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    • 14. 发明公开
    • Damascene wiring structure and semiconductor device with damascene wirings
    • 大马士革Verdrahtung Struktur und Halbleiterement mit大马士革Verdrahtungen
    • EP1146558A3
    • 2003-11-05
    • EP01300116.9
    • 2001-01-08
    • FUJITSU LIMITED
    • Otsuka, SatoshiYamanoue, Akira
    • H01L23/532H01L23/522H01L21/768H01L23/528
    • H01L21/76816H01L21/76807H01L23/5226H01L23/53228H01L2924/0002H01L2924/00
    • A damascene wiring structure having: a lower wiring structure (5); an interlayer insulating film (7) covering the lower wiring structure (5); a wiring trench (G2) formed in the interlayer insulating film (7) from an upper surface thereof, and a via hole (VIA) passing through the interlayer insulating film (7) from a lower surface of the wiring trench (G2) in an inner area thereof and reaching the lower wiring structure (5), the via hole (VIA) having a diameter smaller than a width of the wiring trench (G2); an insulating pillar pattern (RI) projecting upward from the lower surface of the wiring trench (G2) in an area outside of the via hole (VIA), the insulating pillar pattern (RI) being made of a same material as the interlayer insulating film (7), wherein a first occupied area factor of the insulating pillar pattern (RI) in a first area of the wiring trench (G2) near said via hole (VIA) is higher than a second occupied area factor of the insulating pillar pattern (RI) in a second area of the wiring trench (G2) remote from the via hole (VIA); and a dual damascene wiring (10) formed by filling the wiring trench (G2) and said via hole (G2) with conductive material. A damascene wiring structure (10) having a high reliability and a semiconductor device having such a damascene wiring structure can be formed.
    • 一种镶嵌式布线结构,具有:下部布线结构(5); 覆盖下部布线结构(5)的层间绝缘膜(7); 从上表面形成在层间绝缘膜(7)中的布线沟槽(G2)和从布线沟槽(G2)的下表面穿过层间绝缘膜(7)的通孔(VIA) 其内部区域到达下部布线结构(5),所述通孔(VIA)的直径小于所述布线沟槽(G2)的宽度; 绝缘柱图案(RI),其从所述布线沟槽(G2)的下表面向上突出在所述通孔(VIA)外的区域中,所述绝缘柱图案(RI)由与所述层间绝缘膜相同的材料制成 (7),其中在所述通孔(VIA)附近的布线沟槽(G2)的第一区域中的绝缘柱图案(RI)的第一占有面积因子高于绝缘柱图案的第二占据面积因子 RI),远离通孔(VIA)的布线沟槽(G2)的第二区域中; 以及通过用导电材料填充所述布线沟槽(G2)和所述通孔(G2)而形成的双镶嵌布线(10)。 可以形成具有高可靠性的镶嵌布线结构(10)和具有这种镶嵌布线结构的半导体器件。