METHOD AND APPARATUS FOR FILLING A GAP
    36.
    发明申请

    公开(公告)号:US20190295837A1

    公开(公告)日:2019-09-26

    申请号:US16317774

    申请日:2017-07-14

    Abstract: There is provided a method of filling one or more gaps by providing the substrate in a reaction chamber and introducing a first reactant to the substrate with a first dose, thereby forming no more than about one monolayer by the first reactant on a first area; introducing a second reactant to the substrate with a second dose, thereby forming no more than about one monolayer by the second reactant on a second area of the surface, wherein the first and the second areas overlap in an overlap area where the first and second reactants react and leave an initially unreacted area where the first and the second areas do not overlap; and, introducing a third reactant to the substrate with a third dose, the third reactant reacting with the first or second reactant remaining on the initially unreacted area.

    Semiconductor device fabrication using etch stop layer

    公开(公告)号:US10199223B2

    公开(公告)日:2019-02-05

    申请号:US15413848

    申请日:2017-01-24

    Abstract: An etch stop layer comprises a metal oxide comprising a metal selected from the group consisting of metals of Group 4 of the periodic table, metals of Group 5 of the periodic table, metals of Group 6 of the periodic table, and yttrium. The metal oxide forms exceptionally thin layers that are resistant to ashing and HF exposure. Subjecting the etch stop layer to both ashing and HF etch processes removes less than 0.3 nm of the thickness of the etch stop layer, and more preferably less than 0.25 nm. The etch stop layer may be thin and may have a thickness of about 0.5-2 nm. In some embodiments, the etch stop layer comprises tantalum oxide (TaO).

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