The subject of my thesis was the selective wave soldering, I started studying this technology at the beginning of the semester. After getting familiar with the maintenance and operation of the Pillarhouse Jade S200, I made soldering experiments on various circuit boards.
I have learned the basics of selective wave soldering on single sided and double sided printed wiring boards. After a short period of practice I got familiar with the prevention of the most common soldering mistakes, such as solder bridge and poor hole filling.
The main topic of my thesis was examining the selective solderability of the 96 pin straight euro connector of the Lightware MX-DVI-MB32 multilayer board. I made my examinations using a Pillarhouse Jade S200 selective wave soldering machine with lead-free solder, and I also used a Pillarhouse Jade Handex soldering machine with lead solder at an external company. My aim was to reach the predetermined soldering requirements. I started my examinations with setting up the proper thermal profile, after that i did soldering experiments. I controlled the solder joints with X-ray and cross sections. By proper settings, I succeeded to reach complete through hole filling on every leg of connector.
To specify the whole soldering cycle, further investigations must be made on the solderability of the other connectors. I did not make progress on shortening the soldering cycle time of the MB32 motherboard, that would need further examinations and optimalization.