CN115963667A - 一种用于汽车后视镜上的导电膜的制作方法 - Google Patents
一种用于汽车后视镜上的导电膜的制作方法 Download PDFInfo
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Abstract
一种用于汽车后视镜上的导电膜的制作方法,包括以下步骤,选取玻璃基板;在玻璃基板的表面镀金属反射层;在金属发射层表面镀介质反射层,使镀金属反射层和介质反射层后的玻璃基板反射率在70~80%,而透过率在10~15%;在介质反射层表面镀透明导电层。本发明的优点在于:保持较高的反射率使玻璃反射率保持在70~80%的同时,将玻璃透过率降低至10~15%,从而有效遮挡玻璃背面的汽车后视镜内部结构,避免显露用于粘接玻璃和塑料背板的双面胶以及粘贴过程中产生的气泡、胶水褶皱。
Description
技术领域
本发明涉及一种汽车后视镜制作技术领域,尤其指一种用于汽车后视镜上的导电膜的制作方法。
背景技术
现有技术中电致变色玻璃为制作高反射率低透过率的导电膜,基本采用银或银金合金作为反射材料,通过控制金属膜层厚度来实现高反低透效果;但银或银金靶材都是贵金属,生产成本较高,且银或银金合金材料的耐腐蚀性较差,需增加其他抗氧化等镀膜或工序;
传统的介质膜反射玻璃受到材料本身特性的限制,其反射率与透过率相加等于100%,即膜层反射率为75%时,透过率为25%;且由于介质膜材料特性,最高反射率只能达到80%左右,再增加厚度反射率变化不大。而且厚度一般不得过厚,否则有膜层脱落风险。因此传统的介质膜反射玻璃透过率很难降低至20%以下;
而降低玻璃透过率的意义在于,介质膜反射玻璃制作的镜片只是局部透光(如:光敏口,电子模组显示窗口等),其他区域都是通过双面胶直接与后视镜内部的塑料背板进行粘接,因此当玻璃透过率超过15%时,会同时对双面胶粘接工艺要求较高,不仅是双面胶本体颜色,消费者或还可直接观察到内部电子元器件,而且粘贴过程中产生的气泡、胶水褶皱都容易从玻璃面观察到。因此该导电膜制作方法还需进一步改进。
发明内容
本发明所要解决的技术问题是针对上述现有技术现状而提供一种能使玻璃反射率在70~80%,而透过率在10~15%,从而有效遮挡玻璃背面的汽车后视镜内部结构的用于汽车后视镜上的导电膜的制作方法。
本发明解决上述技术问题所采用的技术方案为:本用于汽车后视镜上的导电膜的制作方法,其特征在于:包括以下步骤,
一、选取表面光滑、清洁透明的玻璃基板;
二、在玻璃基板的表面镀一层能使玻璃透过率降低至小于等于15%的金属反射层;
三、在所述金属发射层表面镀能使玻璃反射率在70~80%、玻璃透过率在20~30%的介质反射层,使镀金属反射层和介质反射层后的玻璃基板反射率在70~80%,而透过率在10~15%;
四、在介质反射层表面镀透明导电层,即完成用于汽车后视镜上的导电膜的制作。
作为改进,所述金属反射层可优选为Ti、Cr或TiCr合金。
进一步改进,所述金属反射层的膜层厚度可优选为20~50nm。
作为改进,所述介质反射层可优选为Nb2O5或SiO2。
进一步改进,所述介质反射层可优选由3~5层介质膜层组成,每层介质膜层均为Nb2O5或SiO2。
进一步改进,步骤三的具体方法可优选为,重复镀Nb2O5或SiO2介质,每层介质膜层的厚度为50~90nm,镀3~5层。
作为改进,所述透明导电层可优选为ITO。
进一步改进,所述透明导电层的膜层厚度可优选为100~150nm。
作为改进,本方法可优选采用连续性磁控溅射镀膜机一体镀膜成型。
作为改进,所述玻璃基板可优选为浮法玻璃,所述金属反射层镀在浮法玻璃的玻璃锡面。
与现有技术相比,本发明的优点在于:保持较高的反射率使玻璃反射率保持在70~80%的同时,将玻璃透过率降低至10~15%,从而有效遮挡玻璃背面的汽车后视镜内部结构,避免显露用于粘接玻璃和塑料背板的双面胶以及粘贴过程中产生的气泡、胶水褶皱;金属反射层采用Ti、Cr或TiCr合金,相比于金银作为原材料,成本更低,耐腐蚀性更好;通过连续性磁控溅射镀膜机一体镀膜成型,镀膜效率高,控制精度高,各个膜层厚度均匀,镀膜效果好。
附图说明
图1为本发明实施例将导电膜镀至玻璃基板上的结构示意图;
图2为图1中I部分的放大图。
具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
如图1和图2所示,本实施例的用于汽车后视镜上的导电膜的制作方法,包括以下步骤,
一、选取表面光滑、清洁透明的玻璃基板4;
二、在玻璃基板4的表面用连续性磁控溅射镀膜机镀一层金属反射层1,金属反射层1为TiCr合金,膜层厚度为20nm;连续性磁控溅射镀膜机及其镀膜的工作原理及方法属于公知技术,故不再展开描述。
三、在金属发射层1表面镀介质反射层2,重复镀Nb2O5,共镀4层,每层厚度为50nm;此时,镀金属反射层1和介质反射层2后的玻璃基板4的反射率在70~80%,而透过率在10~15%;
四、在介质反射层2表面镀透明导电层3,透明导电层3为ITO,ITO是指氧化铟锡,属于现有材料,故不再详述。透明导电层3的膜层厚度为100nm,即完成用于汽车后视镜上的导电膜的制作。
