共查询到19条相似文献,搜索用时 156 毫秒
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合成了苯并恶嗪单体B-a,通过非等温和等温DSC测量考察了单体的热固化行为;考察了固化温度及固化时间对聚合物膜表面能的影响,并对其热稳定性进行了研究。结果表明,随着固化温度的升高,单体聚合所得聚合物的表面能先降低后基本保持不变,达到210℃后所得聚合物表面能即没有显著变化,在210℃下随着固化时间的增加,单体聚合所得聚合物的表面能先降低后升高,在固化时间为1h时所得聚合物表面能最低,单体在210℃固化1h所得聚合物膜的表面能为16.73mN/m,比纯的聚四氟乙烯的表面能(21mN/m)还要低,该条件下得到聚合物膜的表面粗糙度仅为0.204nm,玻璃化转化温度为161℃,失重5%的温度T5为334℃,可以作为抗粘材料应用在热压印技术中。 相似文献
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为开发大尺寸场发射显示器需要的能承受高温热处理的薄膜电极,以Al作为Ag层的保护层和与玻璃衬底的粘附层,采用直流磁控溅射制备了Al/Ag/Al复合薄膜及其电极.采用XRD、AFM、光学显微镜和电性能测试系统,研究不同温度热处理对复合薄膜和电极结构、表面形貌和电性能的影响.由于表面致密的Al2O3膜的保护,使得加热退火(<600℃)不会对Al/Ag/Al薄膜和电极造成明显的氧化,然而Al层与Ag层发生的界面扩散和固相反应增大了电极的电阻率(从5.0×10~(-8) Ω·m 上升至23.6×10~(-8) Ω·m).另外热处理温度足够高时(500℃、600℃),Ag原子向表面的扩散一定程度上降低了电极的化学稳定性.尽管如此,与Cr/Cu/Cr薄膜电极相比Al/Ag/Al薄膜电极仍然是一种能够承受高温热处理并且保持较低电阻率的新型电极. 相似文献
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在制造彩色显象管过程中,要对荧光屏内表面施加荧光粉组成的上万计之荧光粉点或条状物,然后在这些连续的粉点或条组成的面上,盖上一层光亮如镜厚度约0.1~0.3μm铝(蒸铝)。当我们剖开显象管观察荧光屏内表面时,举目可见。就在采用蒸发方法将这镜状铝层固定于荧光粉点或条组成的表面之前,必须首先涂上一层厚度约0.2μm胶状膜,俗称有机膜。也就是说,铝粉蒸发在有机膜上,而不直接蒸发在荧光粉点或条上,当这个镜状铝层完成之后,有机膜这个层间物也就完成其工艺使命,要采用加温烘烤方法将其完全排除出去而不留痕 相似文献
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研究了有机薄膜晶体管器件.器件是以热生长的SiO2作为有机薄膜晶体管的栅绝缘层,酞菁铜作为有源层的.实验表明采用一种硅烷耦合剂-十八烷基三氯硅烷(OTS)修饰SiO2可以有效地降低栅绝缘层的表面能从而明显提高了器件的性能.器件的场效应迁移率提高了2.5倍、阈值电压降低了3 V、开关电流比从103增加到104.同时我们采用MoO3修饰铝作为器件的源漏电极,形成MoO3/Al双层电极结构.实验表明在同样的栅极电压下,具有MoO3/Al 电极的器件和金电极的器件有着相似的源漏输出电流Ids.结果显示具有OTS/SiO2双绝缘层的及MoO3/Al 电极结构的器件能有效改进有机薄膜晶体管的性能. 相似文献
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本文介绍了一种消除黑白显象管铝破、铝泡的有效方法——热水洗膜法。把洗膜用纯水的温度提高到30~45℃之间,促使玻壳温度及其内部空间温度、相对湿度、气氛的变化,引起屏上有机膜的粘滞性、表面张力系数减少,流动性能增加,屏锥封接线附近的膜层变得薄和均匀,达到了消除铝破、铝泡的目的。同时,由于膜层性能的改善,得到了更接近镜面的铝膜层,而使显象管亮度大幅度提高。 相似文献
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LB膜与AFM技术研究磷脂酰乙醇胺单分子膜结构 总被引:2,自引:2,他引:0
用LB膜技术对磷脂酰乙醇胺(PE)单分子膜的影响因素进行了研究。实验发现溶液浓度、亚相温度、pH值以及胆固醇含量等因素对磷脂酰乙醇胺单分子膜成膜条件有一定的影响。当溶液浓度为0.32 mg/mL,加入量在100~500μL范围内,随着加入量的增多,磷脂分子越易形成致密的单分子层;温度升高对单分子膜有一定的破坏作用,在39.1℃时,亚相的pH值在中性或接近中性的弱酸条件下,PE分子排列更有序;胆固醇的加入降低了PE分子膜的流动性,对单分子膜有显著的稳固作用。用Y型LB提膜法将单分子膜转移到新解离的云母表面,用原子力显微镜技术对其进行了分子结构的观察研究,实验结果表明,膜压低于1 mN/m时,液面上磷脂分子的烃链自由弯曲运动,取向性呈无序随机排列。但在大于1 mN/m时,PE分子较易形成有序分子膜,膜压为33 mN/m,形成高质量的LB膜。 相似文献
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ULSI铜互连线CMP抛光液的研制 总被引:8,自引:3,他引:5
介绍了一种碱性抛光液,选用有机碱做介质,SiO2水溶胶做磨料,依据强络合的反应机理,克服了SiO2水溶胶做磨料对铜去除速率低及在溶液中凝胶的难点.实验结果表明:该抛光液适用于Cu化学机械抛光过程第一阶段的抛光,并达到了高抛光速率及铜/钽/介质层间的高选择性的效果. 相似文献
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The propagation characteristics of magnetostatic surface waves (m.s.s.w.) in a layered system of y.i.g. film, dielectric, y.i.g. film, are theoretically investigated. It is shown that the directional coupling of m.s.s.w. is possible between y.i.g. films. The directional coupling has frequency filtering characteristics due to dispersion of m.s.s.w. 相似文献
