Cooling enhancements in thin films using flexible complex seal due to temperature increase or thermal load increase

An apparatus comprising:

• a first substrate and a second substrate, the first substrate having a face in contact with at least one hot medium and having an other face in contact with a secondary gas;
• the second substrate having a face in contact with the secondary gas and having the other face in contact with a main gas;
• the faces of the first and second substrates in contact with the secondary gas are opposing each other;
• at least one flexible seal attached to the first substrate and to the second substrate to form first at least one closed enclosure comprising the secondary gas so that the second substrate moves relative to the first substrate when the secondary gas undergoes volumetric thermal expansion;
• and
• wherein the secondary gas has a thermal conductivity that is smaller than that of the main gas so that effective thermal insulation properties of said apparatus are improved when the secondary gas undergoes volumetric thermal expansion.

An apparatus, comprising:

• a first substrate and a second substrate, the first substrate having a face in contact with at least one hot medium and having an other face in contact with a secondary gas;
• the second substrate having a face in contact with the secondary gas and having the other face in contact with a main gas;
• the faces of the first and second substrates in contact with the secondary gas are opposing each other;
• at least one flexible seal attached to the first substrate and to the second substrate to form first at least one closed enclosure comprising the secondary gas so that the second substrate moves relative to the first substrate when the secondary gas undergoes volumetric thermal expansion;
• and
• wherein the secondary gas has a thermal conductivity that is larger than that of the main gas so that effective thermal conduction properties of said apparatus are improved when the secondary gas undergoes volumetric thermal expansion.