IC’s new generations:
VLSI or "very large-scale integration" started with hundreds of thousands of transistors (1980s), and continues beyond several billion transistors as of 2009
WSI or “Wafer-scale integration” uses an entire silicon wafer to produce a single "super-chip”, often used in massively parallel supercomputers.
SoC or “System on a Chip” integrates all the components needed for a system on a single chip (complex and costly).
3D-IC or “3-demenstional Integrated Circuit has two or more layers of active electronic components that are integrated both vertically and horizontally into a single circuit.