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Leakage current measurements were made across the surface of silicon test chips up to a temperature of 130°C (403°K) and 70% relative humidity (RH) to develop a more accelerated temperature-humidity-bias corrosion test. Several equations were fitted to the data in order to extrapolate the surface conductivity data to operating conditions. A smooth transistion from atmospheric pressure into the pressurized steam region was observed. The leakage current acceleration factor is the same at 130°C/60%RH and 85°C/85%RH for bare gold electrodes. For nitride-covered aluminum conductors the equlvalent conditions are 130°C/65%RH or 85°C/85%RH. The advantage in the steam region is a larger temperature differential between the sample and saturation; approximately 15°C as opposed to 4°C for the 85°C/85%RH. This makes the steam test easier to control, but might raise the temperature beyond the decomposition limits for organic packaging materials. For inorganic systems with nitride-covered aluminum electrodes, an acceleration by a factor of three compared to 85°%C/85%RH can be obtained at 140°C/70%RH or 17°C/60%RH. Coefficients were determined by multiple regression analysis for three forms of equations which express the surface conductivity in terms of reciprocal absolute temperature and RH. The acceleration factors determined by a power law are consistently lower than those determined by two forms of an exponential equation. 相似文献
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为了给铜箔积层板设计提供科学指导,采用动力学分析(DMA)和热力学分析(TMA)等表征手段,研究了二氧化硅和硅烷偶联剂对产品尺寸稳定性及力学强度的影响。结果表明:(1)二氧化硅(未使用硅烷偶联荆处理)添加比例为30%时,热膨胀系数为2.76%,产品的储能模量和力学损耗tanδ拐点温度分别达到15615MPa和163.53℃,产品的尺寸稳定性和力学强度最好。(2)二氧化硅和硅烷偶联剂添加比例分别为25%和1.5%时,产品的储能模量和力学损耗tanδ拐点温度分别达到14644MPa和169.5℃,表明添加硅烷偶联剂能够显著提高产品的力学强度。 相似文献
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Silicon nitride film deposited by LPCVD with newly developed in situ HF vapor cleaning has been studied and applied to fabricate dielectric films for stacked DRAM capacitors. Using this method, an oxide-free surface of underlaid poly-Si can be obtained. Silicon nitride film deposited on this surface has been verified by FTIR measurement to have the stoichiometrically proper composition of Si3N4 . However, the film was found to be selectively deposited on poly-Si electrodes. This selective deposition degrades the reliability of the stacked capacitor, because the silicon nitride can not completely cover the periphery of poly-Si electrodes on SiO2. We propose a simple process that avoids the problem making it possible to apply silicon nitride film to stacked-capacitor fabrication. Stacked capacitors fabricated by this process exhibit very low leakage current and high electrical reliability even for ultra-thin silicon nitride films less than 5 nm thick 相似文献
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