ASYMMETRIC SILICON-ON-INSULATOR (SOI) JUNCTION FIELD EFFECT TRANSISTOR (JFET), A METHOD OF FORMING THE ASYMMETRICAL SOI JFET, AND A DESIGN STRUCTURE FOR THE ASYMMETRICAL SOI JFET

• Main Authors: HERSHBERGER DOUGLAS B, ZIERAK MICHAEL J, ST. ONGE STEPHEN A, RASSEL ROBERT M, PHELPS RICHARD A
• Format: Patent
• Language: English
• Published: 24.11.2011
• Subjects: BASIC ELECTRIC ELEMENTS; CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; PHYSICS; SEMICONDUCTOR DEVICES

An asymmetric silicon-on-insulator (SOI) junction field effect transistor (JFET) and a method. The JFET includes a bottom gate on an insulator layer, a channel region on the bottom gate and, on the channel region, source/drain regions and a top gate between the source/drain regions. STIs isolate the source/drain regions from the top gate and a DTI laterally surrounds the JFET to isolate it from other devices. Non-annular well(s) are positioned adjacent to the channel region and bottom gate (e.g., a well having the same conductivity type as the top and bottom gates can be connected to the top gate and can extend down to the insulator layer, forming a gate contact on only a portion of the channel region, and/or another well having the same conductivity type as the channel and source/drain regions can extend from the source region to the insulator layer, forming a source-to-channel strap).