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Organic transistors manufactured using inkjet technology with subfemtoliter accuracy
A major obstacle to the development of organic transistors for large-area sensor, display, and circuit applications is the fundamental compromise between manufacturing efficiency, transistor performance, and power consumption. In the past, improving the manufacturing efficiency through the use of printing techniques has inevitably resulted in significantly lower performance and increased power consumption, while attempts to improve performance or reduce power have led to higher process temperatures and increased manufacturing cost. Here, we lift this fundamental limitation by demonstrating subfemtoliter inkjet printing to define metal contacts with single-micrometer resolution on the surface of high-mobility organic semiconductors to create high-performance p-channel and n-channel transistors and low-power complementary circuits. The transistors employ an ultrathin low-temperature gate dielectric based on a self-assembled monolayer that allows transistors and circuits on rigid and flexible substrates to operate with very low voltages. 更多阅读（英文）PNAS发表论文摘要

more about All-inkjet-printed flexible electronics and its manufacturing.

新喷墨技术可提高晶体管性能：科学家们最近开发出一种新的喷墨技术，其喷射出的墨点比一般机器的小一千倍，因此可以在软性塑料微芯片上打印出只有微米大小的银布线。这一新技术的应用不仅可以降低微芯片的制作成本和能源消耗，还可以提高晶体管的性能。相关论文发表在美国《国家科学院院刊》（PNAS）上。
Tsuyoshi Sekitani所在的研究小组对喷墨打印机的打印头施加高电压，从而使机内的墨点爆裂成直径大约一微米的小型墨点。通过使用由纳米银粒子和有机溶剂组成的墨水，研究人员成功地连续打印出仅两微米宽的银布线，尽管就当前的微处理器标准来说这一尺寸并不小，但是这已经可以满足一些简单的应用，比如柔性显示器。为在精细的有机晶体管层上打印，更小尺寸的墨点比现有的墨水更为安全。有机晶体管层是塑料微芯片的基础，若墨点的尺寸减小，墨水中具有潜在破坏性的溶剂会蒸发得更快。研究人员还发现，增压喷墨打印头打印出的银布线会在130摄氏度的时候熔化，而一般的喷墨打印机打印出的银布线需要150摄氏度，相比之下，更低的温度可以保证有机晶体管不会同时受损。研究人员利用这种新型技术制造出了可用的有机回路，上面布满了间距一微米的平行银布线，这是迄今为止打印出的晶体管中最小的活动“沟道”区。（来源：EurekAlert!中文版） http://www.sciencenet.cn/htmlpaper/20083251453395311590.html
（《国家科学院院刊》（PNAS），doi：10.1073/pnas.0708340105，Tsuyoshi Sekitani，Takao Someya）