Method and apparatus for holding a plurality of substrates for processing

A substrate carrier includes a carrier plate, a cover plate and a plurality of substrate support slots. The carrier plate has recesses for receiving substrates. A sidewall of each recess includes protrusions for engaging the OD of a substrate. The cover plate is rotatable and has a cam on an undersurface. The cam is enagageable with a lateral slot in each of a plurality of substrate supports of the carrier plate. Rotating the cover plate causes the cam to move the substrate supports, one by one, so a substrate engaging end of the substrate support moves away from an associated substrate recess. A substrate is loaded into the recess, whereupon the cover plate is rotated further so the cam disengages from the lateral slot. The substrate supports are biased to engage the OD of the substrate to lock the substrate within the recess. Other embodiments are described and claimed.