Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Reexamination Certificate
2005-06-07
2005-06-07
Reichard, Dean A. (Department: 2831)
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
C301S064600, C301S064600, C301S064600, C301S064600, C301S064600
Reexamination Certificate
active
06903920
ABSTRACT:
A ceramic capacitor with a low-profile leadframe. The ceramic capacitor comprises a multiplicity of parallel plates in planar relationship. Each plate terminates at opposing faces in an alternating pattern. A dielectric is between the parallel plates. Two external terminations are on opposing sides of the capacitor wherein each external termination is in electrical contact with alternating plates of the multiplicity of parallel plates. The bottom half of the ceramic capacitor including the external terminations is treated with an insulative coating prior to attachment to a leadframe. The noninsulated portions of the terminations are attached to the leadframe and the insulator prevents the leadframe from attaching to the lower vertical faces of the terminations. The leadframe in this manner creates no excessive distance between the chip and the PCB surface, thus reducing inductance and resistance.
REFERENCES:
patent: 5805409 (1998-09-01), Takahara et al.
patent: 5812363 (1998-09-01), Kuroda et al.
patent: 6205015 (2001-03-01), Wada et al.
patent: 6380619 (2002-04-01), Ahiko et al.
patent: 6381118 (2002-04-01), Yokoyama et al.
patent: 6556423 (2003-04-01), Konaka et al.
Ha Nguyen T.
Kemet Electronics
Nexsen Pruet , LLC
O'Toole J. Herbert
Reichard Dean A.
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