Department of Mechanical Engineering, Hanyang University, Seoul 133-791, Korea.
Nanotechnology. 2013 Jul 5;24(26):265702. doi: 10.1088/0957-4484/24/26/265702. Epub 2013 Jun 3.
Laser sintering of metal nanoparticles is a key technology for high-performance printed electronics fabricated on heat-sensitive substrates such as glass or plastic. Although laser-sintered electronic devices have been successfully fabricated, the role of the induced temperature field in the laser sintering process has not been reported thus far. In this work, the effect of temperature on the laser sintering process is described for the first time using a two-dimensional transient heat conduction equation for inkjet-printed silver nanoparticle ink. The in situ electrical resistance was measured to estimate the transient thermal conductivity and hence the temperature of the sintered ink during the laser sintering process. To verify the estimated laser sintering temperature, the morphology of furnace-sintered silver nanoparticle ink was compared with that of laser-sintered ink. The electrical characteristics and surface morphology of laser-sintered ink are found to be related to the process temperature.
金属纳米粒子的激光烧结是在诸如玻璃或塑料等热敏衬底上制造高性能印刷电子产品的关键技术。尽管已经成功制造出激光烧结的电子器件，但迄今为止尚未报道激光烧结过程中感应温度场的作用。在这项工作中，首次使用喷墨打印银纳米粒子油墨的二维瞬态热传导方程来描述温度对激光烧结过程的影响。通过原位电阻测量来估计瞬时热导率，从而估算激光烧结过程中烧结油墨的温度。为了验证所估计的激光烧结温度，将炉烧结银纳米粒子油墨的形貌与激光烧结油墨的形貌进行了比较。发现激光烧结油墨的电特性和表面形貌与工艺温度有关。
