Printed high voltage flexible inorganic transistors

印刷高压柔性无机晶体管

• 批准号: DT/F002688/1
• 负责人: Andrew Flewitt
• 金额: $ 20.13万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=DT%2FF002688%2F1
• 关键词: Printed; voltage; flexible; inorganic; transistors

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.

目前需要具有适度信息内容的低成本柔性显示器。这种显示器将应用于例如洗衣机的控制面板，其中显示器与触敏面板集成。根据上下文，不同的信息显示在“直观触摸屏”上给用户，显示的按钮功能也会改变。Pelikon目前生产印刷分段电致发光（pSEL）显示器，最多可显示32段信息。然而，希望通过使用显示像素的全阵列来显著增加这些显示器的信息内容。该项目旨在开发一种革命性的新型柔性塑料基板显示器。该显示器将汇集Pelikon现有的显示技术，这是在一个柔性塑料（PET）基板与一个新的有源矩阵背板的电子控制显示器。这种有源矩阵由薄膜晶体管阵列组成，将直接制造在塑料基板上。这将涉及使用基于真空的等离子体沉积技术将氢化非晶硅层直接沉积到PET上（尽管也可能需要在塑料和非晶硅之间沉积中间阻挡层）。然后通过丝网印刷将厚膜电介质和导体层添加到硅半导体的顶部。剑桥大学将对不同的材料、层厚度和其他工艺参数进行实验，这些参数可能被判断为与正在构建的设备相关。Pelikon将对导电和介电材料的不同沉积参数进行实验，例如厚度和油墨配方。两家合作伙伴将共同开发最佳晶体管设计。一旦该项目制造出一个工作晶体管，将制造一个有源矩阵背板来驱动pSEL显示区域。Pelikon和剑桥大学将合作设计一种背板，其大像素数量少。Pelikon将建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AC电致发光显示器的原理的证明。在现有的pSEL显示技术中增加灵活的有源矩阵背板将为广泛的新应用开辟机会。存在各种消费电子应用，其中用于pSEL显示器的有源矩阵驱动器将是有利的。这些设施包括洗衣机、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器与当前标准pSEL图标合并在一起。这需要大量的段，这将只可能与一个有源矩阵背板。