CN111892404A - 一种耐腐蚀碳化硅扩散管及其制备方法 - Google Patents

一种耐腐蚀碳化硅扩散管及其制备方法 Download PDF

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CN111892404A
CN111892404A CN202010765289.1A CN202010765289A CN111892404A CN 111892404 A CN111892404 A CN 111892404A CN 202010765289 A CN202010765289 A CN 202010765289A CN 111892404 A CN111892404 A CN 111892404A
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魏东
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Fct Tangshan New Materials Co ltd
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Abstract

本发明涉及扩散炉管的技术领域,特别是涉及一种耐腐蚀碳化硅扩散管及其制备方法,提高耐压强度,并且提高耐腐蚀性,延长使用周期;包括以下步骤:S1、将碳化硅95‑98wt%、氧化铝0.3‑0.6wt%、氧化铁0.2‑0.5wt%、四氯化钛0.1‑0.3wt%、氧化镱0.1‑0.3wt%和氮化硼1‑4wt%混合均匀,加入水分进行搅拌,搅拌成具有流动性的泥浆;S2、将S1中泥浆注入扩散管石膏模具中,脱水干燥过程中同时形成一定强度的坯体;S3、将S2中坯体在真空或者惰性保护气氛条件下用碳管炉进行烧结,烧结温度2400‑2500摄氏度,形成半成品A;S4、将半成品A进行阶段性冷却,然后取出,然后对半成品A内壁进行抛光打磨,形成半成品B;S5、将半成品B放至沉积炉中,降温取出后形成耐腐蚀碳化硅扩散管。

