中国物理B ›› 2019, Vol. 28 ›› Issue (3): 37201-037201.doi: 10.1088/1674-1056/28/3/037201
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Qi Li(李琦), Zhao-Yang Zhang(张昭阳), Hai-Ou Li(李海鸥), Tang-You Sun(孙堂友), Yong-He Chen(陈永和), Yuan Zuo(左园)
Qi Li(李琦), Zhao-Yang Zhang(张昭阳), Hai-Ou Li(李海鸥), Tang-You Sun(孙堂友), Yong-He Chen(陈永和), Yuan Zuo(左园)
摘要:
A stacked lateral double-diffused metal-oxide-semiconductor field-effect transistor (LDMOS) with enhanced depletion effect by surface substrate is proposed (ST-LDMOS), which is compatible with the traditional CMOS processes. The new stacked structure is characterized by double substrates and surface dielectric trenches (SDT). The drift region is separated by the P-buried layer to form two vertically parallel devices. The doping concentration of the drift region is increased benefiting from the enhanced auxiliary depletion effect of the double substrates, leading to a lower specific on-resistance (Ron,sp). Multiple electric field peaks appear at the corners of the SDT, which improves the lateral electric field distribution and the breakdown voltage (BV). Compared to a conventional LDMOS (C-LDMOS), the BV in the ST-LDMOS increases from 259 V to 459 V, an improvement of 77.22%. The Ron,sp decreases from 39.62 mΩ·cm2 to 23.24 mΩ·cm2 and the Baliga's figure of merit (FOM) of is 9.07 MW/cm2.
中图分类号: (Elemental semiconductors)