Patent ID: 7207763

Claim:
A wafer holder for a semiconductor manufacturing system that comprises a reaction tube and a dual boat, the reaction tube providing a semiconductor wafer with a sealed space to perform a process, the dual boat being arranged in the process space provided by the reaction tube and loading at least one semiconductor wafer, the dual boat including first and second wafer loading boats, the first and second wafer loading boats spaced from each other and moving up and down with respect to each other, the wafer holder being mounted on the dual boat, the semiconductor wafer being arranged on the wafer holder, a backside of the semiconductor wafer being hidden during a process, the wafer holder comprising: a holder body adapted to hide the backside of the semiconductor wafer during a process in the reaction tube and including a wafer lifter having a portion that can be disengaged from and coupled to the holder body so that a lower portion of the semiconductor wafer is supported by the dual boat and so that the semiconductor wafer can be lifted up from the holder body when the semiconductor wafer is loaded or unloaded; and a separation boundary arranged between the holder body and the wafer lifter and including a gas inflow interception surface adapted to hinder reaction gas from flowing through the separation boundary; wherein the wafer lifter includes support poles adapted to support at least three points of the semiconductor wafer in a side guard of the holder body; wherein the holder body includes through holes adapted to inset the support poles into and remove the support poles therefrom; wherein at least one of the support poles has a lifting rod arranged at a lower portion thereof, the lifting rod being adapted to be operated by the second wafer loading boat of the dual boat; and wherein the lifting rod has an insertion groove arranged at a lower portion thereof such that an end portion of the wafer support of a second wafer loading boat is adapted to be inserted into and coupled to the insertion groove.