表面形成一由光阻材料构成且将该介电绝缘层表面区隔成多个独立空间的第二挡墙222,而制得该封装壳22,且该第二挡墙222与该壳体221共同界定出多个与所述第一凹槽214对应的第二凹槽223,要说明的是,该第二挡墙222也可以是先在该介电绝缘层表面形成一层由亲水性材料,例如聚酰胺(Polyimide)构成的亲水层后,再利用微影蚀刻制程令该亲水层形成该第二挡墙222。
该封装步骤62则是将该磁性油墨31与极性溶液32封装于所述容置空间。
于本实施例中是利用喷墨方式先将该磁性油墨31装填至该基座21的所述第一凹槽214中,并将该极性溶液32填注于该封装壳22的所述第二凹槽223,然后将装填有该磁性油墨31的基座21置于该磁力单元4上,令该磁性油墨31与该磁力单元4作用而固定分散于所述第一凹槽214底部,接着再将设有该基座21的磁力单元4倒垂于填置有该极性溶液32的封装壳22的上方,令该第一挡墙213与该第二挡墙222对齐后贴合密封,即可制得该电湿润元件且于贴合过程中该磁力单元4为保持与该磁性油墨31作用。由于该磁性油墨31于倒垂封装的过程中会同时受到磁力及毛细力的作用而固定于所述第一凹槽214的底部,不会因为倒置而移位或是滴落,因此可更有效的将该磁性油墨31与该极性溶液32进行封装,减低现有因油/水相之间的平衡易被破坏,所造成封装良率较低的缺点。
综上所述,由于现有电湿润元件于封装液体15的过程,若不慎破坏油/水之间的平衡,容易导致后续制程元件的良率降低的问题,本发明利用该磁性油墨31取代现有电湿润元件的油墨151,因此,在封装过程可借由该磁力单元4与该磁性油墨31的作用而令该磁性油墨31朝向磁场方向均匀平铺固定;当加入外加磁场时,该磁性油墨31会拥有磁性效果,而朝向磁场方向均匀平铺固定,所以在封装的过程中该极性溶液32较不易受到扰动而可良好的维持油/水之间的平衡,因此可减少现有电湿润元件于封装液体时,因为油、水密度差异所产生的制程难度,而可增加封装的操作便利性;当外加磁场移除时,该磁性油墨31的磁力则会消失,该磁性油墨31的性质即等同一般不具磁性的油墨,因此在电湿润元件的作动过程(电场变化)中,该磁性油墨31并不会受到磁性影响而影响该磁性油墨31的性能表现,故确实能达到本发明的目的。
Claims (14)
1.一种电湿润元件,其特征在于:该电湿润元件包含:
一个封装座,包括一个基座及一个封装壳,该基座具有多个可容置液体的第一凹槽,该封装壳可与该基座共同界定出一个密闭空间,并与该基座配合施加电压;及
一液体,容设于该第一凹槽,包括一具有磁性的磁性油墨及一覆盖该磁性油墨的极性溶液,该液体在受到该基座及该封装壳施加电压时会产生型态变化,且该磁性油墨的型态变化不受其磁性影响。
2.根据权利要求1所述的电湿润元件,其特征在于:该磁性油墨的组成份含有一磁性颜料及一非极性溶剂,该磁性颜料为顺磁性且为油溶性。
3.根据权利要求2所述的电湿润元件,其特征在于:该磁性颜料的粒径不大于50nm。
4.根据权利要求2所述的电湿润元件,其特征在于:该磁性颜料是表面具有疏水性基团改质的氧化铁。
5.根据权利要求1所述的电湿润元件,其特征在于:该基座具有一本体、一形成于该本体表面的疏水层、一自该本体向上并穿过该疏水层向上延伸的第一挡墙,且该第一挡墙与该疏水层共同界定出所述第一凹槽。
6.根据权利要求5所述的电湿润元件,其特征在于:该第一挡墙具有一自该本体向上并穿过该疏水层向上延伸的挡墙本体,及一形成于该挡墙本体表面与该疏水层连接的疏水膜。
7.根据权利要求6所述的电湿润元件,其特征在于:该第一挡墙还具有一自该挡墙本体的顶面向上延伸的增高壁,该增高壁的宽度不大于该挡墙本体的宽度并具有亲水性表面。
8.根据权利要求6或7所述的电湿润元件,其特征在于:该第一挡墙的疏水膜的高度小于该挡墙本体的高度。
9.根据权利要求1所述的电湿润元件,其特征在于:该封装壳具有多个与所述第一凹槽位置相对应的第二凹槽,且所述第一凹槽、第二凹槽共同界定出多个供容置该液体的容置空间。
10.根据权利要求9所述的电湿润元件,其特征在于:该封装壳具有一壳体,及一自该壳体表面延伸的第二挡墙,该第二挡墙具有亲水性表面,并与该壳体共同界定出所述第二凹槽。
11.一种电湿润元件的制作方法,其特征在于:该制作方法包含:
一准备步骤,准备一基座、一封装壳、一磁性油墨,及一个磁力单元,该磁力单元可产生磁力并与该磁性油墨相互作用,该基座具有多个可容置液体的第一凹槽,且该封装壳可与该基座共同界定出一个密闭空间,并可与该基座配合施加电压;及
一封装步骤,将该磁性油墨装填于所述第一凹槽中,并利用该磁力单元的作用将该磁性油墨固定于所述第一凹槽底部,最后再将该磁性油墨与一极性溶液封置于该封装壳与该基座共同界定出的密闭空间,制得该电湿润元件。
12.根据权利要求11所述的电湿润元件的制作方法,其特征在于:该该封装步骤是先将该磁性油墨以喷墨方式装填至所述第一凹槽,并利用该磁力单元的作用将该磁性油墨固定于所述第一凹槽,接着将该极性溶液填注于所述第一凹槽并覆盖该磁性油墨,最后将该封装壳与该基座贴合,将该磁性油墨与该极性溶液封置于该封装壳与该基座之间。
13.根据权利要求11所述的电湿润元件的制作方法,其特征在于:该封装壳具有多个与所述第一凹槽位置相对应并可与所述第一凹槽共同界定出多个容置空间的第二凹槽,该封装步骤是将磁性油墨以喷墨方式装填至所述第一凹槽中,并将该极性溶液填注于所述第二凹槽,再将该基座与该封装壳贴合,令该磁性油墨与该极性溶液封置于所述容置空间。
14.根据权利要求11所述的电湿润元件的制作方法,其特征在于:该磁性油墨的组成份为含有一磁性颜料及一非极性溶剂,该磁性颜料为具有顺磁性且表面为疏水性基团改质的氧化铁。
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