Quartz oscillating plate
A quartz oscillating plate comprises a substrate having a notch. Two sides of the notch respectively have a first side-electrode and a second side-electrode. The first side-electrode receives an external signal. The external signal is transmitted along the perimeter of the substrate. The notch of the substrate can increase the length of the transmission path of oscillation energy. The present invention can improve the Q value of the quartz oscillator using the quartz oscillating plate and optimize the performance of the products using the quartz oscillator.
1. A quartz oscillating plate comprising a substrate, a first side-electrode, a second side-electrode, a first surface electrode, and a first connection member, wherein said substrate has a notch along a lateral side of said substrate; said first and second side-electrodes are respectively disposed at two corners of a top side of said substrate with said notch sandwiched in between; said first surface electrode is disposed on said top side besides said first side-electrode, said notch, and said second side-electrode; said first connection member is disposed on said top side connecting said first surface electrode and said first side-electrode;
wherein said notch is surrounded by a first inner side, a third inner side opposing said first inner side, and a second inner side between said first and third inner sides; said notch defining a length of a transmission path which includes a summation of lengths of said first, said second, and said third inner sides, a first included angle between said first inner side and said second inner side is greater than 90 degrees and is smaller than 160 degrees; a second included angle between said second inner side and said third inner side is greater than 90 degrees and is smaller than 160 degrees;
wherein said notch has a depth of 10-160 μm corresponding to the first included angle and the second included angle;
whereby said transmission path is selectively chosen as a function of the lengths of said first inner side, second inner side and third inner side and said first and second included angles.
2. The quartz oscillating plate according to claim 1 , further comprising
a first protrudent platform disposed on said top side of said substrate;
wherein said first surface electrode is disposed on a top side of the said first protrudent platform.
3. The quartz oscillating plate according to claim 1 , further comprising
a third side-electrode and a fourth side-electrode respectively disposed at two corners of a bottom side of said substrate with said notch sandwiched in between and respectively corresponding to said first side-electrode and said second side-electrode;
a second surface electrode disposed on said bottom side besides said third side-electrode, said notch, and said fourth side-electrode and corresponding to said first surface electrode; and
a second connection member disposed on said bottom side connecting said second surface electrode and said fourth side-electrode.
4. The quartz oscillating plate according to claim 3 , further comprising
a second protrudent platform disposed on said bottom side of said substrate;
wherein said second surface electrode is disposed on a bottom side of the said second protrudent platform.
5. The quartz oscillating plate according to claim 1 , wherein said first included angle is equal to said second included angle.
6. The quartz oscillating plate according to claim 1 , further comprising two electric-conduction bumps respectively disposed beneath said substrate below said first side-electrode and said second side-electrode.