The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1999
Filed:
Sep. 05, 1997
Erik K Reed, Mauldin, SC (US);
Kemet Electronics Corp., Greenville, SC (US);
Abstract
Multielement capacitors have at least one metal capacitor and at least one ceramic capacitor with common terminals in a common case. The preferred metal capacitance elements have an effective series capacitance of at least 1 microfarad at frequencies of up to 100 kHz. The individual metallic capacitance elements exhibit an ESR of less than 100 milliohms at 100 kHz and a dissipation factor (DF) of less than about 6% at 120 Hz. The ceramic capacitance elements useful in the invention have an equivalent series capacitance of at least about 0.1 microfarads at frequencies of up to about 100 MHz. The individual ceramic capacitance elements have an ESR of less than 20 milliohms at 1 MHz and a dissipation factor of less than 10% at 1 kHz.