Patent ID: 7494562

Claim:
A vapor phase growth apparatus, comprising: a plurality of rotation susceptors to hold a semiconductor wafer; a disk-like revolution susceptor on which the plurality of rotation susceptors are rotatably mounted through a bearing; and a common gear located at the periphery of the revolution susceptor, the common gear comprising: a main body portion; and a projected portion located at an upper part of said common gear, an outermost end of said projected portion of said common gear being projected from said main body portion of said common gear, wherein the plurality of rotation susceptors are annularly disposed on the periphery of the revolution susceptor, wherein a periphery of the plurality of rotation susceptors comprises: a pinion gear, said pinion gear comprising a projected portion disposed at an upper portion of said periphery of the plurality of rotation susceptors; and a bearing holding portion of the plurality of rotation susceptors, said bearing holding portion aligned with an outermost end of said projected portion of said pinion gear, said bearing holding portion meshing with said outermost end of the projected portion of said common gear at a position directly above the bearing at said projected portion of said pinion gear to form a gear mesh portion, wherein said main body portion of said common gear is formed outside said pinion gear, and wherein said outermost end of said projected portion of said pinion gear located at said upper portion of said periphery of the plurality of rotation susceptors is substantially aligned with said outermost end of said projected portion of said common gear located at the periphery of the revolution susceptor.