摘要
文章对三极管版图结构和器件特性关系进行了研究,设计了5种常规的纵向NPN管结构,从电流能力和寄生电阻两方面讨论了不同结构的差异和优劣。认为单基极接触结构比双基极接触结构具有更优的电流能力;集电极电流和发射极面积AE并不是按照比例线性增大,尤其在大注入时,集电极电流增大明显低于AE的增大;相同面积的马蹄形结构发射区放置在周围具有更大的AE和电流能力;这些结构在寄生电阻表现上各有优劣。讨论了基极和集电极接触方式差异对三极管电流性能的影响,对电路版图设计提出建议。讨论了EB隔离方式对三极管放大倍数HFE的影响,指出多晶隔离EB结构具有更大的HFE,尤其在小注入时表现显著。通过对这些结构的分析,还提出电流能力更优的梳状结构的版图布局。
The paper give a research for bipolar layout structure.5 structures are designed in the paper. The paper discusses the difference and advantage for all structure from current capacitance and parasitical resistor.Some conclusions are given：the bipolar have stronger current drive with single base contact than double base contact.Collector current is not proportional to emitter area（AE） especially in large injection region.Horse hoof structure has stronger current drive with emitter outside than inside.All the structures have themselves disadvantage and advantage in parasitical resistor.Then the effect on current capacitance of contact of base and collector is discussed and some advices are give to layout design.The EB isolation mode have effect on magnification（HFE）,emitter and base（EB） isolation with polysilicon have higher HFE especially in small injection region.Finally an optimized comb bipolar structure layout is give.
出处
《电子与封装》
2010年第12期36-40,共5页
Electronics & Packaging
