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    • 2. 发明授权
    • Method for improving bit line to capacitor electrical failures on DRAM circuits using a wet etch-back to improve the bit-line-to-capacitor overlay margins
    • 使用湿式回蚀技术改善DRAM电路上电容器电气故障的位线的方法,以改善位线电容器覆盖边界
    • US06436762B1
    • 2002-08-20
    • US09855238
    • 2001-05-14
    • Kuo-Chyuan TzengTse-Liang YingMin-Hsiung ChiangHsiao-Hui TsengChung-Wei Chang
    • Kuo-Chyuan TzengTse-Liang YingMin-Hsiung ChiangHsiao-Hui TsengChung-Wei Chang
    • H01L21/02H01L21/8242H01L27/108H01L21/8234H01L21/20
    • H01L27/10888H01L27/10811H01L28/91
    • A method is described for making capacitor-under-bit line (CUB) DRAM cells with improved overlay margins between bit lines and capacitor top electrodes. After forming FETs for the memory cells, an interpolysilicon oxide (IPO) layer is deposited, and first and second plug contacts are formed in the IPO to the FET source/drain areas for capacitors and bit line contacts, respectively. A capacitor node oxide is deposited, and first openings are etched in which crown capacitor bottom electrodes are formed. After etching back the node oxide a thin interelectrode dielectric layer is formed and a conformal conducting layer is deposited to form capacitor top electrodes. A photoresist mask is used to etch openings in the conducting layer over the second plug contacts, and an isotropic etch is used to recess the openings under the mask to increase the spacing between the capacitor top electrodes and the bit line contacts to improve the overlay margin. The photoresist mask is removed and an interlevel dielectric (ILD) layer is deposited. Bit-line contact openings are etched in the ILD layer aligned over the recessed openings and in the node oxide to the second contact plugs. Bit-line contact plugs are formed extending through the recessed openings, and a first conducting layer is deposited and patterned to form bit lines and to complete the memory cells for the DRAM.
    • 描述了一种用于制造具有改进的位线和电容器顶部电极之间的覆盖边缘的电容器下位线(CUB)DRAM单元的方法。 在形成用于存储单元的FET之后,沉积多晶硅氧化物(IPO)层,并且在IPO中分别将第一和第二插头触点形成到用于电容器和位线触点的FET源极/漏极区域。 沉积电容器节点氧化物,并且蚀刻第一开口,其中形成冠电容器底部电极。 在蚀刻回节点氧化物之后,形成薄的电极间电介质层,并且淀积保形导电层以形成电容器顶部电极。 使用光致抗蚀剂掩模来蚀刻导电层上的第二插头触点上的开口,并且使用各向同性蚀刻来凹陷掩模下方的开口以增加电容器顶部电极和位线触点之间的间隔,以改善覆盖边缘 。 去除光致抗蚀剂掩模并沉积层间电介质(ILD)层。 在ILD层中蚀刻位线接触开口,其在凹入的开口上以及在节点氧化物中对齐到第二接触插塞。 位线接触插塞形成为延伸穿过凹入的开口,并且第一导电层被沉积和图案化以形成位线并且完成用于DRAM的存储单元。
    • 3. 发明授权
    • MIM process for logic-based embedded RAM having front end manufacturing operation
    • 用于具有前端制造操作的基于逻辑的嵌入式RAM的MIM工艺
    • US06656786B2
    • 2003-12-02
    • US10000896
    • 2001-11-02
    • Min-Hsiung ChiangHsiao-Hui TsengHsien-Yuan ChangTazy-Schiuan Yang
    • Min-Hsiung ChiangHsiao-Hui TsengHsien-Yuan ChangTazy-Schiuan Yang
    • H01L218242
    • H01L27/10852H01L27/10814H01L27/10894H01L28/60Y10S977/888
    • A method and system for manufacturing an MIM capacitor for utilization with a logic-based embedded DRAM device. At least one transistor, an interlayer dielectric, at least one contact and at least one metal one layer are generally formed on a substrate during a front end manufacturing operation of the capacitor on the substrate. An inter-metal dielectric layer is deposited upon the substrate, followed thereafter by a chemical mechanical polishing operation. Additionally, a lithographic operation is performed upon the substrate. Also, at least one dielectric deposition layer is generally on the substrate, followed thereafter by a chemical mechanical polishing operation and a stop on an oxide layer formed on the substrate. At least one metal two layer may then be formed on substrate and associated layers thereof, thereby resulting in the formation of a capacitor fully compatible with logic-based devices and processes thereof.
    • 一种制造用于利用基于逻辑的嵌入式DRAM器件的MIM电容器的方法和系统。 在基板上的电容器的前端制造操作期间,通常在基板上形成至少一个晶体管,层间电介质,至少一个触点和至少一个金属层。 金属介电层沉积在基板上,其后通过化学机械抛光操作。 另外,在基板上执行光刻操作。 此外,至少一个电介质沉积层通常在衬底上,随后通过化学机械抛光操作和在形成在衬底上的氧化物层上的停止。 然后可以在衬底及其相关层上形成至少一个金属二层,从而形成与基于逻辑的器件及其工艺完全兼容的电容器。
    • 4. 发明授权
    • MIM process for logic-based embedded RAM
    • 基于逻辑的嵌入式RAM的MIM过程
    • US06656785B2
    • 2003-12-02
    • US09978421
    • 2001-10-15
    • Min-Hsiung ChiangHsiao-Hui TsengHsien-Yuan Chang
    • Min-Hsiung ChiangHsiao-Hui TsengHsien-Yuan Chang
    • H01L218242
    • H01L27/10852H01L21/31604H01L27/10855H01L27/10894H01L28/55H01L28/91
    • A method for forming a metal-interlayer-metal (MIM) device in an embedded memory device, including semiconductor devices thereof. An MIM device can be formed upon a semiconductor substrate utilizing no more than one additional photo mask layer prior to the implementation of a back-end-of-line (BEOL) semiconductor fabrication operation, such that the MIM device can be configured as a low temperature MIM device that is fully compatible with logical semiconductor devices, thereby reducing associated manufacturing costs. The MIM device may be configured as an MIM capacitor for logic-based embedded DRAM devices, resulting in a high capacitance performed via an effective area extension of DRAM cell capacitors. Additonally, a low-temperature MIM capacitor thereof may be readily integrated for both Cu (Copper) and AlCu (Aluminum Copper) BEOL fabrication processes.
    • 一种在包括其半导体器件的嵌入式存储器件中形成金属 - 层间金属(MIM)器件的方法。 MIM器件可以在实施后端(BEOL)半导体制造操作之前利用不超过一个附加光掩模层在半导体衬底上形成,使得MIM器件可以被配置为低 与逻辑半导体器件完全兼容,从而降低相关的制造成本。 MIM器件可以被配置为用于基于逻辑的嵌入式DRAM器件的MIM电容器,导致通过DRAM单元电容器的有效区域扩展来执行高电容。 此外,其中的低温MIM电容器可以容易地集成在Cu(铜)和AlCu(Aluminum Copper)BEOL制造工艺中。