An anomalous total dose effect that the long length device is more susceptible to total ionizing dose than the short one is observed with the 0.13？μm partially depleted silicon-on-insulator technology. The measured ...An anomalous total dose effect that the long length device is more susceptible to total ionizing dose than the short one is observed with the 0.13？μm partially depleted silicon-on-insulator technology. The measured results and 3D technology computer aided design simulations demonstrate that the devices with different channel lengths may exhibit an enhanced reverse short channel effect after radiation. It is ascribed to that the halo or pocket implants introduced in processes results in non-uniform channel doping profiles along the device length and trapped charges in the shallow trench isolation regions.展开更多
A measuring system for high-speed hydrogen ice pellet was introduced in this paper and the photographing of flying pellet taken therein. With the system, a pellet (minimum size of φ 0.3 mm) velocity (ranging from 50 ...A measuring system for high-speed hydrogen ice pellet was introduced in this paper and the photographing of flying pellet taken therein. With the system, a pellet (minimum size of φ 0.3 mm) velocity (ranging from 50 m/s to 2500 m/s) can be measured in the HL-1M tokamak fueling experiments. By analyzing photographs and the conditions of frozen pellets (including gas supply, gas replenishment, temperature controlling etc), the pellet-freezing technology is summarized in the paper.展开更多
X连锁高IgM综合征(X-linked hyper-immunoglobulin M syndrome,XHIGM)是罕见的原发性免疫缺陷病,该病以反复感染为特征,易感染机会致病微生物。临床上以马尔尼菲篮状菌肺炎起病的XHIGM更为罕见。该文回顾性分析1例以马尔尼菲篮状菌肺炎...X连锁高IgM综合征(X-linked hyper-immunoglobulin M syndrome,XHIGM)是罕见的原发性免疫缺陷病,该病以反复感染为特征,易感染机会致病微生物。临床上以马尔尼菲篮状菌肺炎起病的XHIGM更为罕见。该文回顾性分析1例以马尔尼菲篮状菌肺炎起病的X连锁高IgM综合征婴儿的临床资料,实验室、影像学检查结果和诊疗经过并探讨其基因型,结合最新文献复习,以提高对该疾病的认识。展开更多
There are progressive architects, engineers, contractors and owners that adopt some of the newest technologies for financial benefits. The moving force to integrate BIM （building information modeling） tools may come...There are progressive architects, engineers, contractors and owners that adopt some of the newest technologies for financial benefits. The moving force to integrate BIM （building information modeling） tools may come from owners demanding a BIM deliverable to approve the work on these projects. Ifa contractor can produce this deliverable, then obtaining the project could be done in a more convincing way. Contractors are confronted with problems in selecting proper construction methods and applying their knowledge about specific and well-defined technologies to a project. Their decision-making process and better project outcomes can be improved through a database-oriented library of construction methods and therefore, a consistent methodology to classify construction methods is needed. This goal can be achieved by introducing rigorous construction method descriptors. The technology solution and the trending need of owners to pay software companies to develop software that really works for them and contractors are empirically proved in this paper through a technology ontology and BIM-enabled estimating procedure. An exploratory case study is presented. This way, owners can efficiently demand deliverables that can be utilized by them downstream, allowing contractors and subcontracting trades to work efficiently and to assure the daily flow of operations.展开更多
