CN113759664A - 一种适用于半导体分立器件的光刻方法 - Google Patents
一种适用于半导体分立器件的光刻方法 Download PDFInfo
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
- G03F7/2004—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image characterised by the use of a particular light source, e.g. fluorescent lamps or deep UV light
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/38—Treatment before imagewise removal, e.g. prebaking
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Abstract
本发明公开了一种适用于半导体分立器件的光刻方法,改变光刻步骤中的旋转涂胶、前烘温度、曝光时间、显影时间等四个主要光刻工艺参数:匀胶时匀胶机低速旋转速度为500r/min,时间为10s,高速旋转速度为4000r/min,时间为25s;前烘温度为120℃,持续时长为3min;曝光时间为20s;显影时间为30s。基于上述参数,通过URE‑2000/17型紫外光刻机进行实验,能够成功地将掩模版上呈现的图案精确复制到硅片基底上,显影后光刻胶线条清晰,图形完整。
Description
技术领域
本发明涉及一种适用于半导体分立器件的光刻方法。
背景技术
光刻是集成电路制造的核心工艺,光刻机是光刻工艺是最主要设备。目前光刻工艺主要采用紫外光刻和粒子束光刻两种方法,紫外光刻占据主导地位。按曝光方式,光刻可分为接触接近式光刻和投影式光刻。在光刻技术中,接触/接近式光刻发展最早,也是最常见的曝光方式,它采用1:1方式复印掩膜版上的图形。
对于中国科学院光电技术研究所的URE-2000/17型紫外光刻机,中国科学院微电子研究所KW-4A型台式匀胶机,北京赛德凯斯电子有限责任公司制造的烘烤设备SC-H-II型烤胶机等国产设备来说,旋转涂胶、前烘、曝光、显影四个主要光刻工艺的参数范围较大,不能精准的将掩模版图形转移到硅片基底上。
发明内容
发明目的:针对上述现有技术,提出一种适用于半导体分立器件的光刻方法,能够将掩模版图形成功地转移到硅片基底上,显影后光刻胶线条清晰,图形完整。
技术方案:一种适用于半导体分立器件的光刻方法,包括如下步骤:
步骤一:提供进行光刻所需要尺寸大小的硅片;
步骤二:对硅片表面依次进行清洁、烘干、采用六甲基二硅胺烷进行气相成底膜处理;
步骤三:通过旋转涂胶的方法在硅片表面涂布光刻胶;旋转涂胶时,将硅片置于匀胶机上,匀胶机低速旋转速度为500r/min,时间为10s,高速旋转速度为4000r/min,时间为25s;
步骤四:对光刻胶进行前烘,前烘温度为120℃,持续时长为3min;
步骤五:将硅片置于光刻机下进行对准和曝光,曝光时长为20s;
步骤六:将曝光后的硅片放入显影液中显影,显影时长为30s;
步骤七:将硅片再次放到烤胶机上进行坚膜烘培;
步骤八:最后进行显影检查。
有益效果:本发明对旋转涂胶、前烘温度、曝光时间和显影时间等关键因素进行了探索,通过URE-2000/17型紫外光刻机进行光刻工艺实验,深入研究光刻工艺,获得了最佳的工艺参数:匀胶时匀胶机低速旋转速度为500r/min,时间为10s,高速旋转速度为4000r/min,时间为25s;前烘温度为120℃,持续时长为3min;曝光时间为20s,显影时间为30s。基于上述参数,能够成功地将掩模版上呈现的图案精确复制到硅片基底上,为后续工艺奠定了良好基础。
附图说明
图1为本发明方法流程图。
具体实施方式
下面结合附图对本发明做更进一步的解释。
如图1所示,一种适用于半导体分立器件的光刻方法,包括如下步骤:
步骤一:提供进行光刻所需要尺寸大小的硅片;
步骤二:对硅片表面依次进行清洁、烘干、采用六甲基二硅胺烷进行气相成底膜处理;
步骤三:通过旋转涂胶的方法在硅片表面涂布光刻胶;旋转涂胶时,将硅片置于匀胶机上,匀胶机低速旋转速度为500r/min,时间为10s,高速旋转速度为4000r/min,时间为25s;
步骤四:对光刻胶进行前烘,前烘温度为120℃,持续时长为3min;
步骤五:将硅片置于光刻机下进行对准和曝光,曝光时长为20s;
步骤六:将曝光后的硅片放入显影液中显影,显影时长为30s;
步骤七:将硅片再次放到烤胶机上进行坚膜烘培;
步骤八:最后进行显影检查。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (1)
1.一种适用于半导体分立器件的光刻方法,其特征在于,包括如下步骤:
步骤一:提供进行光刻所需要尺寸大小的硅片;
步骤二:对硅片表面依次进行清洁、烘干、采用六甲基二硅胺烷进行气相成底膜处理;
步骤三:通过旋转涂胶的方法在硅片表面涂布光刻胶;旋转涂胶时,将硅片置于匀胶机上,匀胶机低速旋转速度为500r/min,时间为10s,高速旋转速度为4000r/min,时间为25s;
步骤四:对光刻胶进行前烘,前烘温度为120℃,持续时长为3min;
步骤五:将硅片置于光刻机下进行对准和曝光,曝光时长为20s;
步骤六:将曝光后的硅片放入显影液中显影,显影时长为30s;
步骤七:将硅片再次放到烤胶机上进行坚膜烘培;
步骤八:最后进行显影检查。
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