METHOD OF MANUFACTURING EXTREME ULTRAVIOLET MASK WITH REDUCED WAFER NEIGHBORING EFFECT

    公开(公告)号:US20210247687A1

    公开(公告)日:2021-08-12

    申请号:US17244662

    申请日:2021-04-29

    Abstract: A method for manufacturing a reticle is provided. The method includes forming a first reflective multilayer over a mask substrate. The method also includes forming a capping layer over the first reflective ML. The method further includes depositing a first absorption layer over the capping layer. In addition, the method includes depositing an etch stop layer over the first absorption layer. The method also includes forming a second reflective multilayer (ML) over the etch stop layer. The method further includes forming a second absorption layer over the second reflective ML. In addition, the method includes forming an opening through the second absorption layer and the second reflective ML until the etch stop layer is exposed. The method also includes etching the etch stop layer and the first absorption layer through the opening until the capping layer is exposed.

    Assist Feature for a Photolithographic Process
    3.
    发明申请
    Assist Feature for a Photolithographic Process 有权
    光刻工艺的辅助功能

    公开(公告)号:US20160011501A1

    公开(公告)日:2016-01-14

    申请号:US14327834

    申请日:2014-07-10

    Abstract: A photomask having a partial-thickness assist feature and a technique for manufacturing the photomask are disclosed. In an exemplary embodiment, the photomask includes a mask substrate, a reflective structure disposed on the mask substrate, and an absorptive layer formed on the reflective structure. A printing feature region and an assist feature region are defined on the mask. The absorptive layer has a first thickness in the printing feature region and a second thickness in the assist feature region that is different from the first thickness. In some such embodiments, the second thickness is configured such that radiation reflected by the assist feature region does not exceed an exposure threshold of a photoresist of a target.

    Abstract translation: 公开了具有局部厚度辅助特征的光掩模和用于制造光掩模的技术。 在示例性实施例中,光掩模包括掩模基板,设置在掩模基板上的反射结构和形成在反射结构上的吸收层。 在掩模上定义打印特征区域和辅助特征区域。 吸收层在印刷特征区域中具有第一厚度,在辅助特征区域中具有与第一厚度不同的第二厚度。 在一些这样的实施例中,第二厚度被配置为使得由辅助特征区域反射的辐射不超过目标的光刻胶的曝光阈值。

    REFLECTIVE MASK AND METHOD OF MAKING SAME
    7.
    发明申请
    REFLECTIVE MASK AND METHOD OF MAKING SAME 有权
    反射掩模及其制作方法

    公开(公告)号:US20150104736A1

    公开(公告)日:2015-04-16

    申请号:US14531639

    申请日:2014-11-03

    CPC classification number: G03F1/24 G03F1/48 H01L21/0337

    Abstract: A reflective mask is described. The mask includes a low thermal expansion material (LTEM) substrate, a conductive layer deposited on a first surface of the LTEM substrate, a stack of reflective multilayers (ML) deposited on a second surface of the LTEM substrate, a capping layer deposited on the stack of reflective ML, a first absorption layer deposited on the first capping layer, a main pattern, and a border ditch. The border ditch reaches to the capping layer, a second absorption layer deposited inside the border ditch, and where the second absorption layer contacts the capping layer. In some instances, the border ditch crosses the capping layer and partially enters the reflective multilayer.

    Abstract translation: 描述了一种反光罩。 掩模包括低热膨胀材料(LTEM)衬底,沉积在LTEM衬底的第一表面上的导电层,沉积在LTEM衬底的第二表面上的反射多层堆叠(ML),沉积在 堆叠的反射ML,沉积在第一盖层上的第一吸收层,主图案和边界沟。 边界沟到达覆盖层,沉积在边界沟内的第二吸收层,第二吸收层与覆盖层接触。 在一些情况下,边界沟穿过覆盖层并部分地进入反射层。

    EUV PHOTO MASKS AND MANUFACTURING METHOD THEREOF

    公开(公告)号:US20240385506A1

    公开(公告)日:2024-11-21

    申请号:US18787278

    申请日:2024-07-29

    Abstract: In a method of manufacturing a reflective mask, a photo resist layer is formed over a mask blank. The mask blank includes a substrate, a reflective multilayer on the substrate, a capping layer on the reflective multilayer, an absorber layer on the capping layer and a hard mask layer, and the absorber layer is made of Cr, CrO or CrON. The photo resist layer is patterned, the hard mask layer is patterned by using the patterned photo resist layer, the absorber layer is patterned by using the patterned hard mask layer, and an additional element is introduced into the patterned absorber layer to form a converted absorber layer.

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