LITHOGRAPHIC APPARATUS AND APPARATUS ADJUSTMENT METHOD

    公开(公告)号:SG109555A1

    公开(公告)日:2005-03-30

    申请号:SG200404419

    申请日:2004-08-06

    Abstract: A lithographic projection apparatus comprises a support table for holding a substrate or a mask etc. across a beam path. The support table has a support surface and an array of protrusions extending from the support surface, so as to support a backside of the substrate etc. on the protrusions. A detector is provided for detecting height deviations of respective ones of the protrusions that affect a surface flatness of the substrate etc.. A position selective material removing and/or adding device, is arranged to act independently on individual protrusions when the substrate table is operable in the apparatus, in the case of a removing device with sufficient removing strength to remove part of the protrusion material from the individual protrusion. A control unit controls the material removing and/or adding device to remove and/or add an amount of material corresponding to respective detected height deviations of respective ones of the protrusions selectively from or to the respective ones of the protrusions.

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