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Using positive surface charge instead of traditional γ-ray total dose irradiation, the electric field distribution of a P-channel VDMOS terminal has been analyzed. A novel terminal structure for improving the total dose irradiation hardened of P-channel VDMOS has been proposed, and the structure is simulated and demonstrated with a -150 V P-channel VDMOS. The results show that the peak current density is reduced from 5.51 × 10^3 A/cm^2 to 2.01 × 10^3 A/cm^2, and the changed value of the breakdown voltage is 2.5 V at 500 krad(Si). Especially, using 60Co and X-ray to validate the results, which strictly match with the simulated values, there is not any added mask or process to fabricate the novel structure, of which the process is compatible with common P-channel VDMOS processes. The novel terminal structure can be widely used in total irradiation hardened P-channel VDMOS design and fabrication, which holds a great potential application in the space irradiation environment. 相似文献
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提出了一种新型SBD器件结构,并应用于高压SBD产品的研制。该结构通过在肖特基势垒区的硅表面增加一层表面缓冲掺杂层(Improved Surface Buffer Dope),将高压SBD的击穿点从常规结构的PN结保护环区域转移到平坦的肖特基势垒区,从根本上提高了器件的反向静电放电(ESD)和浪涌冲击能力。经流片验证,采用该结构的10A150VSBD产品和10A200VSBD产品均通过了反向静电放电(HBM模式)8kV的考核,达到目前业界领先水平。该结构工艺实现简单,可以应用于100V以上SBD的批量生产。 相似文献
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介绍了制版工艺中常见的缺陷类型,分析了缺陷产生与温湿度的关系。通过实际工作应用,就缺陷控制的办法进行了有益的探讨,对光掩模版的制造有一定的指导意义。 相似文献