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    • 51. 发明授权
    • Elimination of etch stop undercut
    • 消除冲击停止
    • US5118382A
    • 1992-06-02
    • US565574
    • 1990-08-10
    • John E. CroninMark N. Lakritz
    • John E. CroninMark N. Lakritz
    • H01L21/306H01L21/311H01L21/768
    • H01L21/76802H01L21/31111H01L21/31144
    • Two methods for wet etch removing an etch stop layer without leaving an undesired undercut are disclosed. In the first method, a reactive ion etch is stopped on an etch stop layer. The exposed etch stop is wet etch removed, leaving an undesirable undercut. The undercut is filled by chemical vapor deposition of a fill material. The filler is then etched to leave a smooth aperture without undercuts. This last etch may be a sputter etch followed by a plasma etch. In the second method, a reactive ion etch is stopped on an etch stop layer as in the first method. Sacrificial sidewalls are then formed within the aperture. The exposed etch stop layer is then removed by wet etching, the positioning of the sidewalls serving to prevent undercutting of the etch stop layer. Finally, the sacrificial sidewalls are etched.
    • 公开了用于湿蚀刻去除蚀刻停止层而不留下不期望的底切的两种方法。 在第一种方法中,在蚀刻停止层上停止反应离子蚀刻。 暴露的蚀刻停止是湿蚀刻去除,留下不希望的底切。 底切被填充材料的化学气相沉积填充。 然后对填料进行蚀刻以留下没有底切的光滑孔。 该最后的蚀刻可以是溅射蚀刻,随后是等离子体蚀刻。 在第二种方法中,如在第一种方法中一样,在蚀刻停止层上停止反应离子蚀刻。 然后在孔内形成牺牲侧壁。 然后通过湿蚀刻去除暴露的蚀刻停止层,侧壁的定位用于防止蚀刻停止层的底切。 最后,蚀刻牺牲侧壁。
    • 54. 发明授权
    • Stacked via in copper/polyimide BEOL
    • 通过铜/聚酰亚胺BEOL堆叠
    • US06590290B1
    • 2003-07-08
    • US09532229
    • 2000-03-22
    • John E. CroninBarbara J. Luther
    • John E. CroninBarbara J. Luther
    • H01L2348
    • H01L21/7681H01L21/76805H01L21/76813H01L21/7684H01L23/5226H01L2924/0002H01L2924/00
    • A structure and method for connecting two levels of interconnect vertically spaced from each other by another level of interconnect by forming a first interconnect region to which contact is to be made, a first insulating layer over the interconnect region, and an etch-stop layer over the first insulating layer, and etching the etch stop layer to form an opening at a position over the first interconnect region. A second interconnect region is formed in contact with the first insulating layer and above the first interconnect region, a second insulating layer is formed over the first insulation layer and the etch stop layer, and an opening is formed in the second insulating layer overlapping the opening in the etch stop layer. The opening in the second insulating layer is extended through the first insulating layer and the openings in the first and second insulating layers are filled with a conductor to create a connection between the first interconnect region and a region above the second insulating layer.
    • 一种结构和方法,用于通过形成要在其上形成接触的第一互连区域,在所述互连区域上方形成第一绝缘层,以及在所述互连区域上方的蚀刻停止层 第一绝缘层,并蚀刻蚀刻停止层,以在第一互连区域上方的位置形成开口。 第二互连区形成为与第一绝缘层接触并且在第一互连区上方形成,第二绝缘层形成在第一绝缘层和蚀刻停止层之上,并且在第二绝缘层中形成与开口重叠的开口 在蚀刻停止层中。 第二绝缘层中的开口延伸穿过第一绝缘层,并且第一和第二绝缘层中的开口填充有导体,以在第一互连区域和第二绝缘层上方的区域之间形成连接。
    • 55. 发明授权
    • Multi-layer hard mask for deep trench silicon etch
    • 用于深沟槽硅蚀刻的多层硬掩模
    • US06440858B1
    • 2002-08-27
    • US09138964
    • 1998-08-24
    • Anthony J. CanaleJohn E. Cronin
    • Anthony J. CanaleJohn E. Cronin
    • H01L21302
    • H01L21/3085H01L21/3065H01L21/3081H01L21/31111H01L27/1087
    • A method of etching multiple films with a dual layer hard mask wherein one layer is totally removed and the other layer partially removed during deep trench etching of the silicon substrate. In particular, a method of deep trench etching silicon substrates comprising the steps of providing a semiconductor substrate capable of being etched, with HBr/NF3/He/O2, having a layer of pad dielectric disposed depositing a layer of material capable of selective removability with respect to the pad dielectric, preferably BSG; depositing a layer of material having a slower etch rate than the semiconductor substrate and the layer of material capable of selective removability with respect to the pad dielectric, preferably, silicon oxide deposited by PECVD; patterning at least one of the layers, and etching the semiconductor substrate to form a trench and removing the layer of material having a slower etch rate than the semiconductor substrate, wherein trenches are of close proximity to each other.
