Patent ID: 8898930

Claim:
A treatment method of a transport support for the conveyance and storage of substrates, including a treatment stage during which a surface to be treated on the transport support is subjected to the combined action of a subatmospheric gaseous pressure and heating using intermittent infrared radiation to remove foreign bodies from said surface to be treated by alternately cutting off and restoring power to an infrared radiation source in response to a representation of the temperature of the surface to be treated so as to maintain the temperature of the surface within a predetermined difference from a temperature setting wherein the transport support is first subjected to a primary vacuum, the subatmospheric pressure remaining greater than the pressure of the triple point of the diagram of the phases of the foreign bodies to be removed, and then the transport support is subjected to a secondary vacuum having a pressure lower than 0.1 mbar; wherein alternately cutting off and restoring power to the intermittent infrared radiation source includes a continuous initial stage of setting the surface to be treated to a temperature which does not degrade the transport support; and wherein the treatment method includes a conditioning stage, during which the surface to be treated is subjected to a progressive rise in gaseous pressure to around the atmospheric pressure, and to a drop in temperature to around the ambient temperature with injection of a clean gas flow, free from foreign bodies to be removed.