Resources Contact Us Home
Target cooling and support for magnetron sputter coating apparatus

Image Number 5 for United States Patent #5409590.

A target of a thickness, which varies across its radius according to the amount of material required to be sputtered, is supported in a nest in a chamber of a sputter coating apparatus. Positioned behind the nest is a rotating magnet carrier having arranged thereon in a closed loop a permanant or electro magnetic strip, but preferably a flexible permanently magnetic material, with portions near the rim of the target and portions near, but not on, the target center about which the magnet rotates. The magnetic loop is transversely polarized with one pole toward the target rim and one toward the target center so that its field will enclose the rim of the target within a magnetic tunnel that traps a plasma over the target. Lumped magnets across the center from the strip support the plasma near the center so as to cause some sputtering at the target center. Other lumped magnets adjacent the strip help sharpen the field so that a desired distribution of sputtering can be achieved. Enclosed in a sealed space behind and in thermal contact with the target nest is the carrier from which the magnets project to facilitate the flow of cooling fluid across the back surface of the nest to cool the target as the carrier rotates.

  Recently Added Patents
Cucumber plants with a compact growing habit
Fusing apparatus and image forming apparatus provided with the same, and heating apparatus
Method and system for filtering home-network content
Nuclear fuel assembly bottom nozzle
Attribute information providing system
Medical imaging probe with rotary encoder
  Randomly Featured Patents
Multistage process for converting oxygenates to liquid hydrocarbons and ethene
Apparatus and method to handle power supply failures for a peripheral device
Magnetic recording tape having large particles in magnetic recording layer
Depression sensor for an electronic ignition advance device for an internal combustion engine
Medication minder device
Document transport apparatus and document transport method, and image reading apparatus
Internal combustion engine provided with double system of fuel injection
One-way clutch for auger agitator
Process for producing nonaqueous dispersion-type resin
Discharge arrangement of a compressor having a plurality of compression chambers