Printed high voltage flexible inorganic transistors

目前需要具有中等信息内容的低成本、柔性显示器。这种显示器将在例如洗衣机的控制面板中找到应用，其中该显示器与触敏面板集成在一起。根据上下文的不同，不同的信息会显示在“直观触摸屏”上，所显示的按钮的功能也会发生变化。Pelikon目前生产的印刷分段电致发光(PSEL)显示器具有多达32个信息段。然而，希望通过使用全阵列的显示像素来显著增加这些显示器的信息内容。该项目旨在开发一种在柔性塑料基板上显示的革命性新形式。该显示器将结合Pelikon现有的显示技术，该技术是在柔性塑料(PET)基板上制造的，并配备了新的电子有源矩阵背板来控制显示器。这种有源矩阵由一系列薄膜晶体管组成，将直接在塑料衬底上制造。这将涉及使用基于真空的等离子体沉积技术直接在PET上沉积一层氢化非晶硅(尽管在塑料和非晶硅之间也可能需要沉积中间阻挡层)。然后，通过丝网印刷在硅半导体的顶部添加厚膜介质层和导体层。剑桥大学将用不同的材料、层厚和其他工艺参数进行实验，这些参数可能会被判断为与正在建造的设备相关。Pelikon将试验不同的导电和介电材料沉积参数，如厚度和油墨配方。这两家合作伙伴将共同开发最佳晶体管设计。它的目的是，一旦这个项目已经制造出一个工作的晶体管，一个有源矩阵背板将被制造来驱动pSEL显示区域。Pelikon和剑桥大学将合作设计一款具有少量大像素的背板。Pelikon将制造必要的电子设备来驱动背板。这将是印刷高压无机晶体管阵列驱动印刷交流电致发光显示器的原理证明。在现有的pSEL显示技术基础上增加灵活的有源矩阵背板，将为广泛的新应用打开机会。在各种消费电子应用中，用于pSEL显示器的有源矩阵驱动器将是优势。这些设备包括洗衣机、冰箱/冰柜、洗碗机、微波炉和健身机。这些应用通常需要将字母数字显示与当前标准pSEL图标结合在一起。这需要大量的段，只有有源矩阵底板才能做到这一点。

There is currently a need for low cost, flexible displays which have a moderate information content. Such displays will find applications in, for example, the control panel of a washing machine, where the display is integrated with a touch-sensitive panel. Depending on the context, different information is displayed on the 'Intuitive Touch Display' to the user and the function of the buttons displayed also changes. Pelikon currently manufacture Printed Segmented Electroluminescence (pSEL) displays with up to 32 segments of information. However, there is a desire to significantly increase the information content of these displays through the use of a full array of display pixels. This project is intended to develop a revolutionary new form of display on a flexible plastic substrate. The display will bring together Pelikon's existing display technology which is made on a flexible plastic (PET) substrate with a new active matrix backplane of electronics to control the display. This active matrix, which consists of an array of thin film transistors, will be fabricated directly onto the plastic substrate. This will involve the deposition of a layer of hydrogenated amorphous silicon using a vacuum-based plasma deposition technique directly onto the PET (although it is possible that an intermediary barrier layer will also need to be deposited between the plastic and the amorphous silicon). Thick film dielectric and conductor layers will then be added on top of the silicon semiconductor by silk screen printing. Cambridge University will experiment with different materials, layer thicknesses and other process parameters that may be judged to be relevant to the devices being constructed. Pelikon will experiment with different deposition parameters of the conductive and dielectric materials, such as thickness and ink formulation. The two partners will work together to develop the optimal transistor design. It is intended that once this project has made a working transistor, an active matrix backplane will be made to drive a pSEL display area. Pelikon and Cambridge University will work together to design a backplane with a small number of large pixels. Pelikon will build the necessary electronics to drive the backplane. This will be a proof of principle of a printed high voltage inorganic transistor array driving a printed AC electroluminescent display. The addition of a flexible active matrix backplane to the existing pSEL display technology will open up the opportunity for a wide range of new applications. There are various Consumer Electronic applications in which an active matrix drive for a pSEL display would be an advantage. These include washing machines, fridge / freezers, dishwashers, microwaves and fitness machines. These applications often require alphanumeric displays to be incorporated alongside the current standard pSEL icons. This requires a large number of segments which will only be possible with an active matrix backplane.