A reaction system for processing semiconductor substrates is disclosed. In particular, the invention discloses an arrangement of a susceptor and a baseplate for when a substrate is placed into a reaction region. Magnets are embedded into the susceptor and the baseplate in order to create a gap between the two. As a result of the gap, the invention prevents an accumulation of gaseous materials that would exist in prior art systems as well as particle generation due to physical contact between parts.