CRYSTAL OSCILLATOR PRODUCTION PROCESS
Precision Manufacturing for Reliable Frequency Control
At JWT Crystal, every crystal oscillator is manufactured through a strict and controlled process to ensure high performance, stability and reliability.
1
WAFER LOADING
Quartz wafers are precisely aligned and loaded into fixtures (jigs) to prepare for metallization.
Key Point
Accurate alignment ensures consistent performance.
2
CLEANING
Wafers are cleaned in multi-stage ultrasonic baths to remove contaminants and ensure a clean surface.
Key Point
High-purity cleaning guarantees excellent electrode adhesion.
3
METALLIZATION
Metal films (Ag/Au) are deposited on the wafer surface by evaporation or sputtering to form electrodes.
Key Point
Film thickness is precisely controlled for target frequency.
4
SILVER CONDUCTIVE ADHESIVE DISPENSING
Silver conductive adhesive is dispensed to secure the wafer onto the ceramic base.
Key Point
Adhesive quality and positioning affect electrical performance.
5
FREQUENCY TRIMMING
Frequency is fine-tuned by etching or deposition to meet the target specification.
Key Point
Precision trimming ensures the required frequency accuracy.
6
HERMETIC SEALING
The base and metal cover are hermetically sealed by resistance welding or seam welding in a controlled atmosphere.
Key Point
Hermetic sealing ensures high reliability and low leakage rate.
7
AGING
Products are aged at elevated temperature to release stress and improve long-term stability.
Key Point
Proper aging improves frequency stability and product lifespan.
8
REFLOW SOLDERING
Reflow soldering simulates customer soldering conditions to ensure solder joint reliability.
Key Point
Controlled reflow profile ensures strong and reliable soldering.
9
LEAK & INSULATION TESTING
Leakage and insulation tests ensure hermeticity and electrical insulation performance.
Key Point
Strict testing guarantees high reliability and low failure rate.
10
FINAL TEST & PACKAGING
Electrical parameters are fully tested, laser marked and packaged for shipment.
Key Point
100% testing ensures consistent quality before delivery.