3.
    发明专利
    未知

    公开(公告)号:DE60104395D1

    公开(公告)日:2004-08-26

    申请号:DE60104395

    申请日:2001-04-19

    Abstract: The present invention relates to a recycling procedure for 300 mm nitride dummies which have been previously provided with a special stabilization layer made of silicon dioxide. The recycling procedure is essentially based on selectively wet etching the deposited silicon nitride with respect to the silicon dioxide stabilization layer, preferably with hot phosphoric acid at 160 DEG C. In particular, the present invention provides a method of handling a silicon wafer which is employed as a dummy wafer during a nitride deposition process, comprising the steps of depositing a silicon dioxide layer on the wafer surface, performing the nitride deposition process on the wafer to deposit silicon nitride or silicon oxinitride on the wafer surface until a predetermined layer thickness is reached, and etching the silicon nitride or silicon oxinitride layer selectively with respect to the silicon dioxide layer.

    9.
    发明专利
    未知

    公开(公告)号:DE60104395T2

    公开(公告)日:2005-07-21

    申请号:DE60104395

    申请日:2001-04-19

    Abstract: The present invention relates to a recycling procedure for 300 mm nitride dummies which have been previously provided with a special stabilization layer made of silicon dioxide. The recycling procedure is essentially based on selectively wet etching the deposited silicon nitride with respect to the silicon dioxide stabilization layer, preferably with hot phosphoric acid at 160 DEG C. In particular, the present invention provides a method of handling a silicon wafer which is employed as a dummy wafer during a nitride deposition process, comprising the steps of depositing a silicon dioxide layer on the wafer surface, performing the nitride deposition process on the wafer to deposit silicon nitride or silicon oxinitride on the wafer surface until a predetermined layer thickness is reached, and etching the silicon nitride or silicon oxinitride layer selectively with respect to the silicon dioxide layer.

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