    • 一种用双层硬掩模蚀刻多个膜的方法,其中在硅衬底的深沟槽蚀刻期间完全去除一层,另一层部分去除。 特别地,深沟槽蚀刻硅衬底的方法包括以下步骤:提供能够用HBr / NF 3 / He / O 2蚀刻的半导体衬底,该HBr / NF 3 / He / O 2具有一层衬垫电介质,其设置有沉积能够选择性移除的材料层, 相对于焊盘电介质,优选BSG; 沉积具有比半导体衬底更慢的蚀刻速率的材料层和能够相对于焊盘电介质优选地通过PECVD沉积的氧化硅能够选择性移除的材料层; 图案化至少一个层,并且蚀刻半导体衬底以形成沟槽并去除具有比半导体衬底更低的蚀刻速率的材料层,其中沟槽彼此靠近。
    • 57. 发明授权
    • Method of fabricating a stacked via in copper/polyimide beol
    • 在铜/聚酰亚胺蜂窝中制造堆叠通孔的方法
    • US6143640A
    • 2000-11-07
    • US936090
    • 1997-09-23
    • John E. CroninBarbara J. Luther
    • John E. CroninBarbara J. Luther
    • H05K3/46H01L21/306H01L21/768H01L23/12H01L23/522H01L23/538
    • H01L21/7681H01L21/76805H01L21/76813H01L21/7684H01L23/5226H01L2924/0002
    • A structure and method for connecting two levels of interconnect vertically spaced from each other by another level of interconnect by forming a first interconnect region to which contact is to be made, a first insulating layer over the interconnect region, and an etch-stop layer over the first insulating layer, and etching the etch stop layer to form an opening at a position over the first interconnect region. A second interconnect region is formed in contact with the first insulating layer and above the first interconnect region, a second insulating layer is formed over the first insulation layer and the etch stop layer, and an opening is formed in the second insulating layer overlapping the opening in the etch stop layer. The opening in the second insulating layer is extended through the first insulating layer and the openings in the first and second insulating layers are filled with a conductor to create a connection between the first interconnect region and a region above the second insulating layer.
    • 一种结构和方法,用于通过形成要在其上形成接触的第一互连区域,在所述互连区域上方形成第一绝缘层,以及在所述互连区域上方的蚀刻停止层 第一绝缘层,并蚀刻蚀刻停止层,以在第一互连区域上方的位置形成开口。 第二互连区形成为与第一绝缘层接触并且在第一互连区上方形成,第二绝缘层形成在第一绝缘层和蚀刻停止层之上,并且在第二绝缘层中形成与开口重叠的开口 在蚀刻停止层中。 第二绝缘层中的开口延伸穿过第一绝缘层,并且第一和第二绝缘层中的开口填充有导体,以在第一互连区域和第二绝缘层上方的区域之间形成连接。
    • 60. 发明授权
    • Method of making corrugated vertical stack capacitor (CVSTC)
    • 波纹垂直叠层电容器(CVSTC)制作方法
    • US5556802A
    • 1996-09-17
    • US486630
    • 1995-06-07
    • Paul E. Bakeman, Jr.Bomy A. ChenJohn E. CroninSteven J. HolmesHing Wong
    • Paul E. Bakeman, Jr.Bomy A. ChenJohn E. CroninSteven J. HolmesHing Wong
    • H01L21/02H01L21/8242H01L27/108
    • H01L27/10852H01L27/10817H01L28/82H01L28/84H01L28/90Y10S438/949
    • A method for forming a capacitor on a substrate having a contact below a top layer including the steps of:Spinning on a layer of photoresist material. Exposing the photoresist to light to establish a standing wave pattern to fix prominences of photoresist separated by separation areas. Each prominence extends a prominence height from the top layer to a top. Developing the photoresist to fix an erose face on each prominence, each face extending from the top layer to the top. Depositing a first oxide intermediate prominences to effect accumulation of the first oxide to an oxide height at least equal to the prominence height. Etching the first oxide to expose each top. Dissolving the photoresist to uncover oxide mandrels. Each mandrel extends a mandrel height from the top layer to a mandrel top; each mandrel has an erose mandrel face intermediate the top layer and the mandrel top. Etching the top layer to expose the contact. Depositing a first silicon material over selected mandrels, the top layer, and the contact intermediate the selected mandrels. Depositing photoresist over the first silicon. Etching the photoresist and the first silicon to the mandrel height to establish a node capacitor electrode. Stripping the photoresist remaining. Stripping the first oxide. Depositing a second oxide over the node electrode to establish a capacitor dielectric layer. Depositing a second silicon material over the dielectric layer to establish a plate capacitor electrode.
    • 一种在具有在顶层之下具有接触的基底上形成电容器的方法,包括以下步骤:在光致抗蚀剂材料层上旋转。 将光致抗蚀剂曝光以建立驻波图案以固定由分离区域分离的光致抗蚀剂的突出部分。 每个突出部分从顶层延伸到顶部。 显影光致抗蚀剂以在每个突起处固定一个正面,每个面从顶层延伸到顶部。 沉积第一氧化物中间体以使第一氧化物积累至至少等于突出高度的氧化物高度。 蚀刻第一氧化物以暴露每个顶部。 溶解光致抗蚀剂以露出氧化物心轴。 每个心轴将心轴高度从顶层延伸到心轴顶部; 每个心轴具有在顶层和心轴顶部之间的中心轴。 蚀刻顶层以暴露接触。 将第一硅材料沉积在选定的心轴,顶层和选定的心轴之间的接触之上。 在第一硅上沉积光致抗蚀剂。 将光致抗蚀剂和第一硅蚀刻到心轴高度以建立节点电容器电极。 剥离残留的光致抗蚀剂。 剥去第一氧化物。 在节点电极上沉积第二氧化物以建立电容器介电层。 在电介质层上沉积第二硅材料以建立平板电容器电极。