CN111647253A - 一种低热膨胀系数覆铜板及其制备方法 - Google Patents
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Abstract
本发明提供一种低热膨胀系数覆铜板,由经浸渍液浸渍的玻纤布为半固化片覆铜箔制成;按重量份计,其浸渍液原料组分包括:改性硅油30‑40份、环氧树脂50‑60份、有机溶剂100‑200份、催化剂0.2‑0.8份、固化剂5‑10份、无机填料50‑200份。本发明还提供了该种低热膨胀系数覆铜板的制备方法。本发明制备的低热膨胀系数覆铜板具有较好的耐热性,其热膨胀系数为3.0ppm/℃~4.0ppm/℃,同时具有较好的铜箔黏结耐焊性,具有良好的稳定性,具有良好的工业化前景。
Description
技术领域
本发明涉及覆铜板领域,具体是涉及一种低热膨胀系数覆铜板及其制备方法。
背景技术
欧盟两指令的正式实施标志着全球电子行业进入了无铅焊接时代,由于无铅焊接温度的提高,对覆铜板热可靠性的要求相应提高;随着印制电路多层化和IC封装技术的发展,为了提高互联与封装的可靠性,稳定性,不仅要求板材具备高耐热性,而且要兼备低的热膨胀系数(CTE)。
发明内容
本发明的第一目的是提供一种低热膨胀系数覆铜板。
本发明的第二目的是提供一种低热膨胀系数覆铜板的制备方法。
为了实现上述的第一目的,本发明提供的一种低热膨胀系数覆铜板,由经浸渍液浸渍的玻纤布为半固化片覆铜箔制成;按重量份计,其浸渍液原料组分包括:
改性硅油30-40份、环氧树脂50-60份、有机溶剂100-200份、催化剂0.2-0.8份、固化剂5-10份、无机填料50-200份。
其中,改性硅油为含有环氧基团、氨基、羟基、甲基丙烯酰基、巯基、羧基以及烷氧基的硅油中的任意一种或多种。
其中,有机溶剂为丙二醇单甲醚、甲基异丁酮、甲苯和二甲基乙酰胺中的任意一种或多种。
其中,催化剂为有机金属盐类或有机金属络合物,具体为环烷酸锌、环烷酸钴、辛酸锡、辛酸钴、二乙酰丙酮钴(II)、三乙酰丙酮钴(III)中的任意一种。
其中,固化剂为双氰胺、二氨基二苯基甲烷以及二氨基二苯基砜中的任意一种或多种。
其中,无机填料为球形的熔融石英粉,其平均粒子直径为0.3-0.8μm。
由上述方案可见,改性硅油和环氧树脂相配合,这样刚性的树脂与柔性的硅油结合,使得出的半固化片样品中高弹性部分和低弹性部分发生“相分离结构”,从而缓和应力,有助于降低热膨胀系数,从而使基材的翘曲量下降。
为了实现上述的第二目的,本发明提供的一种低热膨胀系数覆铜板的制备方法,具体步骤如下:
S1.按重量份将改性硅油、环氧树脂、催化剂、固化剂、无机填料加入到有机溶剂中,制成树脂质量分数为60-65%的树脂混合物;
S2.将玻纤布放入S1中制备树脂混合物中,浸渍后取出,160℃下干燥10-15min,得到树脂质量分数为50-55%的半固化片;
S3.按照一定尺寸剪取将S2中半固化片叠合整齐,上下附上铜箔,置于真空热压机中压制得到覆铜板。
本发明的有益效果:
本发明制备的低热膨胀系数覆铜板具有较好的耐热性,其热膨胀系数为3.0ppm/℃~4.0ppm/℃,同时具有较好的铜箔黏结耐焊性,具有良好的稳定性,具有良好的工业化前景。
具体实施方式
为了更清楚、完整的描述本发明的技术方案,以下通过具体实施例进一步详细说明本发明,应当理解,此处所描述的具体实施例仅用于解释本发明,并不用于限定本发明,可以在本发明权利限定的范围内进行各种改变。
实施例1
一种低热膨胀系数覆铜板,由经浸渍液浸渍的玻纤布为半固化片覆铜箔制成;按重量份计,其浸渍液原料组分包括:
改性硅油30份、环氧树脂60份、有机溶剂200份、催化剂0.8份、固化剂5份、无机填料50份。
其中,改性硅油为含有环氧基团、氨基、羟基、甲基丙烯酰基、巯基、羧基以及烷氧基的硅油中的任意一种或多种。
其中,有机溶剂为丙二醇单甲醚、甲基异丁酮、甲苯和二甲基乙酰胺中的任意一种或多种。
