共查询到18条相似文献,搜索用时 156 毫秒
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文章是针对印制电路板生产过程中线路、阻焊的显影工序所产生的废显影液进行再生利用实践及研究,其工艺过程是废显影液在超滤工艺过滤后通过参数调整、清洗等一系列的工艺流程,实现显影液的循环再利用,减少废水的排放. 相似文献
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本文叙述一种用于剥离工艺的制备双层正性光刻胶结构的新工艺方法。此工艺方法的关键工序是在 CF_4等离子体中处理第一层光刻胶的表面以形成一薄的缓冲层,该层对紫外线是透明的,并且在光刻胶溶剂中和碱性水显影液中是不可溶的。选用 AZ-2400和 AZ-1300系列正性光刻胶制作出“凸缘”型光刻胶剖面图形以适合剥离应用。能很干净地剥离出高1μm、宽1μm 的铝线条。制作了一个1μm×1μm 的栅格结构以证实此新双层光刻胶工艺方法的分辨能力和钻蚀控制情况。最后叙述了1μm 栅 GaAs MES-FET 的制作以证实其应用。 相似文献
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带胶剥离工艺粘附性实验研究 总被引:1,自引:0,他引:1
带胶剥离是微电子工艺的常见工艺步骤.文章通过对带胶剥离的样品进行退火实验,研究了电极蒸发金属和不同基底的粘附特性.实验表明,带胶剥离工艺制备的电极,其金属与衬底的粘附性差,退火过程产生气泡,严重影响了器件的特性.蒸发温度、蒸发室真空度,以及基片表面的清洁度与气泡产生有密切的关系.从这几点入手,提出了相应的改进方法. 相似文献
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胡志勇 《现代表面贴装资讯》2007,6(1):57-60
我们在实施晶片的前段工艺处理(front-end-of-line简称FEOL)和后段工艺处理(back—end—of-1ine简称BEOL)的时候,往往需要采取无数次的清洗操作步骤。清洗的次数多少取决于晶片的设计和所需要的互连层数。实施清洗工艺的目的不仅是要剥离晶片表面的光刻胶,还要考虑去除各种复杂的蚀刻残余物质、金属颗粒物,以及其它的污染物,为此需要不断探索新的、更加精细的化学试剂。在考虑这些工艺操作的时候, 相似文献
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《Electron Devices, IEEE Transactions on》1985,32(3):672-676
The lithography of the metal wiring layers is becoming the most confining technology in the era of VLSI (very large-scale integration), as more and more circuits have to be wired on the chip itself. The two competing technologies are subtractive etch (wet or dry), and additive metal lift-off. As lift-off needs no etching, it inherently offers cost and density advantages. It, however, requires an undercut photoresist profile. These undercuts can be achieved with an image-reversal process. The paper describes such a reversal process, especially tuned for lift-off applications. The result is a simple single-layer lift-off technology with excellent image quality. 相似文献
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LED加工工序中,需要对晶圆表面进行去胶处理。针对LED去胶工序研究了一种去胶方法,并开发出了一种享有专利的晶圆表面金属剥离及光刻胶去除工艺及自动去胶设备,该工艺方法可去除LED表面金属层及光刻胶,并且将人工去胶的三道工艺程序整合到一起。采用该方法的全自动去胶设备,通过实验比对,能够达到良好的LED晶圆去胶良率。结尾列出了利用该方法与目前常见的人工去胶相比的多种优点。 相似文献
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A nonlithographic process is demonstrated for patterning Al, Cr, Cu, Ni, Ti, and W thin films, which are widely used in microelectronic and display fabrication. A projection photoablation process using 248-nm-deep ultraviolet radiation from a KrF excimer laser was used to pattern a polyimide film coated on a SiN layer deposited on glass. The photoablation-patterned polyimide film was used as a sacrificial layer in a lift-off patterning process for the metal films, which resulted in clean metal patterns with fine line-edge definition being fabricated after lift-off. This process provides a simpler and more economical patterning technique compared to conventional lithography methods, eliminating the developing and etching steps. 相似文献
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This paper proposes two metal patterning processes. In each process, nanoimprint lithography (NIL) is used with commercialized particle-based silver nanoink which has appropriate properties for NIL. One process is a direct NIL process with a polydimethylsiloxane (PDMS) stamp; the other is a combined NIL and lift-off process. The direct NIL process is executed by using a xylene-absorbed PDMS stamp to decrease the curing time and minimize the residuals. A flexible PDMS stamp can also be wrapped around a quartz cylinder and used as a roll stamp to enlarge the patterned area. The direct NIL process successfully produced silver line patterns in the range of 200–300 nm, and the combined NIL and lift-off process successfully produced silver line patterns in the range of 15–60 nm. 相似文献