High quality factor, integrated inductor and production...

Active solid-state devices (e.g. – transistors – solid-state diode – Integrated circuit structure with electrically isolated... – Passive components in ics

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C257S522000, C257S528000

Reexamination Certificate

active

06437418

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a high quality factor, integrated inductor and a production method thereof.
BACKGROUND OF THE INVENTION
As is known, inductors are key components of the operating blocks of a radio-frequency circuit. Their critical parameters comprise the inductance value L, the quality factor Q, and the resonance frequency f. Many applications, such as GSM cellular communications systems, require inductors which have inductance L of 1-10 nH, a quality factor Q of at least 10, and a resonance frequency which is far greater than 1 GHz.
Integrated inductors made of aluminum, which have a quality factor Q of 3, can easily be produced by means of standard microelectronics processes. The quality factor Q is however limited by the parasitic capacitance towards the substrate, and by the resistance of the inductor itself. Consequently, it is not possible at present to produce integrated inductors of semiconductor material which have a high quality factor. For applications which have high requirements, discrete inductors external to the integrated silicon device are used.
SUMMARY OF THE INVENTION
An object of the invention is thus to provide an inductor which has a high quality factor.
The present invention provides a high quality factor integrated inductor and production method thereof. In one embodiment of the present invention, the integrated inductor comprises a coil of conductive material wherein said coil is supported by a bracket extending above and spaced from a semiconductor material body by an air gap. The bracket is carried by the semiconductor material body through support regions.
To enable the present invention to be understood, a preferred embodiment is now described, purely by way of non-limiting example, with reference to the attached drawings.


REFERENCES:
patent: 5450263 (1995-09-01), Desaigoudar et al.
patent: 5539241 (1996-07-01), Abidi et al.
patent: 5825092 (1998-10-01), Delgado et al.
patent: 6211056 (2001-04-01), Begley et al.
patent: 0413348 (1991-02-01), None
patent: 0812016 (1997-12-01), None
patent: WO 94/17558 (1994-08-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

High quality factor, integrated inductor and production... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High quality factor, integrated inductor and production..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High quality factor, integrated inductor and production... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2887277

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.