Active solid-state devices (e.g. – transistors – solid-state diode – Bipolar transistor structure – Plural non-isolated transistor structures in same structure
Reexamination Certificate
2006-06-20
2006-06-20
Lee, Eugene (Department: 2815)
Active solid-state devices (e.g., transistors, solid-state diode
Bipolar transistor structure
Plural non-isolated transistor structures in same structure
C257S575000, C257S580000, C257S582000
Reexamination Certificate
active
07064416
ABSTRACT:
A semiconductor device and a method of fabricating a semiconductor device having multiple subcollectors which are formed in a common wafer, in order to provide multiple structures having different characteristic and frequency response are provided. The subcollectors may be provided using different doses or different material implants resulting in devices having different optimum unity current gain cutoff frequency (fT) and breakdown voltage (BVCEOand BVCBO) on a common wafer.
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Dunn James S.
Lanzerotti Louis D.
Voldman Steven H.
Connolly Bove & Lodge & Hutz LLP
International Business Machines - Corporation
Lee Eugene
LandOfFree
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