SiGe HBT Technology Based on a 0.13-<inline-formula> <tex-math notation="TeX">$\mu{\rm m}$ </tex-math></inline-formula> Process Featuring an <inline-formula> <tex-math notation="TeX">${f}_{\rm MAX}$ </tex-math></inline-formula> of 325 GHz
Abstract:A self-aligned SiGe HBT technology achieving a cutoff frequency (f T ) of 253 GHz was developed using a selective SiGe epitaxial growth process. Germanium concentration in an i-SiGe layer just under a p + intrinsic base region was raised to 27.4% to improve f T , and boron concentration in the intrinsic base region reached 2.4 × 10 20 cm −3 as a deposition to maintain a breakdown voltage of 1.5 V. A 0.13-μm SiGe BiCMOS technology geometrically advanced from an earlier 0.18-μm version shrinks the emitter width … Show more
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