Patent ID: 9628021
Date: 2017-04-18
CPC Classifications: H02H,H03B,H05K

Claim:
1. A crystal oscillation device, comprising: a wiring substrate having an obverse surface, a rear surface opposite the obverse surface, and a plurality of wiring patterns in the wiring substrate, the wiring patterns including a first wiring pattern, a second wiring pattern, a third wiring pattern, a fourth wiring pattern, and a fifth wiring pattern, the first, second, third, and fourth wiring patterns formed using an uppermost wiring layer of the wiring substrate, and the fifth wiring pattern formed using a wiring layer which is formed between the uppermost wiring layer and the rear surface; a semiconductor package having a side surface, first and second external terminals arranged along the side surface, and mounted on the obverse surface of the wiring substrate; a quartz crystal unit having a first side, first and second electrodes disposed along the first side, and mounted on the obverse surface of the wiring substrate such that the first side faces the side surface of the semiconductor package; and first and second capacitors mounted on the obverse surface of the wiring substrate and arranged in an area that is between the first and second wiring patterns and between the side surface of the semiconductor package and the first side of the quartz crystal unit in a plan view, wherein each of the first and second wiring patterns has a respective one end portion and a respective other end portion, and extends from the side surface of the semiconductor package to the first side of the quartz crystal unit respectively, wherein the one end portions of the first and second wiring patterns of the wiring substrate are electrically connected with the first and second external terminals of the semiconductor package respectively, wherein the other end portions of the first and second wiring patterns of the wiring substrate are electrically connected with the first and second electrodes of the quartz crystal unit respectively, wherein, in the plan view, the third wiring portion is also arranged in said area, wherein each of the first and second capacitors has a respective one end portion and a respective other end portion, wherein the one end portions of the first and second capacitors are electrically and mechanically connected with the first and second wiring patterns respectively, wherein the other end portions of the first and second capacitors are electrically and mechanically connected with the third wiring pattern, wherein, in the plan view, the fourth wiring pattern has: wherein the fourth wiring pattern at least partially surrounds the first, second, and third wiring patterns, the first and second capacitors, and the quartz crystal unit in the plan view, wherein the fifth wiring pattern overlaps with the first, second, third, and fourth wiring patterns, the first and second capacitors, and the quartz crystal unit in the plan view, and wherein, in a cross section view, the third wiring pattern is electrically connected with the fifth wiring pattern via a first through electrode.