LDMOS器件源-衬版图结构优化对ESD性能影响的研究

To enhance the robustness of LDMOS ESD protection devices, the influence of a source-bulk layout structure is analyzed by theoretical analysis and numerical simulation. Novel structures with varied source-bulk layout structures are fabricated and compared. As demonstrated by TLP testing, the optimized structure has an 88% larger It2 than a conventional one, and its Vtl is reduced from 55.53 to 50.69 V.     

硅双结型色敏器件蓝紫响应度的研究与改善

尝试选择不同的衬底材料、不同的工艺条件,以及合理的结构,来改善硅双结色敏器件的蓝紫光响应,并在此基础上制作了蓝紫响应较好的器件。通过测试与分析,得出采用单晶衬底材料、深结较浅工艺的N PN型器件蓝紫响应度较好的结论。     

用于电源线间ESD保护的新型高维持电压的SCR-LDMOS器件

The low snapback holding voltage of the SCR-LDMOS device makes it susceptible to latch-up failure,when used in power-rail ESD(electro-static discharge) clamp circuits.In order to eliminate latch-up risk,this work presents a novel SCR-LDMOS structure with an N-type implantation layer to achieve a 17 V holding voltage and a 5.2 A second breakdown current.The device has been validated using TLP measurement analysis and is applied to a power-rail ESD clamp in half-bridge driver ICs.     

Novel gate and substrate triggering techniques for deep sub-micron ESD protection devices

As technology feature size is reduced, ESD becomes the dominant failure mode due to lower gate oxide breakdown voltage. In this paper, the effectiveness of new gate and substrate triggering techniques has been investigated to lower the trigger voltage of the LVTSCR and MOSFET based ESD protection circuits using 2D simulations and HBM/TLP measurements. The simulation results show that the using these techniques reduces the ESD triggering voltage by 63 and 44% for MOSFET-based and LVTSCR-based ESD structures, respectively, under 2 kV HBM ESD stress. The effectiveness of proposed gate and substrate triggering techniques is also confirmed by the HBM and TLP measurements.     

静电放电抗扰度试验与重复性研究

介绍了静电放电抗扰度试验,并阐述了影响重复性的主要因素。     

一种应用于深亚微米CMOS工艺的ESD保护电路

本文研究了一种基于动态栅极悬浮技术的ESD保护电路,并根据全芯片ESD防护的要求设计了试验电路。采用TSMC 0.18μm CMOS工艺实现了试验电路,测试显示芯片的ESD失效电压达到了7kV。     

一种新型双Fin ESD防护单元研究

为满足小尺寸器件的ESD防护需求,基于Fin技术,提出了一种具有寄生SCR的STI双Fin结构。通过采用双Fin布局和深掺杂技术,减小了器件的基区宽度,避免了Fin技术中由弱电导调制导致的SCR无法开启的现象。仿真结果表明,相比于DFSD结构,新结构失效电流I_t2/Wlayout从21.67 mA/μm增加到28.33 mA/μm;触发电压V_t1从14.08 V减小到9.64 V。在ESD来临时,新结构能够实现有效的开启,泄放大电流。     

静电（ESD）的产生和防护

静电在我们周围随处可以产生,虽然对人体影响不大,但对一些电子元器件却能产生很大影响。有多种办法可以减少甚至消除静电的影响。文中从人体、机器、材料、环境、方法五个方面来介绍了静电的防护。     

高压gg-LDMOS在ESD应力条件下的热特性研究

The thermal characteristics of high voltage gg-LDMOS under ESD stress conditions are investigated in detail based on the Sentaurus process and device simulators.The total heat and lattice temperature distributions along the Si–SiO2 interface under different stress conditions are presented and the physical mechanisms are discussed in detail.The influence of structure parameters on peak lattice temperature is also discussed,which is useful for designers to optimize the parameters of LDMSO for better ESD performance.     

Thermal characteristics investigation of high voltage grounded gate-LDMOS under ESD stress conditions

The thermal characteristics of high voltage gg-LDMOS under ESD stress conditions are investigated in detail based on the Sentaurus process and device simulators. The total heat and lattice temperature distributions along the Si-SiO_2 interface under different stress conditions are presented and the physical mechanisms are discussed in detail. The influence of structure parameters on peak lattice temperature is also discussed, which is useful for designers to optimize the parameters of LDMSO for better ESD performance.     

MOS器件的ESD失效

静电放电(ESD)对半导体器件,尤其是金属氧化物半导体(MOS)器件的影响日趋凸显,而相关的研究也是备受关注.综述了静电放电机理和3种常用的放电模型,遭受ESD应力后的MOS器件失效机理,MOS器件的两种失效模式;总结了ESD潜在性失效灵敏表征参量及检测方法;并提出了相应的静电防护措施.