Industry 4.0 for Advanced Inspection

Abstract

This advanced technical solution combines the strongest in line inspection technology, which is 3D AOI with At-Line X-ray technology, giving Real Process Management.But as so often it is not so easy to turn it into reality, it requires a real commitment from different companies with differing software platforms and methods of operation. Let’s look at the issues of achieving Real Process Management; In-line X-Ray has some challenges in this environment due to False Fails and Escapes, in short if you do not have accurate data you cannot achieve improvement easily or cost effectively. So, we promote 3D AOI as a faster, more technically advanced solution, but even these systems have an Achilles Heel, they cannot inspect joints on Bottom Terminated Components (BGA’s, CSP’s, QFN’s etc.) As they have only vision and height measurement, they can measure flatness and co planarity very well, but as in line x-ray they have to make a decision based on assumptions. Or at least that was the issue until now, when a technology is available to link 3D in-line AOI to At-Line X-Ray, allowing a decision to be made based on information from both systems, indeed SPI results and Pre-Reflow AOI results can also be considered.The technology works like this: any height measurement of a BTC which the in-line 3D AOI “fails” is relayed to the At-Line X-ray and evaluated by its operator using all the technology at his disposal including ICT which gives a detailed view of all hidden joint interfaces.The results and images are then fed to a Management Information System where a technician can review the SPI data, the 3D AOI data and the x-ray results, in real time on the same monitor. He can now use his judgment to accept or fail the board, can review historic data trends to fine-tune the AOI height limits and continuously improve the process by Intelligent Feedback. The use of a brain to filter the algorithms and images to ensure maximized yields, reduced rework and lower costs. This data can then be archived and shared with other lines, other factories or even with customers.Reports can be made available to senior managers and customers showing the results of this Process Management, which is improved yields and reduced rework. In short, a process fully under control and utilizing the application of knowledge, tools and systems to measure, control, report and improve processes with the goal to meet the customer requirements profitably.