Patent ID: 9236458
Filing Date: 2016-01-12
CPC Classification: H01L

Claim Text:
1. A bipolar transistor comprising a semiconductor structure, the semiconductor structure comprising: an emitter area electrically connected to an emitter contact of the bipolar transistor, wherein the emitter area comprises a first conductivity type; a base area electrically connected to a base contact of the bipolar transistor, wherein the base area comprises a second conductivity type; and a collector area electrically connected to a collector contact of the bipolar transistor, wherein the collector area comprises the first conductivity type; wherein the collector area encloses sub areas comprising the second conductivity type or the base area encloses sub areas comprising the first conductivity type, wherein an average density of dopants of the first conductivity type within a region of the collector area enclosing the plurality of enclosed sub areas differs less than 10% from an average density of dopants of the second conductivity type within the plurality of enclosed sub areas or an average density of dopants of the second conductivity type within a region of the base area enclosing the plurality of enclosed sub areas differs less than 10% from an average density of dopants of the first conductivity type within the plurality of enclosed sub areas.