Description

一种耐腐蚀碳化硅扩散管及其制备方法
技术领域
本发明涉及扩散炉管的技术领域,特别是涉及一种耐腐蚀碳化硅 扩散管及其制备方法。
背景技术
众所周知,扩散炉管是半导体器件及大规模集成电路制造过程中 用于对硅片进行扩散、氧化、退火、合金及烧结等工艺的一种加工装 置,在高温下用氮气携带三氯氧磷气体进入扩散管中,与氧气发生反 应,生成五氧化二磷,生成的五氧化二磷与制绒后的硅片反应,生成 磷原子,磷原子在高温下扩散到硅片体内,形成PN结。主要反应装 置一般分为水平式和直立式两种,半导体材料在高纯净的反应腔内进 行高温反应,此过程一般需要通入不同种类的气体或对腔体进行抽真 空处理。
但是现有的碳化硅扩散管存在耐腐蚀性差的问题,并且当出现被 腐蚀的情况,其不便于进行维修,实用性较差;并且且强度低,容易 在使用中出现破损损坏,使用可靠性较低。
发明内容
为解决上述技术问题,本发明的一个目的在于提供一种耐腐蚀碳 化硅扩散管,提高耐压强度,并且提高耐腐蚀性,延长使用周期。
本发明的另一个目的在于提供一种耐腐蚀碳化硅扩散管的制备 方法。
本发明的一种耐腐蚀碳化硅扩散管的制备方法,包括以下步骤:
S1、将碳化硅95-98wt%、氧化铝0.3-0.6wt%、氧化铁0.2-0.5wt%、 四氯化钛0.1-0.3wt%、氧化镱0.1-0.3wt%和氮化硼1-4wt%混合均匀, 加入水分进行搅拌,搅拌成具有流动性的泥浆;
S2、将S1中泥浆注入扩散管石膏模具中,脱水干燥过程中同时 形成一定强度的坯体;
S3、将S2中坯体在真空或者惰性保护气氛条件下用碳管炉进行 烧结,烧结温度2400-2500摄氏度,形成半成品A;
S4、将半成品A进行阶段性冷却,然后取出,然后对半成品A内 壁进行抛光打磨,形成半成品B;
S5、将半成品B放至沉积炉中,抽真空至压力<300Pa,升温至 1000~1100℃,通入氩气、氢气和一甲基三氯硅烷,一甲基三氯硅烷 发生化学反应生成碳化硅基体,保温80~160h,在半成品B表面生 成厚度约0.05~0.1mm的均匀致密的碳化硅涂层,降温取出后形成耐 腐蚀碳化硅扩散管。
本发明的一种耐腐蚀碳化硅扩散管的制备方法,步骤S1中碳化 硅95.5-98wt%、氧化铝0.3-0.6wt%、氧化铁0.2-0.5wt%、四氯化钛 0.2-0.3wt%、氧化镱0.2-0.3wt%和氮化硼1-3.7wt%。
本发明的一种耐腐蚀碳化硅扩散管的制备方法,步骤S1中碳化 硅95.5-97.8wt%、氧化铝0.3-0.6wt%、氧化铁0.2-0.45wt%、四氯 化钛0.2-0.3wt%、氧化镱0.2-0.3wt%和氮化硼1-3.7wt%。
本发明的一种耐腐蚀碳化硅扩散管的制备方法,所述步骤S3中 烧结时间为80-100h,并且碳管炉采用阶段性升温,然后恒温的方式。
本发明的一种耐腐蚀碳化硅扩散管的制备方法,所述步骤S4中 采用手持磨石方式打磨,磨石粒度为10000-12000目。
本发明的一种耐腐蚀碳化硅扩散管的制备方法,所述步骤S5中 氩气流量为4.2-5.1L/min;氢气流量为5.3-6.1L/min;氢气与一甲 基三氯硅烷的摩尔质量比为10:1。
本发明的一种耐腐蚀碳化硅扩散管的制备方法,所述步骤S1中 水为去离子水。
本发明的一种耐腐蚀碳化硅扩散管,由所述的耐腐蚀碳化硅扩散 管的制备方法制得。
与现有技术相比本发明的有益效果为:在同时添加四氯化钛、氧 化镱以及氮化硼的情况下,使得扩散管的耐压强度大幅度提升;附着 碳化硅涂层,使其相对于市面购买石英玻璃扩散管未附着碳化硅涂层 来说,其使用周期大幅提升,并且当碳化硅涂层损坏时,只需重新对 涂层进行修复即可;并且具有良好的光学均匀性。
具体实施方式
下面结合实施例,对本发明的具体实施方式作进一步详细描述。 以下实施例用于说明本发明,但不用来限制本发明的范围。
实施例1:
一种耐腐蚀碳化硅扩散管,其制备方法包括以下步骤:
S1、将碳化硅95wt%、氧化铝0.6wt%、氧化铁0.5wt%、四氯化 钛0.3wt%、氧化镱0.1wt%和氮化硼3.5wt%混合均匀,加入去离子水 进行搅拌,搅拌成具有流动性的泥浆;
S2、将S1中泥浆注入扩散管石膏模具中,脱水干燥过程中同时 形成一定强度的坯体;
S3、将S2中坯体在真空或者惰性保护气氛条件下用碳管炉进行 烧结,烧结温度2400-2500摄氏度,烧结时间为80h,形成半成品A;
S4、将半成品A进行阶段性冷却,然后取出,然后对半成品A内 壁进行抛光打磨,采用手持磨石方式打磨,磨石粒度为10000-12000 目,形成半成品B;
S5、将半成品B放至沉积炉中,抽真空至压力<300Pa,升温至 1000~1100℃,通入氩气、氢气和一甲基三氯硅烷,一甲基三氯硅烷 发生化学反应生成碳化硅基体,保温80~160h,在半成品B表面生 成厚度约0.05~0.1mm的均匀致密的碳化硅涂层,降温取出后形成耐 腐蚀碳化硅扩散管,其中氩气流量为4.2-5.1L/min;氢气流量为5.3-6.1L/min;氢气与一甲基三氯硅烷的摩尔质量比为10:1。
实施例2:
一种耐腐蚀碳化硅扩散管,其制备方法包括以下步骤:
S1、将碳化硅98wt%、氧化铝0.3wt%、氧化铁0.2wt%、四氯化 钛0.1wt%、氧化镱0.3wt%和氮化硼1.1wt%混合均匀,加入去离子水 进行搅拌,搅拌成具有流动性的泥浆;
S2、将S1中泥浆注入扩散管石膏模具中,脱水干燥过程中同时 形成一定强度的坯体;
S3、将S2中坯体在真空或者惰性保护气氛条件下用碳管炉进行 烧结,烧结温度2400-2500摄氏度,烧结时间为100h,形成半成品A;
S4、将半成品A进行阶段性冷却,然后取出,然后对半成品A内 壁进行抛光打磨,采用手持磨石方式打磨,磨石粒度为10000-12000 目,形成半成品B;
