共查询到19条相似文献,搜索用时 343 毫秒
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光刻工艺涉及复杂的光化学反应和物理过程,在理论上优化各工艺参数非常困难。本文通过大量实验,对甩胶、前烘、曝光、显影、坚膜等影响光刻图像质量的工艺进行研究,得到了比较优化的工艺参数。即在5500~6500rpm的转速下甩胶20~30s,取得较均匀的光刻胶膜后,在80~90℃下前烘20~30min,再经过30-50mW/cm^2的曝光和20s的显影,最后经过15-25min的100~130℃坚膜,可得到较好的光刻图形。 相似文献
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计算光刻是提高光刻成像性能的有效方法。但是,大多数计算光刻技术建立在理想光刻系统下而忽略了系统误差的影响。系统误差中的工件台振动会导致光刻图形误差增大和工艺窗口下降。因此,必须要降低工件台振动对光刻性能的影响。建立了一种对工件台振动低敏感的光刻系统协同优化方法。首先利用Zernike多项式表征光源来降低算法计算量并提高光源优化自由度。然后创建一项涵盖工件台振动影响的综合评价函数。最后采用基于梯度的统计优化算法建立优化流程。14 nm节点一维掩模图形仿真表明极端工件台振动下,该方法的特征尺寸误差降低28.7%,工艺窗口增大67.3%。结果证明该方法可以有效降低工件台振动敏感度并提高光刻工艺稳定性。 相似文献
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针对一些曲面栅网器件的加工工艺,从实验装置、光刻原理、光刻工艺及参数要求等方面进行了分析,为后续深入开展曲面直写式光刻工艺打下了基础. 相似文献
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介绍了光刻法石墨烯的制备方法,分析了光刻工艺过后石墨烯方阻升高的不良机理,并给出了相应的优化方案。首先,根据半导体工艺研发制程完成石墨烯图案化工艺方案,并对工艺方案进行有效优化。接着,分析了石墨烯光刻法图案化后方阻升高的机理。最后,通过改善工艺方案,增加金属湿法刻蚀的步骤,解决石墨烯方阻升高的问题。实验结果表明:通过光刻法制得的石墨烯具有更高的图案精细度,关键尺寸可达到5μm。双层石墨烯膜的方阻在光刻法图案化后,通过工艺改善可以保持原始膜最初阻值约330Ω/,甚至可以降低到270Ω/左右。光刻法图案化石墨烯技术,既能保证石墨烯图案尺寸精度,又可以保持甚至降低石墨烯方阻值,适合于量产开发。 相似文献
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Jong Rak Park Hyun Su Kim Jin‐Tae Kim Moon‐Gyu Sung Won‐Il Cho Ji‐Hyun Choi Sung‐Woon Choi 《ETRI Journal》2005,27(2):188-194
We report on the improvement of critical dimension (CD) linearity on a photomask by applying the concept of process proximity correction to a laser lithographic process used for the fabrication of photomasks. Rule‐based laser process proximity correction (LPC) was performed using an automated optical proximity correction tool and we obtained dramatic improvement of CD linearity on a photomask. A study on model‐based LPC was executed using a two‐Gaussian kernel function and we extracted model parameters for the laser lithographic process by fitting the model‐predicted CD linearity data with measured ones. Model‐predicted bias values of isolated space (I/S), arrayed contact (A/C) and isolated contact (I/C) were in good agreement with those obtained by the nonlinear curve‐fitting method used for the rule‐based LPC. 相似文献
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On the use of decision tree induction for discovery of interactions in a photolithographic process 总被引:1,自引:0,他引:1
This paper delineates a comprehensive and successful application of decision tree induction to 1054 records of production lots taken from a lithographic process with 45 processing steps. Complex interaction effects among manufacturing equipment that lead to increased product variability have been detected. The extracted information has been confirmed by the process engineers, and used to improve the lithographic process. The paper suggests that decision tree induction may be particularly useful when data is multidimensional, and the various process parameters and machinery exhibit highly complex interactions. Another implication is that on-line monitoring of the manufacturing process (e.g., closed-loop critical dimensions control) using data mining may be highly effective. 相似文献
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随着光刻特征尺寸的不断减小,尤其是随着分辨力增强技术的使用,像质参数的原位检测已成为先进的投影光刻机中不可或缺的功能。然而现有的每种技术均只能检测有限的几种像质参数。提出了一种新的基于像传感器的光刻机多成像质量参数原位检测(MIQM)技术。该技术通过对原有的测量模型进行修正和扩展,从而在精确测量低阶成像质量参数的同时能高精度地测量高阶成像质量参数。此外,该技术是基于空间像测量的像质参数原位检测技术,从而具有速度快、稳定性好等优点。通过该技术的低阶像质参数测量精度与原有技术相近,而高阶像质参数测量重复精度优于1 nm。实验结果表明该技术能一次完成步进扫描投影光刻机的多个像质参数的精确测量,从而简化了光刻机像质检测过程,大量节约了测量时间,有效避免了像质参数之间的互相影响。 相似文献
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《Electron Device Letters, IEEE》1985,6(7):329-331
This letter describes a method which can directly observe the aerial image of a lithographic exposure tool. Submicrometer resist structures, doped with a laser dye, are swept through the lithographic image as fluorescence is monitored. Experimental aerial image profiles are reported for a 5X reduction lens at varying focus parameters. The location of the fluorescent structures with respect to the image can be accurately determined to yield real-time overlay information. 相似文献
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国际主流光刻机研发的最新进展 总被引:3,自引:0,他引:3
介绍了65 nm和45 nm节点国际主流光刻机的最新研发进展,重点分析了目前提高光刻机性能的关键技术,讨论了目前各公司的主流机型及其性能参数,最后简要介绍了下一代光刻技术的研究进展. 相似文献
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提出一种精确检测光刻机激光干涉仪测量系统非正交性的新方法.将对准标记曝光到硅片表面并进行显影;利用光学对准系统测量曝光到硅片上的对准标记理论曝光位置与实际读取位置的偏差;由推导的位置偏差与非正交因子、坐标轴尺度比例、过程引入误差的线性模型,根据最小二乘原理计算出干涉仪测量系统的非正交性.实验结果表明,利用该方法使用同一硅片在不同旋转角下进行测量,干涉仪测量系统非正交因子的测量重复精度优于0.01μrad,坐标轴尺度比例的测量重复精度优于0.7×10-6.使用不同的硅片进行测量,非正交因子的测量再现性优于0.012μrad,坐标轴尺度比例的测量再现性优于0.6×10-6. 相似文献
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Free volume greatly influences the lithographic performance of chemically amplified systems. This work studies its generation and variations during the various steps of the lithographic process, i. e. from film formation to post-exposure bake. 相似文献
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《Microelectronic Engineering》2007,84(5-8):733-736
A simulation method based on scalar diffraction analysis of proximity and contact lithography is presented and compared with rigorous electromagnetic calculations in terms of accuracy and computation cost. It is shown that the error of the diffraction method is tolerable for standard lithography processes. Several examples demonstrate the integration of the new method in a typical lithographic process flow. 相似文献