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    • 3. 发明授权
    • Method for forming self-aligned contacts and local interconnects using decoupled local interconnect process
    • 使用去耦局部互连过程形成自对准触点和局部互连的方法
    • US06482699B1
    • 2002-11-19
    • US09685972
    • 2000-10-10
    • YongZhong HuFei WangWenge YangYu SunRamkumar Subramanian
    • YongZhong HuFei WangWenge YangYu SunRamkumar Subramanian
    • H01L21336
    • H01L21/76897H01L21/76895H01L2924/3011
    • A method of manufacturing a semiconductor device is provided in which multi-layer structures are formed on a semiconductor substrate to form core and peripheral regions. Sidewall spacers are formed around the multi-layer structures and source and drain regions are implanted adjacent the sidewall spacers and a stop layer is deposited over the semiconductor substrate after which a dielectric layer is deposited over the stop layer. A first and second photoresist contact masks are deposited, processed, and used to respectively etch core and peripheral contact openings. The first and photoresist contact masks are respectively removed after each etching step. A conductive material is deposited over the dielectric layer and in the core and peripheral contact openings and is chemical mechanical planarized to remove the conductive material over the dielectric layer so the conductive material is left isolated in the core and peripheral contact openings with core contacts to the source/drain regions and peripheral contacts to the local interconnect gate contacts of the multi-layer structures and the source/drain regions.
    • 提供一种制造半导体器件的方法,其中在半导体衬底上形成多层结构以形成芯和周边区域。 在多层结构周围形成侧壁间隔物,并且将源极和漏极区域相邻于侧壁间隔物注入,并且在半导体衬底上沉积停止层,之后在停止层上沉积电介质层。 第一和第二光致抗蚀剂接触掩模被沉积,处理并用于分别蚀刻芯部和外围接触开口。 在每个蚀刻步骤之后分别去除第一和光致抗蚀剂接触掩模。 导电材料沉积在电介质层上以及芯和外围接触开口中,并进行化学机械平面化以去除电介质层上的导电材料,因此导电材料在核心和外围接触开口中被隔离,其核心接触到 源极/漏极区域和周边接触到多层结构和源极/漏极区域的局部互连栅极触点。
    • 5. 发明授权
    • Semiconductor manufacturing method using a high extinction coefficient dielectric photomask
    • 使用高消光系数电介质光掩模的半导体制造方法
    • US06294460B1
    • 2001-09-25
    • US09586254
    • 2000-05-31
    • Ramkumar SubramanianMinh Van NgoSuzette K. PangrleKashmir Sahota
    • Ramkumar SubramanianMinh Van NgoSuzette K. PangrleKashmir Sahota
    • H01L214763
    • H01L21/7688H01L21/76802Y10S438/952
    • A method is provided for manufacturing a semiconductor with fewer steps and minimized variation in the etching process by using SiON as a bottom antireflective (BARC) layer and hard mask in conjunction with a thin photoresist layer. In one embodiment, an etch-stop layer is deposited on a semiconductor substrate, a dielectric layer is deposited on top of the etch-stop layer, and a BARC is deposited on top of the dielectric layer. The BARC is deposited by PECVD to enrich the BARC with semiconductor material to increase the extinction coefficient of the BARC so its thickness can be reduced. A photoresist layer with a thickness less than the thickness of the BARC is then deposited on top of the BARC. The photoresist is then patterned, photolithographically processed, developed, and removed. The BARC is then etched away in the pattern developed on the photoresist and the photoresist is then removed. The BARC is then used as a mask for the etching of the dielectric layer. A conductive material is deposited over the BARC and the dielectric layer and is subsequently removed in the process of polishing the conductive material without requiring a separate BARC removal step.
    • 提供了一种通过使用SiON作为底部抗反射(BARC)层和与薄的光致抗蚀剂层结合的硬掩模来制造具有较少步骤和最小化蚀刻工艺的半导体的方法。 在一个实施例中,蚀刻停止层沉积在半导体衬底上,电介质层沉积在蚀刻停止层的顶部,并且BARC沉积在电介质层的顶部上。 BARC通过PECVD沉积,以使BARC富集半导体材料,以增加BARC的消光系数,从而减小其厚度。 然后将厚度小于BARC的厚度的光致抗蚀剂层沉积在BARC的顶部。 然后将光致抗蚀剂图案化,光刻加工,显影和除去。 然后将BARC以在光致抗蚀剂上显影的图案蚀刻掉,然后除去光致抗蚀剂。 然后将BARC用作蚀刻电介质层的掩模。 导电材料沉积在BARC和电介质层上,随后在抛光导电材料的过程中被去除,而不需要单独的BARC去除步骤。
    • 8. 发明授权
    • Damascene processing employing low Si-SiON etch stop layer/arc
    • 使用低Si-SiON蚀刻停止层/电弧的镶嵌加工
    • US06459155B1
    • 2002-10-01
    • US09729528
    • 2000-12-05
    • Ramkumar SubramanianDawn M. HopperMinh Van Ngo
    • Ramkumar SubramanianDawn M. HopperMinh Van Ngo
    • H01L214763
    • H01L21/76829H01L21/0276H01L21/0332H01L21/76807
    • The dimensional accuracy of trench formation and, hence, metal line width, in damascene technology is improved by employing a low Si—SiON etch stop layer/ARC with reduced etch selectivity with respect to the overlying dielectric material but having a reduced extinction coefficient (k). Embodiments include via first-trench last dual damascene techniques employing a low Si—SiON middle etch stop layer/ARC having an extinction coefficient of about −0.3 to about −0.6, e.g., about −0.35, with reduced silicon and increased oxygen vis-à-vis a SiON etch stop layer having an extinction coefficient of about −1.1. Embodiments also include removing about 60% to about 90% of the low Si—SiON etch stop layer/ARC during trench formation, thereby reducing capacitance.
    • 通过使用低Si-SiON蚀刻停止层/ ARC,相对于上覆电介质材料具有降低的蚀刻选择性但具有降低的消光系数(k(k)),改善了镶嵌技术中沟槽形成的尺寸精度以及因此金属线宽度 )。 实施例包括通过第一沟槽最后的双镶嵌技术,其使用具有约-0.3至约-0.6,例如约-0.35的消光系数的低Si-SiON中间蚀刻停止层/ ARC,其中还原的硅和增加的氧相对于 - 具有约-1.1的消光系数的SiON蚀刻停止层。 实施例还包括在沟槽形成期间去除约60%至约90%的低Si-SiON蚀刻停止层/ ARC,从而降低电容。