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    • 32. 发明申请
    • CHEMICAL VAPOR DEPOSITION CHAMBER
    • 化学气相沉积室
    • WO1995023428A2
    • 1995-08-31
    • PCT/US1995002138
    • 1995-02-21
    • APPLIED MATERIALS, INC.
    • APPLIED MATERIALS, INC.SINHA, AshokCHANG, MeiPERLOV, IlyaLITTAU, KarlMORRISON, AlanLEI, Lawrence, Chung-Lai
    • H01L21/00
    • C23C16/45521C23C16/4583C23C16/4585
    • A chemical vapor deposition chamber (10) includes a substrate support member (18) positionable therein to receive a substrate (24) thereon for processing. The support member (18) is positioned in the chamber (10) by a moveable stem (20) which extends through a sealed aperture (100) in the base of the chamber (10). To reduce heat transfer from the stem (20) outwardly of the chamber, the stem (20) includes a heat choke portion (44). To ensure that the support member (18) does not droop or sag under the high temperature conditions present in the chamber (10), a secondary plate (91) having high thermal resistance is maintained against the non-substrate receiving side of the support member (18). The use of the secondary plate (91) enables the use of highly thermally conductive, but low thermal strength, materials for the support member (18). The chamber (10) also includes a detection system for detecting the presence of mis-aligned, cracked or warped substrates (24) in the chamber (10). The support member (18) preferably incudes a plurality of vacuum grooves (77, 78) therein, which are maintained at a vacuum pressure to firmly adhere the substrate (24) to the support member (18) during processing. If the vacuum is not maintainable in the grooves (77, 78), this is indicative of a cracked, mis-aligned or warped substrate (77, 78). If this condition occurs, a controller shuts down the chamber and indicates the presence of a cracked, warped or mis-aligned substrate (24). The chamber also provides for edge protection of the substrates (24) as they are processed in the chamber (10). This is provided by creating a purge gas channel (220) about the perimeter of the substrate (24) and aligning the edge of the substrate (24) such that a purge gas gap is provided about the perimeter of the substrate edge.
    • 化学气相沉积室(10)包括可定位在其中的衬底支撑构件(18),用于接收其上的用于处理的衬底(24)。 支撑构件(18)通过可移动的杆(20)定位在腔室(10)中,活动杆延伸穿过腔室(10)的底部中的密封孔(100)。 为了减少从腔室(20)向外的热传递,杆(20)包括热扼流部分(44)。 为了确保支撑构件(18)在室(10)中存在的高温条件下不下垂或下垂,具有高耐热性的次级板(91)保持在支撑构件的非基板接收侧 (18)。 使用二次板(91)使得能够使用高导热但低热强度的材料用于支撑构件(18)。 腔室(10)还包括检测系统,用于检测在腔室(10)中是否存在不对齐的,破裂的或翘曲的基底(24)。 支撑构件(18)优选地在其中包括多个真空槽(77,78),其保持在真空压力下,以在加工期间将基板(24)牢固地附接到支撑构件(18)。 如果凹槽(77,78)中的真空不能维持,则这表示裂纹的,不对准的或翘曲的基底(77,78)。 如果发生这种情况,则控制器关闭室并指示存在破裂,弯曲或不对准衬底(24)。 当腔室(10)被处理时,腔室还提供衬底(24)的边缘保护。 这通过围绕衬底(24)的周边形成吹扫气体通道(220)并对准衬底(24)的边缘来提供,使得围绕衬底边缘的周边设置净化气体间隙。