신축성 필름용 전극형성을 위한 스크린인쇄용 Carbon Paste의 제조 및 물성 연구

Abstract

A study of Carbon paste for elastomer film electrode on Screen Printing type Manufacture and Properties

Ho Sang Lee

Dept. of Printing Engineering, Graduate School, Pukyong National University

Abstract

For an alternative method technology of the etching method and the vapor deposition, the technology of the printed electronics is used in various fields such as a display, a semiconductor and RFID. The printing method has many advantages which existing methods don’t have like the possibility of patterns of a thin film, forming the micro patterns, increasing the productivity and decreasing the toxic substance by the continuous production of the product.

Therefore, the industry of the printed element is highly growing. The contact formation through a method of a screen printing forms the thick film compared to other printing methods and can do the printing process continuously. The conductive paste which is used in the printing method shows shear thining and the characteristic of the paste rheology can be the standard to evaluate the paste.

In this paper, the researched conductivity carbon paste is made for the screen printing and its purpose is to make the carbon paste which has the excellent conductivity and adhesion for the flexible film which is used for Haptic Actuator. Also, another goal is that the printing film is not taken off and to play a role as the electrode when the modification of the film occurs.

As the way to evaluate, the state of paste was evaluated when viscosity, G′ (storage modulus) and G″ (loss modulus) were printed using Rheometer and according to the ratio of the dispersant, how the electrical conductivity and the adhesion change was also evaluated through testing the adhesion and the electrical conductivity using the dispersant. Also, when doing the screen printing in accordance with the size, the form and the characteristic of the particle of powder, the flow characteristic, and the weatherproof and the conductivity which can be gained after the dehydrating process were evaluated.