Flip Chip Technologies and Their Applications in MEMS Packaging

Abstract

The high cost and undesirable bulky packages have been and continues to be major stumbling blocks in commercializing MEMS products. Flip chip technologies are very promising techniques for MEMS packaging. This paper presents a brief introduction of flip chip technologies as well as examples of successful applications of flip chip technologies in MEMS (e.g. RF and optical MEMS, micro sensors) packaging. The result shows that, although MEMS packaging is much more complicated than that for microelectronics, flip chip technologies can be applicable means of integrating MEMS devices. It is also shown that to meet different packaging requirements of various MEMS devices, bumping materials, bumping process and joining methods must be chosen carefully. Issues, such as package deformation, temperature distributions, heat sink placement, are all very crucial for the performance of MEMS devices and should be considered in MEMS packaging design.