Heterojunction bipolar transistor

US4794440A · kind A · utility

Assignee

• American Telephone and Telegraph Company, AT&T Bell Laboratories · US

Inventors

• Federico Capasso · Westfield, US
• Arthur C. Gossard · Hackettstown, US
• John Hayes · Summit, US
• Roger Malik · Summit, US
• Pierre M. Petroff · Lompoc, US

Key dates

• Filing date: Dec 30, 1987
• Grant date: Dec 27, 1988
• Expiry date: Dec 30, 2007

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10D10/821

Abstract

A heterojunction bipolar transistor having means for changing carrier transport properties is described.