DA

David C. Ahlgren

IBM: 16 patents #6,952 of 70,183Top 10%
Overall (All Time): #301,295 of 4,157,543Top 8%
16
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7611953 Bipolar transistor with isolation and direct contacts Gregory G. Freeman, Francois Pagette, Christopher M. Schnabel, Anna W. Topol 2009-11-03
7585740 Fully silicided extrinsic base transistor Guy M. Cohen, Christian Lavoie, Francois Pagette, Anna W. Topol 2009-09-08
7466010 Bipolar transistor having self-aligned silicide and a self-aligned emitter contact border Gregory G. Freeman, Marwan H. Khater, Richard P. Volant 2008-12-16
7217988 Bipolar transistor with isolation and direct contacts Gregory G. Freeman, Francois Pagette, Christopher M. Schnabel, Anna W. Topol 2007-05-15
7129129 Vertical device with optimal trench shape Thomas N. Adam, Kangguo Cheng, Ramachandra Divakaruni 2006-10-31
6979884 Bipolar transistor having self-aligned silicide and a self-aligned emitter contact border Gregory G. Freeman, Marwan H. Khater, Richard P. Volant 2005-12-27
6881259 In-situ monitoring and control of germanium profile in silicon-germanium alloy films and temperature monitoring during deposition of silicon films Jack O. Chu, Basanth Jagannathan, Ryan Wuthrich 2005-04-19
6858532 Low defect pre-emitter and pre-base oxide etch for bipolar transistors and related tooling Wesley C. Natzle, Steven G. Barbee, Marc W. Cantell, Basanth Jagannathan, Louis D. Lanzerotti +2 more 2005-02-22
6780695 BiCMOS integration scheme with raised extrinsic base Huajie Chen, Seshadri Subbanna, Basanth Jagannathan, Gregory G. Freeman, David Angell +3 more 2004-08-24
6667521 Bipolar transistor with raised extrinsic base fabricated in an integrated BiCMOS circuit Gregory G. Freeman, Feng-Yi Huang, Adam D. Ticknor 2003-12-23
6492238 Bipolar transistor with raised extrinsic base fabricated in an integrated BiCMOS circuit Gregory G. Freeman, Feng-Yi Huang, Adam D. Ticknor 2002-12-10
5766971 Oxide strip that improves planarity Gary B. Bronner, Wesley C. Natzle, Erick G. Walton, Chienfan Yu 1998-06-16
5656514 Method for making heterojunction bipolar transistor with self-aligned retrograde emitter profile Jack O. Chu, Martin Revitz, Paul A. Ronsheim, Mary J. Saccamango, David Sunderland 1997-08-12
5266505 Image reversal process for self-aligned implants in planar epitaxial-base bipolar transistors Shao-fu Sanford Chu, Mary J. Saccamango, David Sunderland, Tze-Chiang Chen 1993-11-30
4701998 Method for fabricating a bipolar transistor Robert E. Bendernagel, Russell C. Lange, Martin Revitz 1987-10-27
4667395 Method for passivating an undercut in semiconductor device preparation William H. Ma, Martin Revitz 1987-05-26