02421nam a2200241 a 4500 vtls000081888 KUKTEM 20251117113226.0 141009t2013 my a f m 000 0 eng d THE0006899(Local) 201906131017 aida 201411051137 safura 201410091026 Fida UMP TK7868.P7 A45 2013 r Bc. Muhammad Aminuddin Adnan Effect of corrosion on printed circuit board / Muhammad Aminuddin Adnan Kuantan, Pahang : UMP, 2013 xiii, 54 p. : ill. (some col.) ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Mechanical Engineering (Automotive Engineering)) -- Universiti Malaysia Pahang - 2013 Bibliography : p.[55-57] Corrosion of electronic systems has been a significant issue in electronic industry nowadays. One of the most common corrosion type is the atmospheric corrosion. Therefore, even a small environmental impact can cause huge damages if the components are not well protected. When the device is in use, the large voltage gradients between points on a printed circuit board (PCBs) will accelerate the corrosion problems dramatically. The complexity of the atmosphere, as corrosion environment, results from atmosphere composition and from presence of some factors as pollutants, temperature, humidity, wind speed and direction. So, the objective of the study is to identify the effect of corrosion on solder joint and copper substrate in 0.5M Sulphuric acid (H2S0) in order to determine the corrosion rate of the substrate in duration time by using weight loss measurement method. Lead-free solder bump were used to form solder joint between lead-free solder Sn-3Ag-0.5Cu (SAC 305) solders with the plated copper substrate. The copper substrate surface finish was deposited by the electroless nickel. The result of study shows the corrosion on the substrate after immersed in 0.5M Sulphuric acid at 168 hours, 336 hours, and 504 hours. The effect of corrosion was increased with the time duration increased. The weight loss data indicated that the thickness of the substrate decreased with the time duration. The structure of the solder joint was analyze using scanning electron microscopy (SEM). Printed circuits 0 0 0 1 20000 20000 2019-09-04 0 TK7868.P7 A45 2013 r Bc. 0000086535 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 20000 20000 2019-09-04 0 CD 8207 | TK7868.P7 A45 2013 r Bc. 0000086536 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 5011 5017 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*9992