其中,催化剂为有机金属盐类或有机金属络合物,具体为环烷酸锌、环烷酸钴、辛酸锡、辛酸钴、二乙酰丙酮钴(II)、三乙酰丙酮钴(III)中的任意一种。
其中,固化剂为双氰胺、二氨基二苯基甲烷以及二氨基二苯基砜中的任意一种或多种。
其中,无机填料为球形的熔融石英粉,其平均粒子直径为0.8μm。
一种低热膨胀系数覆铜板的制备方法,具体步骤如下:
S1.按重量份将改性硅油、环氧树脂、催化剂、固化剂、无机填料加入到有机溶剂中,制成树脂质量分数为65%的树脂混合物;
S2.将玻纤布放入S1中制备树脂混合物中,浸渍后取出,160℃下干燥10min,得到树脂质量分数为55%的半固化片;
S3.按照一定尺寸剪取将S2中半固化片叠合整齐,上下附上铜箔,置于真空热压机中压制得到覆铜板。
实施例2
一种低热膨胀系数覆铜板,由经浸渍液浸渍的玻纤布为半固化片覆铜箔制成;按重量份计,其浸渍液原料组分包括:
改性硅油40份、环氧树脂50份、有机溶剂100份、催化剂0.2份、固化剂10份、无机填料200份。
其中,改性硅油为含有环氧基团、氨基、羟基、甲基丙烯酰基、巯基、羧基以及烷氧基的硅油中的任意一种或多种。
其中,有机溶剂为丙二醇单甲醚、甲基异丁酮、甲苯和二甲基乙酰胺中的任意一种或多种。
其中,催化剂为有机金属盐类或有机金属络合物,具体为环烷酸锌、环烷酸钴、辛酸锡、辛酸钴、二乙酰丙酮钴(II)、三乙酰丙酮钴(III)中的任意一种。
其中,固化剂为双氰胺、二氨基二苯基甲烷以及二氨基二苯基砜中的任意一种或多种。
其中,无机填料为球形的熔融石英粉,其平均粒子直径为0.3μm。
一种低热膨胀系数覆铜板的制备方法,具体步骤如下:
S1.按重量份将改性硅油、环氧树脂、催化剂、固化剂、无机填料加入到有机溶剂中,制成树脂质量分数为60%的树脂混合物;
S2.将玻纤布放入S1中制备树脂混合物中,浸渍后取出,160℃下干燥15min,得到树脂质量分数为50%的半固化片;
S3.按照一定尺寸剪取将S2中半固化片叠合整齐,上下附上铜箔,置于真空热压机中压制得到覆铜板。
实施例3
一种低热膨胀系数覆铜板,由经浸渍液浸渍的玻纤布为半固化片覆铜箔制成;按重量份计,其浸渍液原料组分包括:
改性硅油35份、环氧树脂55份、有机溶剂150份、催化剂0.8份、固化剂8份、无机填料180份。
其中,改性硅油为含有环氧基团、氨基、羟基、甲基丙烯酰基、巯基、羧基以及烷氧基的硅油中的任意一种或多种。
其中,有机溶剂为丙二醇单甲醚、甲基异丁酮、甲苯和二甲基乙酰胺中的任意一种或多种。
其中,催化剂为有机金属盐类或有机金属络合物,具体为环烷酸锌、环烷酸钴、辛酸锡、辛酸钴、二乙酰丙酮钴(II)、三乙酰丙酮钴(III)中的任意一种。
其中,固化剂为双氰胺、二氨基二苯基甲烷以及二氨基二苯基砜中的任意一种或多种。
其中,无机填料为球形的熔融石英粉,其平均粒子直径为0.4μm。
一种低热膨胀系数覆铜板的制备方法,具体步骤如下:
S1.按重量份将改性硅油、环氧树脂、催化剂、固化剂、无机填料加入到有机溶剂中,制成树脂质量分数为62%的树脂混合物;
S2.将玻纤布放入S1中制备树脂混合物中,浸渍后取出,160℃下干燥12min,得到树脂质量分数为53%的半固化片;
S3.按照一定尺寸剪取将S2中半固化片叠合整齐,上下附上铜箔,置于真空热压机中压制得到覆铜板。
实施例4
一种低热膨胀系数覆铜板,由经浸渍液浸渍的玻纤布为半固化片覆铜箔制成;按重量份计,其浸渍液原料组分包括:
改性硅油38份、环氧树脂56份、有机溶剂110份、催化剂0.2份、固化剂5份、无机填料80份。
其中,改性硅油为含有环氧基团、氨基、羟基、甲基丙烯酰基、巯基、羧基以及烷氧基的硅油中的任意一种或多种。
其中,有机溶剂为丙二醇单甲醚、甲基异丁酮、甲苯和二甲基乙酰胺中的任意一种或多种。
其中,催化剂为有机金属盐类或有机金属络合物,具体为环烷酸锌、环烷酸钴、辛酸锡、辛酸钴、二乙酰丙酮钴(II)、三乙酰丙酮钴(III)中的任意一种。
