Ki C Han

US Patent:

8352232, Jan 8, 2013

Filed:

Oct 22, 2008

Appl. No.:

12/288616

Inventors:

Ki Jin Han - Atlanta GA, US
Madhavan Swaminathan - Marietta GA, US

Assignee:

Georgia Tech Research Corporation - Atlanta GA

International Classification:

G06F 17/50
G06F 9/455

US Classification:

703 14, 703 13, 716100, 716106

Abstract:

Disclosed are apparatus, methods and software that implement a partial element equivalent circuit (PEEC) method having global basis functions on cylindrical coordinates to determine wide-band resistance, inductance, capacitance, and conductance from a large number of three-dimensional interconnections in order to provide for the electrical design of system-in-package (SIP) modules, and the like. The apparatus, methods and software use a modal equivalent network from mixed potential integral equation with cylindrical conduction and accumulation mode basis functions, which reduces the matrix size for large three-dimensional interconnection problems. Combined with these modal basis functions, the mixed potential integral equations describe arbitrary skin and proximity effects, and allow determination of partial impedance and admittance values. Additional enhancement schemes further reduces the cost for computing the partial inductances. Therefore, the apparatus, methods and software can be used to construct accurate models of a large number of three-dimensional interconnection structures, including more than 100 bonding wires used for stacking integrated circuit chips, through-silicon via interconnections, and the like.

US Patent:

20050274650, Dec 15, 2005

Filed:

Jun 2, 2005

Appl. No.:

11/143522

Inventors:

A. Frazier - Mableton GA, US
Ki Han - Smyrna GA, US

International Classification:

B03C001/30

US Classification:

209039000

Abstract:

Single stage and cascaded stage magnetophoretic microseparators are disclosed that efficiently separate blood cells from whole blood based on their native magnetic properties using a high gradient magnetic field without the use of additives such as magnetic tagging or fluorescent dyes. The microseparators are fabricated using microfabrication methods, enabling integration of micro-scale magnetic flux concentrators in an aqueous microenvironment, providing strong magnetic forces, and fast separations.