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:
Jan. 04, 2000
Filed:
Mar. 30, 1998
Masao Gamo, Takaoka, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A chip type filter reduces a required mount space while facilitating achievement of impedance matching and also enhancing the stability of filter characteristics. The chip type filter includes a first piezoelectric substrate, a filter section with resonance electrodes, a common electrode and a coupling capacitance section, a second piezoelectric substrate, a second filter section with a pair of resonance electrodes, a common electrode opposing the electrodes in a 'top/bottom-surface overlap' relationship and a coupling capacitance section. The filter is arranged such that the first and second piezoelectric substrates are adhered to each other with an adhesive layer located therebetween.