In this study, we investigate the electrical and noise performances of accumulation-mode n- and p-MOSFETs on Si(110) wafers and compare them with conventional MOSFETs fabricated either on Si(100) or Si(110) wafers. With regard to electrical performances, accumulation-mode p-type MOSFETs are in every aspect superior. However, its n-type counterpart does not provide the best performances even though they are still superior to conventional transistors when fabricated on the same type of wafer. Conventional inversion-mode n-MOSFETs on Si(100) wafers still display the best performances. The simultaneous improvement and reduction in drivability respectively in the p- and n-type transistors make the accumulationmode MOSFETs fabricated on Si(110) wafers extremely well suited for complementary technologies owing to their great balance in terms of drivability. With regard to noise evaluation, accumulation-mode MOSFETs on Si(110) wafers exhibit the highest noise level even though they compare relatively well with the inversion transistors on Si(110) wafers, especially for p-type ones. The lowest noise level is obtained for conventional inversion-mode MOSFETs on Si(100) wafers, and the type of wafer upon which transistors are fabricated is the reason. Indeed, the fabrication of high-quality Si/SiO2 interfaces is better achieved for silicon wafers with a (100) crystallographic orientation, leading to few interface defects and consequently less noise.
ASJC Scopus subject areas
- Physics and Astronomy(all)