Patent ID: 8596200

Claim:
A wafer transfer system, comprising: a bidirectional wafer carrying pod, which comprises a housing and two doors respectively and detachably installed on the two opposite sides of the housing; an over-head transport (OHT) rail, which comprises a single rail section and a double rail section, the double rail section having two sub-tracks arranged with a predetermined separation in between, wherein the corresponding ends of the sub-tracks double rail section jointly connect to the single rail section; an OHT vehicle movably installed on the OHT rail for transferring the bidirectional wafer carrying pod; and two platforms, each respectively arranged proximate the corresponding sub-track of the double rail section, each platform having at least one loading port, wherein the loading ports of the platforms are respectively arranged underneath the corresponding sub-tracks; wherein, the bidirectional wafer carrying pod can be selectively transferred to one of the sub-tracks of the double rail section and disposed on the loading port of the corresponding platform double rail section.