其中,固化剂为双氰胺、二氨基二苯基甲烷以及二氨基二苯基砜中的任意一种或多种。
其中,无机填料为球形的熔融石英粉,其平均粒子直径为0.3-0.8μm。
一种低热膨胀系数覆铜板的制备方法,具体步骤如下:
S1.按重量份将改性硅油、环氧树脂、催化剂、固化剂、无机填料加入到有机溶剂中,制成树脂质量分数为60%的树脂混合物;
S2.将玻纤布放入S1中制备树脂混合物中,浸渍后取出,160℃下干燥10min,得到树脂质量分数为50%的半固化片;
S3.按照一定尺寸剪取将S2中半固化片叠合整齐,上下附上铜箔,置于真空热压机中压制得到覆铜板。
实施例1-4的低热膨胀系数覆铜板的特性由以下方法测定。结果如表1所示。
(1)玻璃化温度(Tg),检测方法:采用示差扫描量热法(DSC),是指板材在受热情况下由玻璃态转变为高弹态(橡胶态)所对应的温度(℃)。
(2)热膨胀系数,检测方法:将去掉铜箔的覆铜板样品加工成5mm见方,采用TMA测试装置进行热机械分析。把试样按照X-方向安装在装置上,以5g的负荷、加热速度10℃/min的测定条件下连续测定两次,计算30-100℃的平均热膨胀系数。
(3)铜箔黏结耐焊性,检测方法:将覆铜板加工成25mm见方,放入到288℃的焊锡浴中,漂浮120分钟,观察铜箔是否气泡。
(4)翘曲量,检测方法:采用阴影波纹分析法,把样品从室温加热到260℃,之后冷却到50℃,测定其翘曲量。
表1实施例制备的低热膨胀系数覆铜板性能测试
最后需要强调的是,以上所述仅为本发明的优选实施例,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种变化和更改,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (7)
1.一种低热膨胀系数覆铜板,其特征在于,由经浸渍液浸渍的玻纤布为半固化片覆铜箔制成;按重量份计,所述浸渍液原料组分包括:
改性硅油30-40份、环氧树脂50-60份、有机溶剂100-200份、催化剂0.2-0.8份、固化剂5-10份、无机填料50-200份。
2.根据权利要求1所述的一种低热膨胀系数覆铜板,其特征在于,所述改性硅油为含有环氧基团、氨基、羟基、甲基丙烯酰基、巯基、羧基以及烷氧基的硅油中的任意一种或多种。
3.根据权利要求1所述的一种低热膨胀系数覆铜板,其特征在于,所述有机溶剂为丙二醇单甲醚、甲基异丁酮、甲苯和二甲基乙酰胺中的任意一种或多种。
4.根据权利要求1所述的一种低热膨胀系数覆铜板,其特征在于,所述催化剂为有机金属盐类或有机金属络合物,具体为环烷酸锌、环烷酸钴、辛酸锡、辛酸钴、二乙酰丙酮钴(II)、三乙酰丙酮钴(III)中的任意一种。
5.根据权利要求1所述的一种低热膨胀系数覆铜板,其特征在于,所述固化剂为双氰胺、二氨基二苯基甲烷以及二氨基二苯基砜中的任意一种或多种。
6.根据权利要求1所述的一种低热膨胀系数覆铜板,其特征在于,所述无机填料为球形的熔融石英粉,其平均粒子直径为0.3-0.8μm。
7.根据权利要求1至6任一项所述的一种低热膨胀系数覆铜板的制备方法,其特征在于,具体步骤如下:
S1.按重量份将改性硅油、环氧树脂、催化剂、固化剂、无机填料加入到有机溶剂中,制成树脂质量分数为60-65%的树脂混合物;
S2.将玻纤布放入S1中制备树脂混合物中,浸渍后取出,160℃下干燥10-15min,得到树脂质量分数为50-55%的半固化片;
S3.按照一定尺寸剪取将S2中半固化片叠合整齐,上下附上铜箔,置于真空热压机中压制得到覆铜板。
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CN104105756A (zh) * | 2012-01-26 | 2014-10-15 | 东丽株式会社 | 树脂组合物及将该树脂组合物成型而成的半导体安装基板 |
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