Monte Carlo analysis of ultrahigh-speed InP/InGaAs HBTs

✍ Scribed by G. Khrenov; E. Kulkova

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 669 KB
• Volume: 11
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19960220)11:3<154::aid-mop12>3.0.co;2-b

✦ Synopsis

The high-speed characteristics of InP/InGaAs HBTs with two different collector structures have been investigated using an ensemble Monte Carlo particle simulator. It has been demonstrated that vertical scaling of a standard HBT structure does not result in a substantial improvement of overall speed performance due to the increasing collector capacitance chargine time. As essential reduction of the collector transit delay time has been observed for HBT with nonuniform& doped (n--p+-n--n+) collector structure. The collector transit delay time is reduced due to the extension of the velociy overshoot @on in the collector. The parameters of HBT with proposed collector structure (n--p+-n--n+) have been optimized i n order to obtain the ultimate high-frequency performance under the high collector voltage.