The cross-section profiles of polymer deformation in the hot embossing lithography process were studied by finite element method for various temperature, time and pressure. In order to successfully fabricate high-freq...The cross-section profiles of polymer deformation in the hot embossing lithography process were studied by finite element method for various temperature, time and pressure. In order to successfully fabricate high-frequency grating lines, an optimal imprint condition was selected and the related experiments were carried out. The fabricated gratings were illuminated by the SEM image and AFM analysis, which agree well with the simulated results. Therefore, the finite element methods are helpful for a better comprehension of the polymer flow phenomena governing the pattern definition and the design of optimum processing conditions for successful grating fabrication.展开更多
提出在Al In P窗口层上,利用纳米热压印技术加工微圆锥阵列结构实现宽光谱减反射膜的方法。通过设计仿真,Al In P微圆锥阵列结构,可实现400~1 700 nm光谱范围内平均反射率2.5%。纳米热压印技术利用制作的模板,在温度达到PMMA聚合物玻璃...提出在Al In P窗口层上,利用纳米热压印技术加工微圆锥阵列结构实现宽光谱减反射膜的方法。通过设计仿真,Al In P微圆锥阵列结构,可实现400~1 700 nm光谱范围内平均反射率2.5%。纳米热压印技术利用制作的模板,在温度达到PMMA聚合物玻璃转化温度之上后施加一定的压力将模板压印到PMMA聚合物表面,使得纳米级模板结构转移到样品上。采用Obduct纳米压印机,研究图形转移的优化参数,制备出了具有高分辨率的热压印图形,为实现Al In P微圆锥阵列结构打下了良好的基础。展开更多
Soft lithography is a low-cost and convenient method for the forming and manufacturing of micro/ nanostructures compared to the traditional optical lithography. In soft lithography, poly(dimethylsiloxane) (PDMS) s...Soft lithography is a low-cost and convenient method for the forming and manufacturing of micro/ nanostructures compared to the traditional optical lithography. In soft lithography, poly(dimethylsiloxane) (PDMS) stamps with relief structures have been widely used to transfer patterns. The traditional fabrication approach of PDMS stamps is time-consuming since the master has been occupied during the curing process. By adding and repeating fast nanoimprint step, many intermediate polymeric molds can be produced from the master and these molds can then be employed to replicate more PDMS stamps while the time used is close to that of the common way. We demonstrated this idea by three masters which were made by the DEM (Deepetching, Electroforming and Microreplicating) and FIB (Focused Ion Beam) techniques. The photos show that the patterns on the PMDS stamps successfully duplicated patterns on the origin masters.展开更多
基金supported by the National Basic Research Program of China (Grant No2010CB631005)National Natural Science Foundation of China (Grant Nos10625209,10732080,90916010)+1 种基金Beijing Natural Sciences Foundation (Grant No3072007)Program for New Century Excellent Talents (NCET) in Universities and Chinese Ministry of Education(Grant NoNCET-05-0059)
文摘The cross-section profiles of polymer deformation in the hot embossing lithography process were studied by finite element method for various temperature, time and pressure. In order to successfully fabricate high-frequency grating lines, an optimal imprint condition was selected and the related experiments were carried out. The fabricated gratings were illuminated by the SEM image and AFM analysis, which agree well with the simulated results. Therefore, the finite element methods are helpful for a better comprehension of the polymer flow phenomena governing the pattern definition and the design of optimum processing conditions for successful grating fabrication.
文摘提出在Al In P窗口层上,利用纳米热压印技术加工微圆锥阵列结构实现宽光谱减反射膜的方法。通过设计仿真,Al In P微圆锥阵列结构,可实现400~1 700 nm光谱范围内平均反射率2.5%。纳米热压印技术利用制作的模板,在温度达到PMMA聚合物玻璃转化温度之上后施加一定的压力将模板压印到PMMA聚合物表面,使得纳米级模板结构转移到样品上。采用Obduct纳米压印机,研究图形转移的优化参数,制备出了具有高分辨率的热压印图形,为实现Al In P微圆锥阵列结构打下了良好的基础。
文摘Soft lithography is a low-cost and convenient method for the forming and manufacturing of micro/ nanostructures compared to the traditional optical lithography. In soft lithography, poly(dimethylsiloxane) (PDMS) stamps with relief structures have been widely used to transfer patterns. The traditional fabrication approach of PDMS stamps is time-consuming since the master has been occupied during the curing process. By adding and repeating fast nanoimprint step, many intermediate polymeric molds can be produced from the master and these molds can then be employed to replicate more PDMS stamps while the time used is close to that of the common way. We demonstrated this idea by three masters which were made by the DEM (Deepetching, Electroforming and Microreplicating) and FIB (Focused Ion Beam) techniques. The photos show that the patterns on the PMDS stamps successfully duplicated patterns on the origin masters.