摘要:
State of the art Integrated Circuits (ICs) encompass a variety of circuits, which have a wide variety of contact densities as measured in regions from 10 to 1000 microns in size. Fabrication processes for contacts have difficulty with high and low contact densities on the same IC, leading to a high incidence of electrical shorts and reduced operating speed of the circuits. This problem is expected to worsen as feature sizes shrink in future technology nodes. This invention is an electrically non-functional contact, known as a dummy contact, that is utilized to attain a more uniform distribution of contacts across an IC, which allows contact fabrication processes to produce ICs with fewer defects, and a method for forming said dummy contacts in ICs.
摘要:
An embodiment relates generally to a chemical mechanical polishing apparatus. The apparatus includes a platen adapted to receive a wafer to be chemical-mechanically polished and a polishing pad configured to polish the wafer. The apparatus also includes a slurry feed line configured to provide slurry to the polishing pad and at least one slurry dispensing outlet coupled to the slurry feed line and configured to dispense slurry as a mist of small droplets ranging from submicron to about 500 microns.
摘要:
The present invention relates to a method for performing chemical mechanical polishing. A high down-force step is performed. A low down-force step is performed. At least one of the down-force steps is modified, based on if one of the down-force steps exceeds an acceptable tolerance associated therewith. Other systems and methods are also disclosed.