Magnetic liquid can produce alternative internal pressure under the alternative high-frequency gradient magnetic field.Because it has higher bulk modulus,the internal pressure results in its volume change.Using piezoe...Magnetic liquid can produce alternative internal pressure under the alternative high-frequency gradient magnetic field.Because it has higher bulk modulus,the internal pressure results in its volume change.Using piezoelectric transducers,the ultrasonic wave generated by the vibration of magnetic liquids can be detected,which shows that the magnetic liquids have the magnetostrictive effect and can generate the ultrasonic vibration under the alternative magnetic gradient field.Some nonmagnetic abrasives and rust-proofing agents can be mixed into the magnetic liquids,under the alternative magnetic field,the abrasives held by magnetic liquids grind the surface of the workpieces,and thus,the finishing for the surface with complex shape,mold cavity and inner wall of tiny tubes can be realized.展开更多
为适应高能物理实验中飞行时间探测器对高速飞行粒子高分辨率的时间测量需求,本文提出了一种差分结构的时间数字转换器(Time to Digital Convertor,TDC),其主要测量部分采用差分延迟环实现,并基于该结构设计了一款TDC芯片。差分延迟环TD...为适应高能物理实验中飞行时间探测器对高速飞行粒子高分辨率的时间测量需求,本文提出了一种差分结构的时间数字转换器(Time to Digital Convertor,TDC),其主要测量部分采用差分延迟环实现,并基于该结构设计了一款TDC芯片。差分延迟环TDC主要由时间测量核心模块、时间测量数据传输模块、延迟环校准模块以及时钟产生模块组成。对于时间测量核心模块,又将其细化为延迟环模块、温度计码生成模块以及粗计数与细计数生成模块三个部分。该TDC芯片采用中芯国际(Semiconductor Manufacturing International Corporation,SMIC)0.18μm工艺,版图面积为1.35 mm×1.35 mm,分辨率达到17 ps,精度达到8.5 ps(Root Mean Square,RMS),动态范围为0~210μs,可以满足通常情况下高能物理实验的高精度时间测量需求。展开更多
基于0.18μm CMOS工艺开发了抗总剂量辐射加固技术,制备的1.8 V NMOS器件常态性能良好,器件在500 krad(Si)剂量点时,阈值电压与关态漏电流无明显变化。研究器件的热载流子效应,采用体电流Isub/漏电流Id模型评估器件的HCI寿命,寿命达到5...基于0.18μm CMOS工艺开发了抗总剂量辐射加固技术,制备的1.8 V NMOS器件常态性能良好,器件在500 krad(Si)剂量点时,阈值电压与关态漏电流无明显变化。研究器件的热载流子效应,采用体电流Isub/漏电流Id模型评估器件的HCI寿命,寿命达到5.75年,满足在1.1 Vdd电压下工作寿命大于0.2年的规范要求。探索总剂量辐射效应与热载流子效应的耦合作用,对比辐照与非辐照器件的热载流子损伤,器件经辐照并退火后,受到的热载流子影响变弱。评估加固工艺对器件HCI可靠性的影响,结果表明场区总剂量加固工艺并不会造成热载流子损伤加剧的问题。展开更多
基于标准Bipolar-CMOS-DMOS(BCD)工艺研制的抗辐射电源管理芯片无法满足航天应用要求,抗辐射BCD工艺的发展严重制约了我国在航天领域核心器件的研制。与CMOS器件相比,LDMOS器件具有更高的工作电压和更多的介质结构,更易受到总剂量问题...基于标准Bipolar-CMOS-DMOS(BCD)工艺研制的抗辐射电源管理芯片无法满足航天应用要求,抗辐射BCD工艺的发展严重制约了我国在航天领域核心器件的研制。与CMOS器件相比,LDMOS器件具有更高的工作电压和更多的介质结构,更易受到总剂量问题的困扰。本文基于标准0.18μm BCD工艺,开展了18 V NLDMOS器件总剂量辐射效应研究,提出了一种总剂量辐射加固工艺技术。采用离子注入和材料改性技术工艺,提高了浅槽隔离场区边缘的P型硅反型阈值,从而增强了NLDMOS器件的抗辐射能力。通过对比实验表明,当辐照总剂量为100 krad(Si)时,加固的NLDMOS器件的抗辐射性能明显优于非加固的器件。通过总剂量辐射加固工艺技术的研究,可有效提高器件的抗总剂量辐射能力,避免设计加固造成芯片面积增大的问题。展开更多
基金Supported by the Weapon Equipment Pre-Research Foundation of China under Grant No 9140A11020114ZK34147the Shanghai Municipal Natural Science Foundation under Grant Nos 15ZR1447100 and 15ZR1447200
文摘An anomalous total dose effect that the long length device is more susceptible to total ionizing dose than the short one is observed with the 0.13？μm partially depleted silicon-on-insulator technology. The measured results and 3D technology computer aided design simulations demonstrate that the devices with different channel lengths may exhibit an enhanced reverse short channel effect after radiation. It is ascribed to that the halo or pocket implants introduced in processes results in non-uniform channel doping profiles along the device length and trapped charges in the shallow trench isolation regions.
文摘A measuring system for high-speed hydrogen ice pellet was introduced in this paper and the photographing of flying pellet taken therein. With the system, a pellet (minimum size of φ 0.3 mm) velocity (ranging from 50 m/s to 2500 m/s) can be measured in the HL-1M tokamak fueling experiments. By analyzing photographs and the conditions of frozen pellets (including gas supply, gas replenishment, temperature controlling etc), the pellet-freezing technology is summarized in the paper.
文摘X连锁高IgM综合征(X-linked hyper-immunoglobulin M syndrome,XHIGM)是罕见的原发性免疫缺陷病,该病以反复感染为特征,易感染机会致病微生物。临床上以马尔尼菲篮状菌肺炎起病的XHIGM更为罕见。该文回顾性分析1例以马尔尼菲篮状菌肺炎起病的X连锁高IgM综合征婴儿的临床资料,实验室、影像学检查结果和诊疗经过并探讨其基因型,结合最新文献复习,以提高对该疾病的认识。
文摘Submicron CMOS IC technology, including triple layer resist lithography technology, RIE, LDD, Titanium Salicide, shallow junction, thin gate oxide, no bird's beak isolation and channel's multiple implantation doping technology have been developed. 0.50μm. CMOS integrated circuits have been fabricated using this submicron CMOS process.
