A method for producing hyperthermal molecular hydrogen is disclosed and use of same for selectively breaking C\u2014H or Si\u2014H bonds without breaking other bonds are disclosed. The heat and pressure roller applies heat and pressure to the green sheet to bring the green sheet into intimate contact with the plasma display panel substrate and to remove residual solvent from the green sheet. The fins define a receiving channel therein, which is slantwise to two opposite sides of the heat sink. The different effective indices of the two coupled waveguides result in the even and odd modes becoming highly asymmetric.