Abstract
3D integration technology is the key for future LSIs with high-performance, low-power and multi-functionality. Especially, to mitigate various concerns caused by device scaling down to 10 nm or less, it is indispensable to introduce a new concept of heterogeneous 3D integration in which various kinds of materials, devices and technologies are integrated on a Si substrate. Future prospects of such a heterogeneous 3D integration technology has been discussed representing typical examples of heterogeneous 3D LSIs after the present situation of 3D integration technology is described.
