Abstract
An apparatus that includes a holder body configured to hold a substrate at edge portions of the substrate. The holder body includes a first layer and a second layer parallel to the first layer, forming a slot between the two layers to receive the substrate. The apparatus further includes one or more detent rotational locking mechanisms attached to the holder body. The apparatus further includes one or more bar leaves positioned within the slot and attached to the one or more detent rotational locking mechanisms. The one or more detent rotational locking mechanisms are configured to provide a clamping force to hold the substrate positioned between the one or more bar leaves and the holder body.