Road map for the development of 2.5-D ICs

The stacked memory, or so-called stacked chip scale package (SCSP) memory, which has been in the market for a couple of years1 -41, could be considered as 

It can be observed from Fig. 7.3 that the requirement for peak memory bandwidth for NVidia GPUs has increased from 0.53 GB/s to 35.2 GB/s, or a factor of 66.7, in a period of 10 years beginning from 1994 (NVidia introduced its first GPU, NV1, in 1994). This momentum has to be continued with the adoption of advanced graphic features such as the 128-bit floating-point color depth and DVD quality real-time computer games. 

Although it already demonstrates many key advantages, the SCSP memory is of course not a fully 2.5-D integrated system yet. Most of all, the inter-chip 

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