PDC02: Principles and Practice of Developing Soldering Profiles
*Ray Prasad, Ray Prasad Consultancy Group Sunday, September 22 | 8:30am — 12:00pm
Course Objectives This course is based on IPC 7530 Guidelines for Temperature Profiling for Mass Soldering Processes chaired by Ray Prasad. The focus of this course is to focus on dos and dont’s of developing thermal profiles for widely used soldering processes in order to reduce soldering defects and improve quality and reliability.
During soldering it is critical that all solder joints reach the minimum soldering temperature. But what is that minimum temperature and most importantly how do you measure it? And how do make sure that those temperatures remain valid over the life of that product in production. There are many alloys in both tin-lead and lead free including low temperature soldering processes that are being used today and being soldered by various soldering methods. But it is surprising how many companies use incorrect profiles. Even those who may think they are using correct soldering profiles are using wrong profiles since they measure and monitor those profiles incorrectly. Incorrect thermal profiles can damage or warp components and boards. The problem becomes even more complex when you have a board with components of different size and thermal mass and even of different soldering alloy combinations – all on the same board to be soldered at the same time.
Topics Covered 1. An Overview of various soldering process and their Profiles 1.1. Mass Soldering Process (wave and reflow 1.2. Thermal shock Prevention for Wave 1.3. Application Specific Soldering Processes (vapor phase, laser and Selective Soldering) 2. Soldering zones, Profiles and Profilers 3. Super heat, Peak, TAL and True TAL 4. Recommended Profiles for tin lead, lead free and mixed alloys 5. Methods and locations for attaching thermocouples for BGAs – Dos and Donts 6. Monitoring and Controlling Oven Performance 7. Examples of Good and Bad Profiles and related defects 8. Review, Questions and Answers
Sunday September 22, 2019 8:30am - 9:30am CDT
Room 52