S5、将半成品B放至沉积炉中,抽真空至压力<300Pa,升温至 1000~1100℃,通入氩气、氢气和一甲基三氯硅烷,一甲基三氯硅烷 发生化学反应生成碳化硅基体,保温80~160h,在半成品B表面生 成厚度约0.05~0.1mm的均匀致密的碳化硅涂层,降温取出后形成耐 腐蚀碳化硅扩散管,其中氩气流量为4.2-5.1L/min;氢气流量为 5.3-6.1L/min;氢气与一甲基三氯硅烷的摩尔质量比为10:1。
实施例3:
S1、将碳化硅95.5wt%、氧化铝0.4wt%、氧化铁0.4wt%、四氯 化钛0.3wt%、氧化镱0.2wt%和氮化硼3.2wt%混合均匀,加入去离子 水进行搅拌,搅拌成具有流动性的泥浆;
S2、将S1中泥浆注入扩散管石膏模具中,脱水干燥过程中同时 形成一定强度的坯体;
S3、将S2中坯体在真空或者惰性保护气氛条件下用碳管炉进行 烧结,烧结温度2400-2500摄氏度,烧结时间为90h,形成半成品A;
S4、将半成品A进行阶段性冷却,然后取出,然后对半成品A内 壁进行抛光打磨,采用手持磨石方式打磨,磨石粒度为10000-12000 目,形成半成品B;
S5、将半成品B放至沉积炉中,抽真空至压力<300Pa,升温至 1000~1100℃,通入氩气、氢气和一甲基三氯硅烷,一甲基三氯硅烷 发生化学反应生成碳化硅基体,保温80~160h,在半成品B表面生 成厚度约0.05~0.1mm的均匀致密的碳化硅涂层,降温取出后形成耐 腐蚀碳化硅扩散管,其中氩气流量为4.2-5.1L/min;氢气流量为 5.3-6.1L/min;氢气与一甲基三氯硅烷的摩尔质量比为10:1。
实施例4:
S1、将碳化硅97.8wt%、氧化铝0.2wt%、氧化铁0.45wt%、四氯 化钛0.3wt%、氧化镱0.2wt%和氮化硼1.05wt%混合均匀,加入去离 子水进行搅拌,搅拌成具有流动性的泥浆;
S2、将S1中泥浆注入扩散管石膏模具中,脱水干燥过程中同时 形成一定强度的坯体;
S3、将S2中坯体在真空或者惰性保护气氛条件下用碳管炉进行 烧结,烧结温度2400-2500摄氏度,烧结时间为90h,形成半成品A;
S4、将半成品A进行阶段性冷却,然后取出,然后对半成品A内 壁进行抛光打磨,采用手持磨石方式打磨,磨石粒度为10000-12000 目,形成半成品B;
S5、将半成品B放至沉积炉中,抽真空至压力<300Pa,升温至 1000~1100℃,通入氩气、氢气和一甲基三氯硅烷,一甲基三氯硅烷 发生化学反应生成碳化硅基体,保温80~160h,在半成品B表面生 成厚度约0.05~0.1mm的均匀致密的碳化硅涂层,降温取出后形成耐 腐蚀碳化硅扩散管,其中氩气流量为4.2-5.1L/min;氢气流量为 5.3-6.1L/min;氢气与一甲基三氯硅烷的摩尔质量比为10:1。
实施例5:
S1、将碳化硅96.3wt%、氧化铝0.4wt%、氧化铁0.35wt%、四氯 化钛0.25wt%、氧化镱0.25wt%和氮化硼2.45wt%混合均匀,加入去 离子水进行搅拌,搅拌成具有流动性的泥浆;
S2、将S1中泥浆注入扩散管石膏模具中,脱水干燥过程中同时 形成一定强度的坯体;
S3、将S2中坯体在真空或者惰性保护气氛条件下用碳管炉进行 烧结,烧结温度2400-2500摄氏度,烧结时间为90h,形成半成品A;
S4、将半成品A进行阶段性冷却,然后取出,然后对半成品A内 壁进行抛光打磨,采用手持磨石方式打磨,磨石粒度为10000-12000 目,形成半成品B;
S5、将半成品B放至沉积炉中,抽真空至压力<300Pa,升温至 1000~1100℃,通入氩气、氢气和一甲基三氯硅烷,一甲基三氯硅烷 发生化学反应生成碳化硅基体,保温80~160h,在半成品B表面生 成厚度约0.05~0.1mm的均匀致密的碳化硅涂层,降温取出后形成耐 腐蚀碳化硅扩散管,其中氩气流量为4.2-5.1L/min;氢气流量为 5.3-6.1L/min;氢气与一甲基三氯硅烷的摩尔质量比为10:1。
对比例1:
与实施例5相比区别在于:将氧化铝0.4wt%去除,将碳化硅 96.3wt%增加至96.7wt%。
对比例2:
与实施例5相比区别在于:将四氯化钛0.25wt%去除,将碳化硅 96.3wt%增加至96.55wt%。
对比例3:
与实施例5相比区别在于:将氧化镱0.25wt%去除,将碳化硅 96.3wt%增加至96.55wt%。
对比例4:
与实施例5相比区别在于:将氮化硼2.45wt%去除,将碳化硅96.3wt%增加至98.75wt%。
对比例5:
与实施例5相比区别在于:将氧化铁0.35wt%去除,将碳化硅 96.3wt%增加至96.65wt%。
由上述实施例1-5以及对比例1-5制取的扩散管以及市面购买的 石英玻璃扩散管进行测试,得到如下数据:
耐压强度(Mpa) 使用周期(h) 光学均匀性
实施例1 2200 500
实施例2 2215 503
实施例3 2230 504
实施例4 2245 512
实施例5 2260 531
对比例1 2255 526
对比例2 2103 531
对比例3 2106 526
对比例4 2090 527
对比例5 2250 525
市面购买 2000 450
由上述数据可知,去除氧化铝以及氧化铁耐压强度均未出现较大 波动,由此可见,在同时添加四氯化钛、氧化镱以及氮化硼的情况下, 使得扩散管的耐压强度大幅度提升;由上述数据得知,实施例1-5以 及对比例1-5均附着碳化硅涂层,使其相对于市面购买石英玻璃扩散 管未附着碳化硅涂层来说,其使用周期大幅提升;并且具有良好的光 学均匀性。
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,在不脱离本发明技术原理的前提下,还可以 做出若干改进和变型,这些改进和变型也应视为本发明的保护范围。

