Laser-welded solid electrolytic capacitor

Details Laser-welded solid electrolytic capacitor Laser-welded solid electrolytic capacitor

2011-01-11

2011-01-11

Ghyka, Alexander G (Department: 2812)

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

Reexamination Certificate

active

07867291

ABSTRACT:
A solid electrolytic capacitor that is capable of withstanding laser welding without a significant deterioration in its electrical performance is provided. The capacitor contains an anode body, dielectric layer overlying the anode body, and a solid organic electrolyte layer overlying the dielectric layer. Furthermore, the capacitor of the present invention also employs a light reflective layer that overlies the solid organic electrolyte layer. The present inventors have discovered that such a light reflective layer may help reflect any light that inadvertently travels toward the capacitor element during laser welding. This results in reduced contact of the solid organic electrolyte with the laser and thus minimizes defects in the electrolyte that would have otherwise been formed by carbonization. The resultant laser-welded capacitor is therefore characterized by such performance characteristics as relatively low ESR and low leakage currents.

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UK Search Report for GB0814425.5 dated Nov. 18, 2008, 4 pages.

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