Substrate processing apparatus and substrate processing method

    公开(公告)号:US10325787B2

    公开(公告)日:2019-06-18

    申请号:US14781077

    申请日:2014-03-25

    Abstract: According to one embodiment, a substrate processing apparatus (1) includes: a support (4) configured to support a substrate (W) in a plane; a rotation mechanism (5) configured to rotate the support (4) about an axis that crosses a surface of the substrate (W) supported by the support (4) as a rotation axis; a plurality of nozzles (6a, 6b, 6c), which are aligned from the center toward the periphery of the substrate (W) supported by the support (4), configured to eject a treatment liquid to the surface of the substrate (W) on the support (4) being rotated by the rotation mechanism (5), and a controller (9) configured to control the nozzles to eject the treatment liquid at different ejection timings according to the thickness of a film of the treatment liquid formed on the surface of the substrate (W) on the support (4) being rotated by the rotation mechanism (5).

    Device and method for treating a substrate with hydrofluoric and nitric acid

    公开(公告)号:US09972513B2

    公开(公告)日:2018-05-15

    申请号:US15450542

    申请日:2017-03-06

    CPC classification number: H01L21/6708 H01L21/67017 H01L21/67253

    Abstract: According to the embodiment, a substrate treating device 10 for treating a semiconductor wafer W using an etchant L containing hydrofluoric acid and nitric acid includes a storage tank 210 that stores the etchant L; a concentration sensor 256 that measures a concentration of nitrous acid in the etchant L; an alcohol feeding line 280 that feeds IPA to the etchant L and maintains the concentration of nitrous acid to a predetermined value or more; and a substrate treating unit 100 that feeds the etchant L in the storage tank 210 to the semiconductor wafer W. The substrate treating device can improve the etching efficiency by efficiently generating nitrous acid, and thereby producing an etchant having a nitrous acid concentration suitable for etching.

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