Quartz Crystal Hermeticity and the Relationship to SC-cut Long-Term Reliability

Precision quartz crystal resonators must operate reliably for many years, even under adverse conditions like temperature fluctuations and exposure to environmental contaminants. Quartz crystal resonators, particularly those with SC-cut designs, can suffer from performance issues such as frequency aging, increased resistance, and unstable phase noise if not adequately protected. To ensure long-term reliability, these crystals are sealed in hermetic packages that safeguard against moisture and other harmful elements. This white paper explores the importance of hermetic sealing in quartz crystal manufacturing, focusing on its critical role in maintaining the long-term stability and reliability of SC-cut crystals.