第二种实施例的用于汽车后视镜上的导电膜的制作方法,包括以下步骤,
一、选取表面光滑、清洁透明的玻璃基板4;
二、在玻璃基板4的表面用连续性磁控溅射镀膜机镀一层金属反射层1,金属反射层1为Ti,膜层厚度为50nm;连续性磁控溅射镀膜机及其镀膜的工作原理及方法属于公知技术,故不再展开描述。
三、在金属发射层1表面镀介质反射层2,重复镀SiO2,共镀4层,每层厚度为50nm;此时,镀金属反射层1和介质反射层2后的玻璃基板4的反射率在70~80%,而透过率在10~15%;
四、在介质反射层2表面镀透明导电层3,透明导电层3为ITO,ITO是指氧化铟锡,属于现有材料,故不再详述。透明导电层3的膜层厚度为100nm,即完成用于汽车后视镜上的导电膜的制作。
第三种实施例的用于汽车后视镜上的导电膜的制作方法,包括以下步骤,
一、选取表面光滑、清洁透明的玻璃基板4;
二、在玻璃基板4的表面用连续性磁控溅射镀膜机镀一层金属反射层1,金属反射层1为Cr,膜层厚度为20nm;连续性磁控溅射镀膜机及其镀膜的工作原理及方法属于公知技术,故不再展开描述。
三、在金属发射层1表面镀介质反射层2,重复镀SiO2,共镀3层,每层厚度为50nm;此时,镀金属反射层1和介质反射层2后的玻璃基板4的反射率在70~80%,而透过率在10~15%;
四、在介质反射层2表面镀透明导电层3,透明导电层3为ITO,ITO是指氧化铟锡,属于现有材料,故不再详述。透明导电层3的膜层厚度为150nm,即完成用于汽车后视镜上的导电膜的制作。
第四种实施例的用于汽车后视镜上的导电膜的制作方法,包括以下步骤,
一、选取表面光滑、清洁透明的浮法玻璃作为玻璃基板4;
二、在浮法玻璃的玻璃锡面用连续性磁控溅射镀膜机镀一层金属反射层1,金属反射层1为Cr,膜层厚度为20nm;连续性磁控溅射镀膜机及其镀膜的工作原理及方法属于公知技术,故不再展开描述。
三、在金属发射层1表面镀介质反射层2,重复镀Nb2O5,共镀5层,每层厚度为90nm;此时,镀金属反射层1和介质反射层2后的玻璃基板4的反射率在70~80%,而透过率在10~15%;
四、在介质反射层2表面镀透明导电层3,透明导电层3为ITO,ITO是指氧化铟锡,属于现有材料,故不再详述。透明导电层3的膜层厚度为150nm,即完成用于汽车后视镜上的导电膜的制作。
工作原理:介质反射层虽然可满足反射率的要求,但透光指标无法完成。因此本发明的技术方案中利用Ti、Cr或TiCr合金反射特性通过控制膜层厚度,先在玻璃基板表面镀一层金属反射层,降低玻璃透过率(10~15%),(该材料可实现反射率40~50%,金属反射层对可见波动光阻隔效果良好)。在金属反射层上再镀介质反射层和导电层。因金属反射层在介质反射层下层,不会影响整体反射效果,但会决定整体的透光率。
Claims (10)
1.一种用于汽车后视镜上的导电膜的制作方法,其特征在于:包括以下步骤,
一、选取表面光滑、清洁透明的玻璃基板(4);
二、在玻璃基板(4)的表面镀一层能使玻璃透过率降低至小于等于15%的金属反射层(1);
三、在所述金属发射层(1)表面镀能使玻璃的反射率在70~80%、透过率在20~30%的介质反射层(2),使镀金属反射层(1)和介质反射层(2)后的玻璃基板(4)的反射率在70~80%,而透过率在10~15%;
四、在介质反射层(2)表面镀透明导电层(3),即完成用于汽车后视镜上的导电膜的制作。
2.根据权利要求1所述的制作方法,其特征在于:所述金属反射层(1)为Ti、Cr或TiCr合金。
3.根据权利要求2所述的制作方法,其特征在于:所述金属反射层(1)的膜层厚度为20~50nm。
4.根据权利要求1所述的制作方法,其特征在于:所述介质反射层(2)为Nb2O5或SiO2。
5.根据权利要求4所述的制作方法,其特征在于:所述介质反射层(2)由3~5层介质膜层(21)组成,每层介质膜层(21)均为Nb2O5或SiO2。
6.根据权利要求5所述的制作方法,其特征在于:步骤三的具体方法为,重复镀Nb2O5或SiO2介质,每层介质膜层(21)的厚度为50~90nm,镀3~5层。
7.根据权利要求1所述的制作方法,其特征在于:所述透明导电层(3)为ITO。
8.根据权利要求7所述的制作方法,其特征在于:所述透明导电层(3)的膜层厚度为100~150nm。
9.根据权利要求1至8中任一所述的制作方法,其特征在于:本方法采用连续性磁控溅射镀膜机一体镀膜成型。
10.根据权利要求1至8中任一所述的制作方法,其特征在于:所述玻璃基板(4)为浮法玻璃,所述金属反射层(1)镀在浮法玻璃的玻璃锡面。
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WO2024139371A1 (zh) * | 2022-12-28 | 2024-07-04 | 扬州晶彩光电科技有限公司 | 一种用于汽车后视镜上的导电膜的制作方法 |
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