Test Item Test Method Mechanical Performance Tests: Leakage test Fine Leak: Should be less than 5x10-8 atmCC/secby holium leak detector. Gross Leak: Should be immersed in hot water(90±5℃)for 5 Minutes resulting no buble generated around it. Shock test Orient the sample in any attitude and drop it three times from a height of 50cm onto a hardwood board with a thickness of 3cm. Resistance to soldering heat Dip terminal in a 260±5℃ solder bath for 10±0.5 seconds The solder shell leave an undipped lead an undipped terminal length og 2mm at their base. Bending strength Apply a 500g load to one of the terminals, and after tilting the unit Resonator for 90°,restore to its original attitude. The tilt it in an opposite direction for 90° and restore to its original attitude. Lapping Precision Lapping To lap a quartz crystal to the extent of the prescribed thickness and frequency. Tensile strength After pasting together the thickness lapped quartz crystal, process them to the prescribed dimensions. Beveling Apply a 1.5kg tensile load to terminal and sustain it for 30±5 seconds. Environmental Tests: Storage In Low Temperature Expose the sample in an inoperative mode to 500 hours in a -40℃ Environment. Storage In High Temperature Expose the sample in an inoperative mode to 500 hours of a +85℃ Environment.