title: Electrical characteristics of printed Ag nanopaste on polyimide substrate.
abstract: We investigated the effects of sintering temperature on the microstructural evolution and electrical characteristics of screen-printed Ag patterns. A conducting paste containing 20 nm Ag nanoparticles (73 wt%) was screen printed onto a polyimide (PI) substrate and sintered at a temperature of 150, 200, 250 and 300 degrees C for 30 min. The microstructures of the sintered patterns were examined using field emission scanning electron microscopy (FESEM). The resistivity under the application of a DC signal decreased with increasing temperature. In the frequency range from 10 MHz to 20 GHz, the S-parameters of the sintered Ag conducting patterns were measured. The S-parameters indicated that the insertion losses at high frequency decreased with increasing sintering temperature due to the formation of interparticle necking after sintering.
authors: School of Advanced Materials Science and Engineering, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440-746 Gyeonggi-do, South Korea.
authors: Young-Chul
authors: YC
authors: Lee
authors: Kwang-Seok
authors: KS
authors: Kim
authors: Jong-Woong
authors: JW
authors: Kim
authors: Jong-Min
authors: JM
authors: Kim
authors: Wansoo
authors: W
authors: Nah
authors: Seong-Hee
authors: SH
authors: Lee
authors: Seung-Boo
authors: SB
authors: Jung