Patent ID: 8718456

Claim:
Surface heating device for a substrate treatment device for essentially surface radiation of heat perpendicular to a main plane, comprising a jacket tube heater with at least three straight tube sections arranged in a common plane parallel and equidistant to each other and bent tube sections, electrically heatable by a resistance heating wire via two common current connections arranged on two ends of the jacket tube heater, wherein at least two straight tube sections are arranged parallel to each other in the main plane and have ends connected to each other by bent tube sections with at least one adjacent straight tube section arranged in the main plane or in a parallel secondary plane, and wherein at least part of the bent tube sections is aligned sloped from the main plane; and wherein a first bent tube section includes three half-circles, in which a first half-circle leads from a first end of a first straight tube section from the main plane into the parallel secondary plane and there grades into a second half-circle that lies in the secondary plane and the second half-circle grades into a third half-circle that leads back from the secondary plane into the main plane and there grades into a first end of a second straight tube section.