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:
Dec. 21, 2004
Filed:
Mar. 06, 2003
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
A surface-mount crystal oscillator includes a crystal unit housing and an element housing which is provided on the base side of the crystal unit housing. A crystal blank is accommodated and hermetically sealed in the crystal unit housing. A concavity having an open side is formed in the element housing, and an IC chip is secured to the bottom surface of the concavity by means of face-down bonding. Notch portions or recess portions which are adjoining and connecting to the concavity and which are used for injecting fluid resin are formed in the frame portion at the periphery of the concavity. Fluid resin is injected to the bottom surface of the concavity by way of the notch portions and cured to form a protective resin layer of the IC chip.