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    • 4. 发明授权
    • Process for fabricating self-aligned split gate flash memory
    • 制造自对准分裂门闪存的工艺
    • US06451654B1
    • 2002-09-17
    • US10029429
    • 2001-12-18
    • Chi-Hui LinChung-Lin HuangYung-Meng Huang
    • Chi-Hui LinChung-Lin HuangYung-Meng Huang
    • H01L218247
    • H01L27/11521H01L27/115
    • The present invention provides a process for fabricating a self-aligned split gate flash memory. First, a patterned gate oxide layer, a first patterned polysilicon layer, and a first patterned mask layer are successively formed on a semiconductor substrate, and a first insulating spacer is formed on their sidewalls. Then, shallow trench isolation (STI) is formed in the substrate using the first patterned mask layer and the first insulating spacer as a mask. Then, the first patterned mask layer and a part of the first insulating spacer are removed to expose the first patterned polysilicon layer. A floating gate region is defined on the first patterned polysilicon layer, and the surface of the first polysilicon layer in the floating gate region is selectively oxidized to form polysilicon oxide layer. Then, the polysilicon oxide layer is used as a mask to remove the underlying first polysilicon layer in a self-aligned manner to form a floating gate. Finally, an intergate insulating layer and a second patterned polysilicon layer as a control gate are succesively formed on the polysilicon oxide layer. The present invention forms a floating gate in a self-aligned manner, which can decreases critical dimension. When an oxidation process is conducted to form the above polysilicon oxide layer, the nitride liner layer and the insulating spacer formed in the trench protect the sides of floating gate from oxygen invasion. This prevents the line width of floating gate from size reduction. Current leakage is also be avoided.
    • 本发明提供一种用于制造自对准分离栅闪存的方法。 首先,在半导体衬底上依次形成图案化栅极氧化物层,第一图案化多晶硅层和第一图案化掩模层,并且在其侧壁上形成第一绝缘间隔物。 然后,使用第一图案化掩模层和第一绝缘间隔物作为掩模在衬底中形成浅沟槽隔离(STI)。 然后,去除第一图案化掩模层和第一绝缘间隔物的一部分以露出第一图案化多晶硅层。 在第一图案化多晶硅层上限定浮栅区域,并且浮栅区域中的第一多晶硅层的表面被选择性地氧化以形成多晶硅氧化物层。 然后,将多晶硅氧化物层用作掩模,以自对准的方式去除下面的第一多晶硅层以形成浮动栅极。 最后,在多晶硅氧化物层上连续地形成作为控制栅极的栅极绝缘层和第二图案化多晶硅层。 本发明以自对准的方式形成浮动栅极,这可以降低临界尺寸。 当进行氧化处理以形成上述多晶硅氧化物层时,形成在沟槽中的氮化物衬垫层和绝缘衬垫保护浮动栅极的侧面免受氧气侵入。 这样可以防止浮动栅极的线宽缩小。 电流泄漏也被避免。
    • 8. 发明授权
    • Method of forming emitter tips on a field emission display
    • 在场发射显示器上形成发射器尖端的方法
    • US06916748B2
    • 2005-07-12
    • US10302488
    • 2002-11-22
    • Yung-Meng Huang
    • Yung-Meng Huang
    • H01J9/02H01L21/302H01L21/461H01L31/12
    • H01J9/025
    • A method of forming emitter tips on a field emission display. A conductive layer is formed on a substrate, and then a photoresist layer is formed on the conductive layer wherein the photoresist layer has at least a pattern for defining predetermined areas of the emitter tips. Next, using plasma etching with the pattern of the photoresist layer as a mask, the conductive layer is etched to become a plurality of emitter stages. The etching rate of the conductive layer is greater than the etching rate of the photoresist layer. Finally, continuous use of plasma etching with an increased vertical-etching rate etches the lateral sidewalls of the emitter stages, thus shaping them as emitter tips.
    • 一种在场发射显示器上形成发射极尖端的方法。 在衬底上形成导电层,然后在导电层上形成光致抗蚀剂层,其中光刻胶层至少具有用于限定发射极尖端的预定区域的图案。 接下来,使用具有光致抗蚀剂层的图案的等离子体蚀刻作为掩模,将导电层蚀刻成多个发射极级。 导电层的蚀刻速率大于光致抗蚀剂层的蚀刻速率。 最后,连续使用具有增加的垂直蚀刻速率的等离子体蚀刻蚀刻发射极级的侧壁,从而将它们形成为发射极尖端。
    • 9. 发明授权
    • Flash memory cell and method for fabricating the same
    • 闪存单元及其制造方法
    • US06900099B2
    • 2005-05-31
    • US10740305
    • 2003-12-18
    • Yung-Meng Huang
    • Yung-Meng Huang
    • H01L21/28H01L29/423H01L21/336
    • H01L29/42324H01L21/28273Y10S438/962Y10S438/979
    • A flash memory cell. The memory cell includes a substrate, a floating gate, a control gate, and a source/drain region. The floating gate, disposed over the substrate and insulated from the substrate, has a plurality of hut structures. The control gate is disposed over the floating gate and insulated from the floating gate. The source/drain region is formed in the substrate. This invention further includes a method of fabricating a flash memory cell. First, a polysilicon layer and a germanium layer are successively formed over a substrate and insulated from the substrate. Subsequently, the substrate is annealed to form a germanium layer having a plurality of hut structures on the polysilicon layer to serve as a floating gate with the polysilicon layer. Next, a control gate is formed over the floating gate and insulated from the floating gate. Finally, a source/drain region is formed in the substrate.
    • 闪存单元。 存储单元包括衬底,浮置栅极,控制栅极和源极/漏极区域。 设置在基板上并与基板绝缘的浮动栅极具有多个小屋结构。 控制栅极设置在浮动栅极上并与浮动栅极绝缘。 源极/漏极区域形成在衬底中。 本发明还包括制造闪存单元的方法。 首先,在基板上依次形成多晶硅层和锗层,并与基板绝缘。 随后,将基板退火以在多晶硅层上形成具有多个小室结构的锗层,以用作具有多晶硅层的浮动栅极。 接下来,控制栅极形成在浮动栅极上并与浮动栅极绝缘。 最后,在衬底中形成源/漏区。