Claims (8)

1.一种耐腐蚀碳化硅扩散管的制备方法,其特征在于,包括以下步骤:
S1、将碳化硅95-98wt%、氧化铝0.3-0.6wt%、氧化铁0.2-0.5wt%、四氯化钛0.1-0.3wt%、氧化镱0.1-0.3wt%和氮化硼1-4wt%混合均匀,加入水分进行搅拌,搅拌成具有流动性的泥浆;
S2、将S1中泥浆注入扩散管石膏模具中,脱水干燥过程中同时形成一定强度的坯体;
S3、将S2中坯体在真空或者惰性保护气氛条件下用碳管炉进行烧结,烧结温度2400-2500摄氏度,形成半成品A;
S4、将半成品A进行阶段性冷却,然后取出,然后对半成品A内壁进行抛光打磨,形成半成品B;
S5、将半成品B放至沉积炉中,抽真空至压力<300Pa,升温至1000~1100℃,通入氩气、氢气和一甲基三氯硅烷,一甲基三氯硅烷发生化学反应生成碳化硅基体,保温80~160h,在半成品B表面生成厚度约0.05~0.1mm的均匀致密的碳化硅涂层,降温取出后形成耐腐蚀碳化硅扩散管。
2.如权利要求1所述的一种耐腐蚀碳化硅扩散管的制备方法,其特征在于,步骤S1中碳化硅95.5-98wt%、氧化铝0.3-0.6wt%、氧化铁0.2-0.5wt%、四氯化钛0.2-0.3wt%、氧化镱0.2-0.3wt%和氮化硼1-3.7wt%。
3.如权利要求2所述的一种耐腐蚀碳化硅扩散管的制备方法,其特征在于,步骤S1中碳化硅95.5-97.8wt%、氧化铝0.3-0.6wt%、氧化铁0.2-0.45wt%、四氯化钛0.2-0.3wt%、氧化镱0.2-0.3wt%和氮化硼1-3.7wt%。
4.如权利要求3所述的一种耐腐蚀碳化硅扩散管的制备方法,其特征在于,所述步骤S3中烧结时间为80-100h,并且碳管炉采用阶段性升温,然后恒温的方式。
5.如权利要求4所述的一种耐腐蚀碳化硅扩散管的制备方法,其特征在于,所述步骤S4中采用手持磨石方式打磨,磨石粒度为10000-12000目。
6.如权利要求5所述的一种耐腐蚀碳化硅扩散管的制备方法,其特征在于,所述步骤S5中氩气流量为4.2-5.1L/min;氢气流量为5.3-6.1L/min;氢气与一甲基三氯硅烷的摩尔质量比为10:1。
7.如权利要求6所述的一种耐腐蚀碳化硅扩散管的制备方法,其特征在于,所述步骤S1中水为去离子水。
8.一种耐腐蚀碳化硅扩散管,由权利要求1-7所述的耐腐蚀碳化硅扩散管的制备方法制得。
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