Trimmable composite multilayer capacitor and method

Details Trimmable composite multilayer capacitor and method Trimmable composite multilayer capacitor and method

1992-08-24

1994-09-13

Reynolds, Bruce A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

361271, 361303, 3613212, 29 2542, H01G 410

Patent

active

053474236

ABSTRACT:
In a first embodiment, a trimmable composite multilayer capacitor (10) is fabricated with a novel process so that the capacitor (10) exhibits a high quality factor Q and is capable of efficient and accurate functional trimming over a wide range while in a circuit. The capacitor (10) comprises a capacitor body (12) defined by a plurality of interleaved first and second electrodes (14, 16) spaced apart by dielectric material. The plurality establishes a fixed capacitance value. The plurality is co-fired at a first temperature. A trimmable outermost electrode (14') is disposed on the exterior of the capacitor body (12) and is capable of depletion for particularly selecting the overall capacitance value of the capacitor (10). The trimmable outermost electrode is sintered on the capacitor body (12) at a second temperature which is less than the first temperature. Finally, first and second terminations (24, 26) are positioned at the ends of the capacitor body (12). The first termination is connected to the first electrodes (14) and to the trimmable outermost electrode (14'), whereas the second termination is connected to the second electrodes (16). In a second embodiment, a trimmable outermost electrode is disposed as described above over the capacitor body (12) defined by the plurality of interleaved first and second electrodes (14, 16). Significantly, a solder barrier is situated externally over a portion of the trimmable outermost electrode (14') near the first termination to prevent solder from covering the trimmable outermost electrode.

REFERENCES:
patent: 3597579 (1971-08-01), Lumley
patent: 3921041 (1975-11-01), Stockman
patent: 4081901 (1978-04-01), Miller
patent: 4217570 (1980-08-01), Holmes
patent: 4288776 (1981-09-01), Holmes
patent: 4338506 (1982-07-01), Geller et al.
patent: 4371860 (1983-02-01), May et al.
patent: 4397886 (1983-08-01), Neirman et al.
patent: 4439814 (1984-03-01), Rhodes
patent: 4470096 (1984-09-01), Guertin
patent: 4731697 (1988-03-01), McLarney
patent: 4747014 (1988-05-01), Kaino et al.
patent: 4792779 (1988-12-01), Pond et al.
patent: 4905358 (1990-03-01), Einbinder
patent: 4924064 (1990-05-01), Stormbom et al.
patent: 4928838 (1990-05-01), Imamura
patent: 4990742 (1991-02-01), Nishikawa et al.
patent: 5055911 (1991-10-01), Orgata
patent: 5065275 (1991-11-01), Fujisaki et al.
patent: 5081439 (1992-01-01), Natzle et al.
patent: 5159524 (1992-10-01), Hasegawa et al.

Affiliated with

Also associated with

Rating

Trimmable composite multilayer capacitor and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Trimmable composite multilayer capacitor and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trimmable composite multilayer capacitor and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1124656