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    • 4. 发明授权
    • Method for manufacturing semiconductor device
    • 制造半导体器件的方法
    • US06998325B2
    • 2006-02-14
    • US10980279
    • 2004-11-04
    • Takashi YunogamiKaori Misawa
    • Takashi YunogamiKaori Misawa
    • H01L21/76
    • H01L21/02126H01L21/02203H01L21/02282H01L21/02337H01L21/02362H01L21/31695H01L21/76802H01L21/7682H01L21/76828H01L2221/1047
    • An insulating-film composition containing an insulating-film precursor and a pore-generating material is applied onto a surface of a semiconductor substrate, and a first heat treatment is performed to polymerize the insulating-film precursor without vaporizing the pore-generating material, to form a non-porous insulating film. Next, a resist pattern is formed on the non-porous insulating film, and dry etching is performed, using the resist pattern as a mask, to form a trench in the non-porous insulating film. After removing the resist pattern by ashing, the surface of the semiconductor substrate is cleaned. Next, a second heat treatment is performed to remove the pore-generating material from the non-porous insulating film and to form a porous insulating film. Thereafter, a copper layer is deposited in the trench on a barrier-metal film to form copper wiring.
    • 将包含绝缘膜前体和孔产生材料的绝缘膜组合物施加到半导体衬底的表面上,并且进行第一热处理以使绝缘膜前体聚合而不使气孔产生材料蒸发, 形成无孔绝缘膜。 接下来,在无孔绝缘膜上形成抗蚀剂图案,并使用抗蚀剂图案作为掩模进行干法蚀刻,以在无孔绝缘膜中形成沟槽。 通过灰化除去抗蚀剂图案后,清洁半导体衬底的表面。 接下来,进行第二热处理以从无孔绝缘膜去除发孔材料并形成多孔绝缘膜。 此后,在阻挡金属膜上的沟槽中沉积铜层以形成铜布线。