Patent ID: 8558627
Filing Date: 2013-10-15
Classification: H03H

Abstract:
1. A surface mount crystal oscillator, wherein: through holes are formed at four corners of a substrate on which a crystal blank is mounted; through terminals for causing inner surfaces of the through holes to be conductive are formed; corner terminals are formed around the through holes so as to surround the through holes and connected to the through terminals; on the substrate on which the crystal blank is mounted, a first crystal holding terminal is formed parallel to a short side of the substrate and a second crystal holding terminal is formed parallel to another short side of the substrate; one end of the first crystal holding terminal is led toward its nearest corner and connected to a corner terminal at the corner, and another end of the first crystal holding terminal is formed from a center of the short side to be shorter than the one end so as to form an area in which no pattern is formed; one end of the second crystal holding terminal is led toward its nearest corner and connected to a corner terminal at the corner, and another end of the second crystal holding terminal is formed from a center of the short side to be shorter than the one end so as to form an area in which no pattern is formed; on a rear surface of the substrate, ground terminals are formed not to overlap with the first crystal holding terminal and the second crystal holding terminal; and the corner terminal to which the first crystal holding terminal is connected and the corner terminal to which the second crystal holding terminal is connected are provided at opposite corners of the substrate.