HBT with nitrogen-containing current blocking base collector interface and method for current blocking

A group III-V heterojunction bipolar transistor, comprising:

• collector, base, and emitter layers formed on a substrate in an arrangement defining a base-collector interface;
• base material forming said base layer;
• collector material forming said collector layer and having a wider bandgap than said base material;
• and
• nitrogen incorporated at the base-collector interface in an amount sufficient to reduce a conduction band energy of said collector layer at the base-collector interface to a conduction band energy of said base layer;
• and
• wherein said nitrogen is incorporated in said collector layer.

A group III-V heterojunction bipolar transistor, comprising:

• collector, base, and emitter layers formed on a substrate in an arrangement defining a base-collector interface;
• base material forming said base layer;
• collector material forming said collector layer and having a wider bandgap than said base material;
• and
• nitrogen incorporated at the base-collector interface in an amount sufficient to reduce a conduction band energy of said collector layer at the base-collector interface to a conduction band energy of said base layer;
• and
• wherein said nitrogen is incorporated in a concentration on the order of 2%.

A group III-V heterojunction bipolar transistor, comprising:

• collector, base, and emitter layers formed on a substrate in an arrangement defining a base-collector interface;
• base material forming said base layer;
• collector material forming said collector layer and having a wider bandgap than said base material;
• and
• nitrogen incorporated at the base-collector interface in an amount sufficient to reduce a conduction band energy of said collector layer at the base-collector interface to a conduction band energy of said base layer;
• and
• wherein said base and emitter layers comprise GaAs, and said collector layer comprises GaInPN having said nitrogen incorporation in said collector layer.