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    • 3. 发明授权
    • Method for forming shallow trench isolation with control of bird beak
    • 用于形成具有鸟喙控制的浅沟槽隔离的方法
    • US06984553B2
    • 2006-01-10
    • US10385483
    • 2003-03-12
    • Pei-Ren Jeng
    • Pei-Ren Jeng
    • H01L21/8238H01L21/331H01L21/76
    • H01L21/76235
    • In a manufacturing method for a shallow trench isolation, first, a multi-layer structure is formed over a semiconductor substrate. A first trench is formed in the multi-layer structure to define an isolation region and an active region. Sidewalls in the first trench are formed by depositing sidewall material over the multi-layer structure and surfaces of the first trench and etching the sidewall material. An isolation trench is then formed in the substrate by etching the substrate using the sidewalls and the multi-layer structure as a mask. Then the sidewalls are etched back to expose a portion of the substrate surface. Thermal oxidation is performed to oxidize the second trench, wherein the etched sidewalls and the multi-layer structure protect the substrate underneath from being oxidized. Then, the oxidized second trench is filled with a filling material and the whole structure is polished. The amount by which the sidewalls are etched back controls a bird beak that is formed in the active region.
    • 在浅沟槽隔离的制造方法中,首先,在半导体衬底上形成多层结构。 在多层结构中形成第一沟槽以限定隔离区域和有源区域。 通过在多层结构和第一沟槽的表面上沉积侧壁材料并蚀刻侧壁材料来形成第一沟槽中的侧壁。 然后通过使用侧壁和多层结构作为掩模蚀刻衬底,在衬底中形成隔离沟槽。 然后将侧壁回蚀以露出衬底表面的一部分。 执行热氧化以氧化第二沟槽,其中蚀刻的侧壁和多层结构保护下方的衬底不被氧化。 然后,用填充材料填充氧化的第二沟槽,并且整个结构被抛光。 侧壁被回蚀的量控制在活性区域中形成的鸟嘴。
    • 7. 发明授权
    • Planarization method of memory unit of flash memory
    • 闪存存储单元的平面化方法
    • US06472271B1
    • 2002-10-29
    • US09863303
    • 2001-05-24
    • Pei-Ren Jeng
    • Pei-Ren Jeng
    • H01L21336
    • H01L27/11526H01L21/31056H01L27/105H01L27/11531
    • The present invention discloses a planarization method of memory unit of a flash memory, wherein a patterned polysilicon layer and a silicon nitride layer are formed in turn on a semiconductor substrate. A silicon dioxide layer is then deposited by the HDPCVD technique. Next, a silicon nitride layer is deposited. Finally, the silicon nitride layer and the silicon dioxide layer thereon are simultaneously removed using hot phosphoric acid. Because the CMP technique is not used in the present invention, the problem of micro scratches will not arise. Therefore, the present invention can assure the requirement of high planarity of memory unit of the flash memory, simplify the process flow, increase the tolerance of the etching mask, and effectively enhance the function of memory unit.
    • 本发明公开了一种闪速存储器存储单元的平面化方法,其中在半导体衬底上依次形成图案化多晶硅层和氮化硅层。 然后通过HDPCVD技术沉积二氧化硅层。 接下来,沉积氮化硅层。 最后,使用热磷酸同时除去其上的氮化硅层和二氧化硅层。 由于在本发明中不使用CMP技术,所以不会产生微小划伤的问题。 因此,本发明可以确保对闪速存储器的高平坦度的要求,简化工艺流程,增加蚀刻掩模的公差,并有效地增强存储单元的功能。
    • 10. 发明授权
    • Planarization method for flash memory device
    • 闪存设备的平面化方法
    • US06391718B1
    • 2002-05-21
    • US09788705
    • 2001-02-20
    • Pei-Ren Jeng
    • Pei-Ren Jeng
    • H01L21336
    • H01L27/11526H01L21/31056H01L27/105H01L27/11531
    • A method to planarize a flash memory device, wherein the method is applied on a substrate having a polysilicon layer and a cap layer sequentially formed thereon. Thereafter, the cap layer and the polysilicon layer are patterned to form the peripheral circuit region and the memory cell region. A dielectric layer is then formed on the substrate, covering the cap layer. A portion of the dielectric layer is further removed to expose a part of the cap layer, such that the dielectric layer above the cap layer and the dielectric layer on both sides of the cap layer become separated. A portion of the dielectric layer in the peripheral circuit region is then removed, followed by forming a photoresist layer on the substrate such that a portion of the dielectric layer in the peripheral circuit region and in the memory cell region is exposed. The dielectric layer exposed by the photoresist layer is then removed, followed by removing the photoresist layer. The cap layer is subsequently removed to complete the planazation of the flash memory device.
    • 一种平面化闪速存储器件的方法,其中所述方法被施加在其上顺序地形成有多晶硅层和盖层的衬底上。 此后,盖层和多晶硅层被图案化以形成外围电路区域和存储单元区域。 然后在衬底上形成介电层,覆盖覆盖层。 进一步去除电介质层的一部分以露出盖层的一部分,使得覆盖层上方的电介质层和盖层两侧的电介质层变得分离。 然后去除外围电路区域中的介电层的一部分,然后在基板上形成光致抗蚀剂层,使得外围电路区域和存储单元区域中的介电层的一部分露出。 然后去除由光致抗蚀剂层暴露的电介质层,然后除去光致抗蚀剂层。 随后去除盖层以完成闪存装置的平面化。