| Summary: | 碩士 === 國立中正大學 === 機械工程所 === 95 === In this article, we present the technique of laser-induced forward transfer (LIFT) to deposit the carbon nanotube (CNT) and silver paste simultaneously on a variety of substrates for the purpose of field emission display at room temperature and in ambient environment. The Nd:YAG laser at the wavelength of 1064 nm was used as the light source. It was observed the types of transferred pattern were different as the laser fluence was switched from low, 0.4 J/cm2, to high, 1.96 J/cm2. Field emission measurements showed that a low turn-on field of 2.5 V/mm was obtained and the current density could reach 2.5 mA/cm2 as field voltage was at 3.67 V/mm. A lifetime test demonstrated that the field-emitted current dropped from its initial value of 6.55 mA/cm2 to 4.22 mA/cm2 during the first 12 hours and no significant degradation of 4.22 mA/cm2 more than 50 hours. In addition to its inherent straightforwardness and low cost in processing, the present method also shows the possibility of avoiding any post-treatment or activation processes that often used in the screen-printing method.
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