Method of Manufacturing a Bipolar Transistor and Bipolar Transistor

摘要

Disclosed is a method of manufacturing a bipolar transistor comprising providing a substrate (10) including an active region (22); depositing a layer stack; forming a base window (38) over the active region in said layer stack; forming at least one pillar (40) in the base window, wherein a part of the pillar is resistant to polishing; depositing an emitter material (46) over the resultant structure, thereby filling said base window; and planarizing the deposited emitter material by polishing. A bipolar transistor manufactured in accordance with this method is also disclosed.