The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 1982
Filed:
Jun. 20, 1980
Norman Braslau, Katonah, NY (US);
John L Freeouf, Cortlandt, NY (US);
George D Pettit, Mahopac, NY (US);
Hans S Rupprecht, Yorktown Heights, NY (US);
Jerry M Woodall, Bedford Hills, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A semiconductor device of the ballistic type, wherein the carrier transport in the body of the device from one electrode to the other takes place essentially free of collisions, is fabricated with a semiconductor body having a long mean-free path, a body width between ohmic electrodes that is less than or equal to the product of the velocity of a carrier and the time to a collision, but more than the distance that will permit quantum mechanical tunnelling, an impressed voltage less than required for an intervalley carrier transition and having the ohmic external contact on each surface of the body free of any barrier to carrier flow. A ballistic type triode device is provided with a current modulating electrode included within the body of the device. The triode device body is of n type conductivity gallium arsenide containing a zinc doped p type conductivity gallium arsenide current modulating inclusion in the body and having, as at least one ohmic external contact, a graded bandgap indium gallium arsenide region.