文摘There are progressive architects, engineers, contractors and owners that adopt some of the newest technologies for financial benefits. The moving force to integrate BIM （building information modeling） tools may come from owners demanding a BIM deliverable to approve the work on these projects. Ifa contractor can produce this deliverable, then obtaining the project could be done in a more convincing way. Contractors are confronted with problems in selecting proper construction methods and applying their knowledge about specific and well-defined technologies to a project. Their decision-making process and better project outcomes can be improved through a database-oriented library of construction methods and therefore, a consistent methodology to classify construction methods is needed. This goal can be achieved by introducing rigorous construction method descriptors. The technology solution and the trending need of owners to pay software companies to develop software that really works for them and contractors are empirically proved in this paper through a technology ontology and BIM-enabled estimating procedure. An exploratory case study is presented. This way, owners can efficiently demand deliverables that can be utilized by them downstream, allowing contractors and subcontracting trades to work efficiently and to assure the daily flow of operations.
基金Sponsored by Zhejiang Province Scientific and Technological Key Task Program (2007C21025)Ningbo Science and Technological Key Task Program (2007B10010)
文摘Magnetic liquid can produce alternative internal pressure under the alternative high-frequency gradient magnetic field.Because it has higher bulk modulus,the internal pressure results in its volume change.Using piezoelectric transducers,the ultrasonic wave generated by the vibration of magnetic liquids can be detected,which shows that the magnetic liquids have the magnetostrictive effect and can generate the ultrasonic vibration under the alternative magnetic gradient field.Some nonmagnetic abrasives and rust-proofing agents can be mixed into the magnetic liquids,under the alternative magnetic field,the abrasives held by magnetic liquids grind the surface of the workpieces,and thus,the finishing for the surface with complex shape,mold cavity and inner wall of tiny tubes can be realized.
文摘为适应高能物理实验中飞行时间探测器对高速飞行粒子高分辨率的时间测量需求,本文提出了一种差分结构的时间数字转换器(Time to Digital Convertor,TDC),其主要测量部分采用差分延迟环实现,并基于该结构设计了一款TDC芯片。差分延迟环TDC主要由时间测量核心模块、时间测量数据传输模块、延迟环校准模块以及时钟产生模块组成。对于时间测量核心模块,又将其细化为延迟环模块、温度计码生成模块以及粗计数与细计数生成模块三个部分。该TDC芯片采用中芯国际(Semiconductor Manufacturing International Corporation,SMIC)0.18μm工艺,版图面积为1.35 mm×1.35 mm,分辨率达到17 ps,精度达到8.5 ps(Root Mean Square,RMS),动态范围为0~210μs,可以满足通常情况下高能物理实验的高精度时间测量需求。
文摘基于标准Bipolar-CMOS-DMOS(BCD)工艺研制的抗辐射电源管理芯片无法满足航天应用要求,抗辐射BCD工艺的发展严重制约了我国在航天领域核心器件的研制。与CMOS器件相比,LDMOS器件具有更高的工作电压和更多的介质结构,更易受到总剂量问题的困扰。本文基于标准0.18μm BCD工艺,开展了18 V NLDMOS器件总剂量辐射效应研究,提出了一种总剂量辐射加固工艺技术。采用离子注入和材料改性技术工艺,提高了浅槽隔离场区边缘的P型硅反型阈值,从而增强了NLDMOS器件的抗辐射能力。通过对比实验表明,当辐照总剂量为100 krad(Si)时,加固的NLDMOS器件的抗辐射性能明显优于非加固的器件。通过总剂量辐射加固工艺技术的研究,可有效提高器件的抗总剂量辐射能力,避免设计加固造成芯片面积增大的问题。
文摘设计了一款应用于相控阵雷达系统,工作频段8 GHz^12 GHz,中心频率为10 GHz的5位数字移相器,该移相器采用UMC 0.18μm标准CMOS工艺设计实现.五位移相单元分别为11.25°、22.5°、45°、90°和180°,其中180°移相单元采用高-低通滤波器型结构,其余移相单元采用低通π型滤波器结构.通过合理选择参数模型和拓扑结构,优化版图布局设计,实现了电路性能并给出仿真结果.在工作频率范围内,32种移相状态的相位均方根误差<1.08°,幅度均方根误差<1.14 d B,插入损耗值保持在14 d B^20 d B范围内,版图尺寸为2.85×1.15 mm2.
