Packaging Technologies for Flexible Systems

The overall drive to smaller and lighter packages together with a continuously increasing I/O count has lead to an increase in interest in flexible substrates for electronic packaging. With the growing number of applications for flexible modules the variety of requirements for these packages increased as well. Different technologies had to be developed to meet the needs of products ranging from CSP’s over Smart Cards to complex systems e.g. medical implants. Different soldering techniques as well as adhesive joining processes have been optimized and qualified for flexible substrates. Simultaneously the development of thin flexible dies provided a key technology for flexible systems.