Reliability Study Of Printed Electronics On Flexible Substrate For Automotive Lighting Application

Mohd Amin, Siti Khuzaimah (2019) Reliability Study Of Printed Electronics On Flexible Substrate For Automotive Lighting Application. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This research demonstrates the effect of different geometrical parameter on the reliability performance of the printed circuit. The circuit thickness is fixed at 1 mm while the width are varied at 1 mm, 2 mm and 3 mm. The square-shaped circuit pattern is printed on PET substrate by using the screen-printing method. The samples are tested in both functionality and reliability performances. Functionality test result shows that thicker line width contribute to lesser sheet resistivity, which will increase the electrical conductivity. The initial sample’s sheet resistance also shows good compliance to the theoretical value provided by the Conductive Ink Technical Data Sheet. The samples are then exposed to twisting test and the overall resistance are recorded. The values are then compared with the preferred resistance value for a standard LED. The resistance comparison before and after application of mechanical load verified that the circuit will experience higher resistance and sheet resistance value. The measured resistance from this research shows exceptionally high reading; exceeding the needed resistance for LED lighting application. Theoretically, the LED, however, will be able to light up but it will contribute to electrical energy wastage since higher current are needed to overcome the high circuit resistance. Thus, it can be concluded that the printed circuit board in this research are only sufficient to act as the benchmark design for further improvement to serve industrial or market purpose.

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