Inductor devices – Coil or coil turn supports or spacers – Printed circuit-type coil
Patent
1998-02-03
1999-09-28
Gellner, Michael L.
Inductor devices
Coil or coil turn supports or spacers
Printed circuit-type coil
336223, 336 84M, H01F 500, H01F 2728
Patent
active
059595221
ABSTRACT:
An integrated electromagnetic device (112) provides increased inductance in a smaller area on a semiconductor substrate (130). A conduction path (140) is disposed on the substrate for developing the inductance. A first magnetic shield (142) is disposed between the substrate and the conduction path to concentrate the magnetic flux induced by current flowing along the conduction path, which increases the inductance. Inductance is further increased by shielding the magnetic flux from the substrate with the first magnetic shield, which reduces substrate eddy currents that oppose the applied current. A second magnetic shield (144) overlaying the conduction path is coupled to the first magnetic shield, further concentrating the magnetic flux and increasing the inductance.
REFERENCES:
patent: 3614554 (1971-10-01), Richardson et al.
patent: 5227659 (1993-07-01), Hubbard
patent: 5345194 (1994-09-01), Nagasako
patent: 5396101 (1995-03-01), Shiga
patent: 5583474 (1996-12-01), Mizoguchi et al.
patent: 5635892 (1997-06-01), Ashby et al.
patent: 5717249 (1998-02-01), Yoshikawa et al.
patent: 5861336 (1999-01-01), Rddey et al.
C. P. Yue et al., "On-Chip Spiral Inductors with Patterned Ground Shields for Si-Based RF IC's", Symposium on VLSI Circuits Digest of Technical Papers, Jun. 1997, pp. 85-86.
J. Craninckx; A 1.8-GHz Low-Phase-Noise CMOS VCO Using Optimized Hollow Spiral Inductors; IEEE Journal of Solid State Circuits, vol. 32, No. 5, May 1997, pp. 736-744.
Gellner Michael L.
Hightower Robert F.
Mai Anh
Motorola Inc.
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