Kokusai Electric Co., Ltd.

Yasuhiro Harada

Ryoji Saito

Toshikazu Karino

Shoichiro Izumi

Koji Tometsuka

A wafer transfer method and mechanism in a vertical CVD diffusion apparatus and a control device for the method and mechanism. The vertical-type CVD diffusion apparatus has a boat containing many wafers in a horizontal orientation, stacked vertically. Product wafers are transferred to the boat five by five, dummy wafers are transferred five by five or a fraction less than five, and monitor wafers are inserted one by one between a block of the product wafers and another block of the product wafers, or a block of the dummy wafers.

Wafer transfer mechanism in vertical CVD diffusion apparatus

A wafer transfer method and mechanism in a vertical CVD diffusion apparatus and a control device for the method and mechanism. The vertical-type CVD diffusing apparatus has a boat containing many wafers in a horizontal orientation, stacked vertically. Product wafers are transferred to the boat five by five, dummy wafers are transferred five by five or a fraction less than five, and monitor wafers are inserted one by one between a block of the product wafers and another block of the product wafers, or a block of the dummy wafers.

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Ome, Japan

Yasuhiro Harada