Inductor devices – Coil or coil turn supports or spacers – Printed circuit-type coil
Reexamination Certificate
2011-07-19
2011-07-19
Mai, Anh T (Department: 2832)
Inductor devices
Coil or coil turn supports or spacers
Printed circuit-type coil
C336S232000
Reexamination Certificate
active
07982571
ABSTRACT:
An inductance formed in a stack of insulating layers, the inductance comprising first and second access terminals and first and second half-loops distributed in the stack of insulating layers on a number of distinct levels greater than or equal to four. For each level, each first half-loop is at least partly symmetrical to one of the second half-loops. All the first half-loops are series-connected according to a first succession of first half-loops to form first loops between the first access terminal and a midpoint and all the second half-loops are series-connected according to a second succession of second half-loops to form second loops between the second output terminal and the midpoint.
REFERENCES:
patent: 6870457 (2005-03-01), Chen et al.
patent: 2004/0075521 (2004-04-01), Yu et al.
patent: 2004/0103522 (2004-06-01), Ahn et al.
Chen, W. et al. “Symmetric 3D Passive Components for RF ICs Application.”IEEE Radio Frequency Integrated Circuits Symposium, pp. 599-602; 2003.
French Search Report dated Feb. 27, 2008 from French Patent Application No. 07/56764.
Hinson Ronald W
Jorgenson Lisa K.
Mai Anh T
Morris James H.
STMicroelectronics S.A.
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