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    • 5. 发明授权
    • Silicon carbide MOSFET having self-aligned gate structure and method of
fabrication
    • 具有自对准栅极结构的碳化硅MOSFET和制造方法
    • US5963791A
    • 1999-10-05
    • US900442
    • 1997-07-25
    • Dale Marius BrownRichard Joseph SaiaJohn Adam EdmondJohn Williams Palmour
    • Dale Marius BrownRichard Joseph SaiaJohn Adam EdmondJohn Williams Palmour
    • H01L21/04H01L29/24H01L29/423H01L21/00
    • H01L29/1608H01L29/66068H01L29/78Y10S438/931
    • A SiC MOSFET having a self-aligned gate structure is fabricated upon a monocrystalline substrate layer, such as a p type conductivity .alpha.6H silicon carbide (SiC) substrate. An SiC n+ type conductivity layer is epitaxially grown on the substrate layer. A steep-walled groove is etched through the n+ SiC layer and partially into the p SiC layer at a location on the substrate where a MOSFET gate structure is desired. Subsequently, a thin layer of silicon dioxide and a layer of gate metal are successively deposited over the entire structure. The gate metal layer is deposited with sufficient thickness to substantially fill the groove. A layer of photoresist is applied to the entire surface of the gate metal layer. The photoresist and the underlying gate metal are then reactive ion etched down to the oxide layer, leaving gate metal remaining only in the groove. The gate metal and oxide layer form the self-aligned gate structure wherein the walls of the groove are automatically aligned with the edges of drain and source regions that are formed on either side of the groove.
    • 具有自对准栅极结构的SiC MOSFET在单晶衬底层(例如p型导电性α6H碳化硅(SiC))衬底上制造。 在衬底层上外延生长SiC n +型导电层。 通过n + SiC层蚀刻陡壁凹槽,并且在需要MOSFET栅极结构的衬底上的位置处部分地蚀刻到p SiC层中。 随后,在整个结构上依次沉积二氧化硅薄层和栅极金属层。 栅极金属层被沉积​​有足够的厚度以基本上填充凹槽。 将光致抗蚀剂层施加到栅极金属层的整个表面。 然后将光致抗蚀剂和下面的栅极金属反应离子蚀刻到氧化物层,留下栅极金属仅在沟槽中。 栅极金属和氧化物层形成自对准栅极结构,其中沟槽的壁自动地与形成在槽的任一侧上的漏极和源极区域的边缘对准。
    • 6. 发明授权
    • Fabrication method for thin film capacitors
    • 薄膜电容器的制造方法
    • US5736448A
    • 1998-04-07
    • US566616
    • 1995-12-04
    • Richard Joseph SaiaKevin Matthew DurocherBernard Gorowitz
    • Richard Joseph SaiaKevin Matthew DurocherBernard Gorowitz
    • H01G4/33H01L23/498H01L23/538H01L27/01H01L21/20
    • H01L23/5383H01L23/49894H01L27/016H01L2924/0002
    • A capacitor is fabricated on a base surface by applying a first pattern of electrical conductors (a first capacitor plate) over the base surface with an outer surface of the first pattern of electrical conductors including molybdenum. A first hard portion of a capacitor dielectric layer including amorphous hydrogenated carbon is deposited over the first capacitor plate and the base surface, a soft portion of the capacitor dielectric layer is deposited over the first hard portion, and a second hard portion of the capacitor dielectric layer is deposited over the soft portion. The deposition of the soft portion occurs at a lower bias voltage than the deposition of the first and second hard portions. A second pattern of electrical conductors (a second capacitor plate) is applied over the capacitor dielectric layer which is then patterned. A polymer layer is applied over the first and second capacitor plates, and two vias are formed, a first via extending to the first capacitor plate and a second via extending to the second capacitor plate. An electrode-coupling pattern of electrical conductors is applied over the polymer layer, a first portion extending into the first via and a second portion extending into the second via. Deposition of the capacitor dielectric layer can include using a methylethylketone precursor. Additional capacitor dielectric layers and plates having staggered via landing pads can be layered to increase the capacitance.
    • 通过在基底表面上施加电导体(第一电容器板)的第一图案,使第一电导体图案包括钼的外表面,在基底表面上制造电容器。 包括无定形氢化碳的电容器电介质层的第一硬部分沉积在第一电容器板和基底表面上,电容器电介质层的软部分沉积在第一硬部分上,电容器电介质的第二硬部分 层沉积在软部分上。 软部分的沉积在比第一和第二硬部分的沉积更低的偏压下发生。 将电导体(第二电容器板)的第二图案施加在电容器电介质层上,然后将其图案化。 将聚合物层施加在第一和第二电容器板上,形成两个通孔,延伸到第一电容器板的第一通孔和延伸到第二电容器板的第二通孔。 电导体的电极耦合图案施加在聚合物层上,第一部分延伸到第一通孔中,第二部分延伸到第二通孔中。 电容器介电层的沉积可以包括使用甲基乙基酮前体。 具有交错通孔接地焊盘的附加电容器电介质层和板可以被层叠以增加电容。
    • 7. 发明授权
    • Silicon carbide MOSFET having self-aligned gate structure
    • 具有自对准栅极结构的碳化硅MOSFET
    • US5726463A
    • 1998-03-10
    • US925823
    • 1992-08-07
    • Dale Marius BrownRichard Joseph SaiaJohn Adam EdmondJohn Williams Palmour
    • Dale Marius BrownRichard Joseph SaiaJohn Adam EdmondJohn Williams Palmour
    • H01L21/04H01L29/24H01L29/423H01L31/0256H01L29/76H01L31/0312
    • H01L29/1608H01L29/66068H01L29/78Y10S438/931
    • A SiC MOSFET having a self-aligned gate structure is fabricated upon a monocrystalline substrate layer, such as a p type conductivity .alpha.6H silicon carbide (SiC) substrate. An SiC n+ type conductivity layer, epitaxially grown on the substrate layer, includes a steep-walled groove etched through the n+ SiC layer and partially into the p SiC layer. The groove is lined with a thin layer of silicon dioxide which extends onto the n+ type conductivity layer. A filling of gate metal over the layer of silicon dioxide is contained entirely in the groove. The silicon dioxide layer includes a first window extending to the filling of gate metal in the groove, and second and third windows extending to the n+ type conductivity layer on either side of the groove, respectively. A gate contact extends through the first window to the filling of gate metal in the groove while drain and source contacts extend through the second and third window, respectively, to make contact with the n+ type conductivity layer in drain and source regions on either side of the groove.
    • 具有自对准栅极结构的SiC MOSFET在单晶衬底层(例如p型导电性α6H碳化硅(SiC))衬底上制造。 在衬底层上外延生长的SiC n +型导电层包括通过n + SiC层蚀刻并部分地进入p SiC层的陡壁沟槽。 凹槽衬有一层二氧化硅,其延伸到n +型导电层上。 栅极金属在二氧化硅层上的填充完全包含在槽中。 二氧化硅层包括延伸到槽中的栅极金属填充物的第一窗口,以及分别延伸到沟槽两侧的n +型导电层的第二和第三窗口。 栅极接触件延伸穿过第一窗口以填充沟槽中的栅极金属,而漏极和源极触点分别延伸穿过第二和第三窗口,以与第二和第三窗口中的漏极和源极区域中的n +型导电层接触, 凹槽