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    • 4. 发明申请
    • A method of forming semiconductor structures
    • 一种形成半导体结构的方法
    • US20060234469A1
    • 2006-10-19
    • US11409134
    • 2006-04-21
    • David DickersonRichard LaneCharles DennisonKunal ParekhMark FischerJohn Zahurak
    • David DickersonRichard LaneCharles DennisonKunal ParekhMark FischerJohn Zahurak
    • H01L21/76
    • H01L21/76232H01L21/0332H01L21/76235
    • In one aspect, the invention includes an isolation region forming method comprising: a) forming an oxide layer over a substrate; b) forming a nitride layer over the oxide layer, the nitride layer and oxide layer having a pattern of openings extending therethrough to expose portions of the underlying substrate; c) etching the exposed portions of the underlying substrate to form openings extending into the substrate; d) after etching the exposed portions of the underlying substrate, removing portions of the nitride layer while leaving some of the nitride layer remaining over the substrate; and e) after removing portions of the nitride layer, forming oxide within the openings in the substrate, the oxide within the openings forming at least portions of isolation regions. In another aspect, the invention includes an isolation region forming method comprising: a) forming a silicon nitride layer over a substrate; b) forming a masking layer over the silicon nitride layer; c) forming a pattern of openings extending through the masking layer to the silicon nitride layer; d) extending the openings through the silicon nitride layer to the underlying substrate, the silicon nitride layer having edge regions proximate the openings and having a central region between the edge regions; e) extending the openings into the underlying substrate; f) after extending the openings into the underlying substrate, reducing a thickness of the silicon nitride layer at the edge regions to thin the edge regions relative to the central region; and g) forming oxide within the openings.
    • 一方面,本发明包括一种隔离区形成方法,包括:a)在衬底上形成氧化物层; b)在所述氧化物层上形成氮化物层,所述氮化物层和氧化物层具有延伸穿过其中的开口图案以暴露所述下面的衬底的部分; c)蚀刻下面的衬底的暴露部分以形成延伸到衬底中的开口; d)在蚀刻下面的衬底的暴露部分之后,去除氮化物层的部分,同时留下一些保留在衬底上的氮化物层; 以及e)在去除所述氮化物层的部分之后,在所述衬底的所述开口内形成氧化物,所述开口内的氧化物形成至少部分隔离区域。 另一方面,本发明包括一种隔离区形成方法,包括:a)在衬底上形成氮化硅层; b)在氮化硅层上形成掩模层; c)形成延伸穿过掩模层的开口图案到氮化硅层; d)将开口穿过氮化硅层延伸到下面的衬底,氮化硅层具有靠近开口的边缘区域,并且在边缘区域之间具有中心区域; e)将开口延伸到下面的基底中; f)在将开口延伸到下面的基底之后,减小边缘区域处的氮化硅层的厚度,以使边缘区域相对于中心区域变薄; 和g)在开口内形成氧化物。
    • 7. 发明申请
    • Semiconductor substrates and field effect transistor constructions
    • 半导体衬底和场效应晶体管结构
    • US20060228893A1
    • 2006-10-12
    • US11448257
    • 2006-06-06
    • John ZahurakDavid Hwang
    • John ZahurakDavid Hwang
    • H01L21/302H01L21/461
    • H01L29/6659H01L21/28044H01L29/4933H01L29/6656H01L29/7833
    • The invention includes methods of forming field effect transistor gates. In one implementation, a series of layers is formed proximate a semiconductive material channel region. The layers comprise a gate dielectric layer and a conductive metal-comprising layer having an ion implanted polysilicon layer received therebetween. Patterned masking material is formed over the series of layers. Using the patterned masking material as a mask, etching is conducted through the conductive metal-comprising layer and only partially into the ion implanted polysilicon layer. After such etching, the ion implanted polysilicon is annealed effective to electrically activate implanted impurity atoms received therein. Other aspects and implementations are contemplated.
    • 本发明包括形成场效应晶体管栅极的方法。 在一个实现中,在半导体材料沟道区域附近形成一系列层。 这些层包括栅极电介质层和在其间容纳离子注入的多晶硅层的导电金属层。 在一系列层上形成图案化掩模材料。 使用图案化掩模材料作为掩模,通过导电金属包层进行蚀刻,并且仅部分地进入离子注入的多晶硅层。 在这种蚀刻之后,离子注入的多晶硅被退火有效地电激活其中接收的注入杂质原子。 考虑了其他方面和实现。
    • 8. 发明申请
    • Double blanket ion implant method and structure
    • 双层离子注入法和结构
    • US20050181567A1
    • 2005-08-18
    • US11094377
    • 2005-03-31
    • Mark FischerCharles DennisonFawad AhmedRichard LaneJohn ZahurakKunal Parekh
    • Mark FischerCharles DennisonFawad AhmedRichard LaneJohn ZahurakKunal Parekh
    • H01L21/265H01L21/28H01L21/336H01L21/8234H01L21/8244
    • H01L21/2652H01L21/2658H01L21/28247H01L29/6656H01L29/6659
    • A double blanket ion implant method for forming diffulsion regions in memory array devices, such as a MOSFET access device is disclosed. The method provides a semiconductor substrate with a gate structure formed on its surface Next, a first pair of diffulsion regions are formed in a region adjacent to the channel region by a first blanket ion implantation process. The first blanket ion implantation process has a first energy level and dose. The device is subjected to oxidizing conditions, which form oxidized sidewalls on the gate structure. A second blanket ion implantation process is conducted at the same location as the first ion implantation process adding additional dopant to the diffusion regions. The second blanket ion implantation process has a second energy level and dose. The resultant diffusion regions provide the device with improved static refresh performance over prior art devices. In addition, the first and second energy levels and doses are substantially lower than an energy level and dose used in a prior art single implantation process.
    • 公开了一种用于在诸如MOSFET访问装置的存储器阵列器件中形成差分区域的双层离子注入方法。 该方法提供了在其表面上形成栅极结构的半导体衬底。接下来,通过第一覆盖离子注入工艺在与沟道区相邻的区域中形成第一对差分区域。 第一次毯式离子注入工艺具有第一能级和剂量。 该器件经受氧化条件,其在栅极结构上形成氧化的侧壁。 在与第一离子注入工艺相同的位置处进行第二覆盖离子注入工艺,向扩散区域添加额外的掺杂剂。 第二次毯子离子注入过程具有第二能量水平和剂量。 所得到的扩散区域提供了比现有技术的装置更好的静态刷新性能的装置。 此外,第一和第二能量水平和剂量基本上低于现有技术单一植入过程中使用的能级和剂量。