copper chip


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copper chip

A chip that uses copper rather than aluminum in the top metallization layers, which interconnect all transistors and components together. Copper provides better performance, because it has less resistance than aluminum. Resistance increases as the lines (tracks) get smaller. In order to accommodate ever-decreasing die sizes, materials with inherent less resistance are required. Copper might have been used earlier, but it diffused into the silicon until IBM discovered a way to prevent that from happening. IBM delivered the first copper-based microprocessors in 1998. See metallization layer.
References in periodicals archive ?
In addition, the company stated it will immediately broaden the use of copper in the marketplace by building copper chips for other companies through its standard foundry services.
The new SP system is based on the 64-bit, 375 MHz POWER3-II microprocessor, a powerful copper chip developed for IBM's RS/6000 servers and workstations.
IBM, San Diego, Calif., has introduced the industry's first supercomputer powered by copper chip technology and has announced a milestone in copper chip manufacturing -- the two- millionth copper chip.
While the S80 uses the new 450 MHz Pulsar processor (which is basically a Northstar processor re-implemented in IBM's CMOS-7S copper chip fabrication process) and a whole new memory subsystem and high-bandwidth I/O subsystem to match it, the AS/400 I-Stars were going to use a faster 560 MHz processor in the same S80 frame.
SOI, which comes just 11 months after IBM's previous microchip breakthrough - the copper chip - can require as little as one third of the power used by current chips, IBM said.
It added that the design and circuits used in the project will eventually be applied to chipsusing its recently introduced "copper chip" technology.
The Pulsar chips due to appear on September 12 with IBM Corp's revamped RS/6000 workstation and server lines (see Top Stories ) will use IBM's 0.22 micron CMOS-7S copper chip fabrication process rather than the 0.35 micron CMOS-6S2 process used in the Northstars.