Circuit defects detection of flexible printed circuit by electrophoretic deposition of organic DYE

Napi, Fauziah (2016) Circuit defects detection of flexible printed circuit by electrophoretic deposition of organic DYE. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This project cover the Investigation of circuit defects of Flexible Printed Circuits (FPC) based on Electrophoretic Deposition method (EPD). EPD was purpose as a new method replacing Optical Microscopy and visual inspection to improve the defects detection of FPC due to difficulties in differentiate conductive material and non- conductive material. The objective of this project is to determine suitable parameters for Electrophoretic Deposition (EPD) method on conductive material, to investigate circuit defects on FPC using EPD and to validate circuit defects on FPC using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD) and Optical Microscopy (OM). Methylene blue suspension and Carmoisine dye suspension have been used in this project to determine a suitable solution for EPD on FPC. Optimum EPD parameters for Methylene Blue suspension are 1.5 mM concentration of MB with 0.3 mM concentration of AlCl3 with total volume of solution is 50 ml. The optimum EPD parameters for Methylene Blue suspension are 50V voltage applied in 10 minutes deposition time. While for second solution, Carmoisine dye suspension, optimum parameters used for EPD are 5 g of Carmoisine powder with 45ml of distilled water to produce 50 ml total volume of solution. The EPD process for Carmoisine dye suspension involve 5 V of voltage applied in 5 minutes deposition time. However, Carmoisine dye suspension have been used for EPD on FPC because the yield of deposited dye from Carmoisine dye suspension are better than Methylene Blue suspension even at low voltage applied. It is recommended for further research on dye that can be dispersed in distilled water and can be repeatedly use for economical purpose.

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