Twelve reasons for crystal oscillator damage
Crystal oscillators, also known as quartz crystals or crystal oscillators, are generally packaged in metal shells, but they can also be packaged in glass shells, ceramics, or plastics. The crystal oscillator has a small volume and the crystal oscillator chip is relatively thin. Any slight carelessness during transportation can cause damage to the crystal oscillator. Of course, there are other factors that cannot be ruled out, such as falling to the ground, or being knocked or hit. Let's take a look at the specific causes of crystal oscillator damage together.
Twelve reasons for crystal oscillator damage
1. Huge impact: There is a phenomenon of decline in the production process, and only crystals are subjected to external huge impacts. Crystal oscillator chips are relatively thin, so they need to be handled with care.
2. Excessive excitation power: The chip itself is thin, and if the excitation power is too high, the internal quartz chip may be damaged, causing it to come to a standstill.
3. False welding: During the welding process, virtual welding will occur, which prevents the crystal oscillator from being powered on.
4. Welding temperature is too high: Crystals are prone to mechanical and thermal stress when cutting legs and soldering tin. In theory, crystals have strong high-temperature resistance, with temperatures ranging from hundreds to thousands of degrees without any problems. However, the two sides of the crystal oscillator are welded to the connector after silver plating. Therefore, if the soldering temperature is too high and the action time is too long, it will affect the crystal, making it easy for the crystal to be in a critical state. When vibration occurs, there will be a phenomenon of stagnation or even stopping.
5. Connection circuit: Short circuit phenomenon caused by crystal oscillator welding.
6. Leakage inspection: During the leakage inspection process, under the pressure of alcohol, the quartz crystal resonator is prone to shell phenomenon. That is to say, during vibration, the chip is easily in contact with the casing, so the crystal is prone to vibration or stopping vibration when it occurs.
7. Poor sealing: During storage, the interior of the crystal requires vacuum nitrogen filling. If there is poor pressure sealing, that is, poor sealing of the crystal, under the condition of alcohol pressure, it will display as air leakage, which is called double leakage and will cause stopping.
8. Frequency Shift Supercrystal Deviation Range: When the crystal frequency shifts beyond the quartz crystal deviation range, the center frequency of the crystal will not be captured, and the chip will not vibrate.
9. Functional load reduction Q value: The functional load reduction Q value (i.e. quality factor) reduces the stability of the crystal, making it susceptible to the influence of surrounding active components and causing it to become sluggish when in an unstable state.
10. Pin to shell connection: When soldering tin, if the tin wire penetrates through small holes on the circuit board, connecting the pins to the shell, or if there is a single leakage between the crystal and the tin point on the base and the shell connection during the manufacturing process, a short circuit may occur, causing a pause.
11. Radiation damage: Strong radiation such as X-rays and cosmic rays may cause damage to the quartz lattice, resulting in crystal damage. If it is to be used in fields such as military and aerospace that are more concerned about radiation, it is recommended to use SC cut quartz chips (commonly AT cut), and even add necessary shielding measures.
12. Strong oscillation signal: If the oscillation excitation signal is too strong, it is highly likely to cause crystal damage, which can be called overload.
Therefore, crystal oscillator manufacturers need to pay special attention during transportation or use to avoid damage to the crystal oscillator and unnecessary losses. When storing, avoid environments that are damp, exposed to direct sunlight, excessively high or low temperatures, as well as environments with static electricity and radiation.
If your company has any relevant needs, please feel free to contact us for inquiries!
Email: wtl017@wtlcrystals.com
Phone: 0755-8267758213226851821 (Mr. Huang)
