Patent ID: 9153466
Filing Date: 2015-10-06
Classification: H01L

Abstract:
1. A wafer boat comprising two side rods and at least one back rod, the rods extending substantially vertically between a top member and a bottom member, the rods comprising vertically spaced apart recesses formed at corresponding heights, recesses at a same height facing generally inwards and towards each other thereby defining a wafer accommodation for receiving and supporting a wafer in a substantially horizontal orientation, wherein each recess includes a lower, upwardly facing surface comprising a first flat surface in an outward region of the recess which is inclined downward in an outward direction and a second flat surface in an inner region of the recess which is inclined downward in an inward direction, an intersection of the first and second surfaces forming a respective support edge for supporting the wafer, wherein the support edges are substantially horizontal and straight, and wherein the support edges are configured to contact the wafer less than 2 mm away from the wafer edge and wherein each second flat surface in the inner region of the recess is bounded at an inner side thereof by an inner edge that is rounded off.