SEMICONDUCTOR DEVICE AND ITS MANUFACTURING METHOD

    公开(公告)号:JP2001313296A

    公开(公告)日:2001-11-09

    申请号:JP2001081508

    申请日:2001-03-21

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To provide a barrier layer very effective for preventing diffusion of water and/or oxygen which is easily and reliably manufactured in an integrated circuit device including a copper structure. SOLUTION: In an integrated circuit, a diffusion barrier layer 18 made of a high density material for protecting a copper structure 40 from oxidation in the presence of oxygen or water being apt to bring about defects such as pin-holes is modified on site by oxidation of a material self-restrictively capable of making a protective oxide. This material is provided in contact with the high-density material preferably as a film 26. The protection for the copper structure 40 allows a high-conductivity copper to be used, combined with a known low-dielectric constant (low-k) material resistive to diffusion of oxygen and water.

    TEMPORARY OXIDATION OF DIELECTRIC MATERIAL FOR DUAL- DAMASCENE METHOD

    公开(公告)号:JP2001024060A

    公开(公告)日:2001-01-26

    申请号:JP2000139087

    申请日:2000-05-11

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To prevent invasion with a developer of SSQ dielectric material during the resist pattern formation by forming another resist pattern on the surface of an intermediate material, and then removing a part of the intermediate material and the other part of such material depending on the other resist pattern. SOLUTION: An etching process is executed to form an aperture 22' to a thin oxide layer 16 as an intermediate material depending on a pattern 20 generated in the resist 18 and also to form a recess 22 to the SSQ (silsesquioxane material) layer 14. The other resist layer 24 is coated on the surface of the oxide layer 16. This resist layer 24 is then exposed and developed to form a resist pattern 26. Moreover, depending on the pattern 26, it is then developed to generate an undercut 28' of a via resist 24. Thereafter, the via 27 is formed with the unisotropic etching process. As a result, while the resist pattern 26 is formed, the pattern is never invaded with the developer owing to the SSQ material.

    SHIELDED INTERCONNECTION FOR INTEGRATED CIRCUIT DEVICE

    公开(公告)号:JP2001308184A

    公开(公告)日:2001-11-02

    申请号:JP2001070270

    申请日:2001-03-13

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To provide a shielded interconnection for reducing capacitive coupling between interconnecting lines in an integrated circuit device having interconnecting lines isolated by an interlayer dielectric. SOLUTION: Interconnecting lines are provided with a thin side wall conductive shield isolated from interconnecting lines by a thin side wall dielectric. Crosstalk between adjacent lines in an interconnection layer is reduced by a side wall shield. The thin side wall dielectric material can be selected to reduce capacitance between the side wall shield and the interconnecting lines. An interlayer dielectric can be selected to enhance defect resistance and mechanical strength during fabrication of a device. A method for fabricating shielded interconnections is also provided.

    INTEGRATED ACTIVE MOISTURE AND OXYGEN GETTER LAYERS

    公开(公告)号:AU2003217368A1

    公开(公告)日:2003-09-09

    申请号:AU2003217368

    申请日:2003-02-06

    Applicant: IBM

    Abstract: An integrated circuit structure comprises a main dielectric layer having a top surface. A cavity having sidewalls is formed in the main dielectric layer. A liner is formed on the sidewalls of the cavity. A metal conductor such as copper is formed over the liner filling the lined cavity. A getter layer is formed in the structure which combines with oxygen/moisture to form inert reaction products thereof. The getter layer can be either a conductive material which can be included in the liner or a dielectric layer which can be formed on top of the main dielectric layer, buried in the main dielectric layer or below the main dielectric layer.

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