ETCHANT COMPOSITIONS AND RELATED METHODS
    13.
    发明公开

    公开(公告)号:US20240150653A1

    公开(公告)日:2024-05-09

    申请号:US18376226

    申请日:2023-10-03

    Applicant: ENTEGRIS, INC.

    CPC classification number: C09K13/06

    Abstract: Etchant compositions for selective etching of silicon nitride in the presence of silicon oxide and polysilicon are provided. The etchant compositions may achieve passivation of at least one of silicon oxide, polysilicon, or any combination thereof, while selectively etching silicon nitride, in a single step by applying the etchant composition to a substrate. The etchant compositions may comprise at least 60% by weight of phosphoric acid based on a total weight of the etchant composition; at least 1% by weight of water based on the total weight of the etchant composition; and no greater than 2% by weight of a metal oxidizer based on the total weight of the etchant composition.

    Precursors for silicon dioxide gap fill

    公开(公告)号:US10043658B2

    公开(公告)日:2018-08-07

    申请号:US15862205

    申请日:2018-01-04

    Applicant: Entegris, Inc.

    Abstract: A full fill trench structure is described, including a microelectronic device substrate having a high aspect ratio trench therein and filled with silicon dioxide of a substantially void-free character and substantially uniform density throughout its bulk mass. A method of manufacturing a semiconductor product also is described, involving use of specific silicon precursor compositions for forming substantially void-free and substantially uniform density silicon dioxide material in the trench. The precursor fill composition may include silicon and germanium, to produce a microelectronic device structure including a GeO2/SiO2 trench fill material. A suppressor component may be employed in the precursor fill composition, to eliminate or minimize seam formation in the cured trench fill material.

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