Analysis of Line width with Nano Fountain Pen Using Active Membrane Pumping

Abstract

The intention of this research was investigated the line width that is written by NFP(Nano Fountain Pen) using active membrane pumping in order to understand how to control it. The relationships between velocity of tip, concentration, and ink diffusion with line width were studied; it was found that variation of velocity of tip and concentration of ink affect directly to line width. Therefore, this study is shown a model of verifying line width through two conditions: velocity and diffusion.

Control of line width with active nano fountain pen (ANFP) for nano manufacturing

“…When tip is attached in the substrate to deform meniscus with pressure-this is shown in Fig. 5(a) [8]. So the capillary force makes a meniscus around the tip.…”

“…Fig. 5b [8] illustrates the change of meniscus shape when the tip is moved. In this case, the capillary force changes as formed in (3).…”

“…The rate transport from the tip can vary with a number of parameters, including the distance between the tip and the substrate, the velocity of the tip, the ink composition, surface roughness, energy of substrate, environmental conditions as temperature, pressure, and humidity. Changing the hydrophobicity of the surface substrate causes the energy of the surface to change, which affects the surface diffusion of inks and then makes the shape of the meniscus change [8].…”

“…Fig. 7 [8] illustrates the change of the meniscus shape. At initial time 0 t = , the height of the meniscus is k ; because water in meniscus is evaporated and meniscus is diffused simultaneously, the height of meniscus will be decreased.…”

“…In this case, some effects that are the velocity of patterning, initial mass of meniscus, the diffusion of ink, the coefficient of diffusion, the concentration, the relative humidity, etc form the line width. A modeling of line width for ANFP was introduced by Hwang about upper effects [8].…”