As today's silicon technology reaches its technical limits in many areas, developers are looking for new ways to design better chips. Typically, they look for ways to make chips faster, more energy efficient, and cost-effective, while still using current fabrication techniques and materials. In light of this, companies are working on high-rise, multilayer chips. Instead of laying out the vast majority of a chips' circuitry on a single layer of silicon, they are making chips with circuitry arranged vertically as well as horizontally.