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    • 8. 发明授权
    • Method for planarizing an integrated circuit structure using low melting
inorganic material
    • 使用低熔点无机材料平面化集成电路结构的方法
    • US5204288A
    • 1993-04-20
    • US845544
    • 1992-03-04
    • Jeffrey MarksKam S. LawDavid N. WangDan Maydan
    • Jeffrey MarksKam S. LawDavid N. WangDan Maydan
    • H01L21/3105H01L21/316H01L21/768H01L23/31
    • H01L21/3105H01L21/31055H01L21/31604H01L21/76819H01L23/3157H01L2924/0002Y10S148/133Y10S438/913
    • A planarizing process for planarizing an integrated circuit structure in a CVD apparatus is disclosed using a low melting inorganic planarizing material which comprises flowing white depositing a low melting inorganic planarizing layer such as a boron oxide glass over a layer of insulating material such as an oxide of silicon, then dry etching the low melting inorganic planarizing layer to planarize the structure, and then depositing a further layer of an insulating material to encapsulate any remaining portions of the low melting glass planarizing layer which may be hygroscopic. The method eliminates the need for separate coating, drying, and curing steps associated with the application of organic-based planarizing layers usually carried out outside of a vacuum apparatus. In a preferred embodiment, the deposition steps and the etching step are all carried out without removing the integrated circuit structure from the apparatus. In a particularly preferred embodiment, all of the steps are carried out in the same chamber of the apparatus. An additional etching step may be carried out after depositing the first insulating layer and prior to deposition of the planarizing layer to remove any voids formed in the insulating layer.
    • 公开了使用低熔点无机平面化材料来平坦化CVD装置中的集成电路结构的平面化工艺,该无机平面化材料包括使诸如氧化硼玻璃之类的低熔点无机平面化层在诸如氧化物 硅,然后干法蚀刻低熔点无机平面化层以使结构平坦化,然后沉积另外的绝缘材料层以封装可能是吸湿性的低熔点玻璃平坦化层的任何剩余部分。 该方法消除了对通常在真空装置外进行的有机基平坦化层的应用的独立涂布,干燥和固化步骤的需要。 在优选实施例中,沉积步骤和蚀刻步骤全部进行而不从集成电路结构从设备中移除。 在特别优选的实施例中,所有步骤在装置的相同腔室中进行。 在沉积第一绝缘层之后并且在沉积平坦化层以去除在绝缘层中形成的任何空隙之前,可以进行另外的蚀刻步骤。