Suitable for factory inspection and quality control of various ceramic packaging bases
Group Standard T/CECA 49-2021 "Piezoelectric Device Ceramic Packaging Base for Frequency Control and Selection"
There are 7 inspection categories in total, and 12 inspection items cover all aspects of inspection such as appearance, size, and performance.
The current is effectively updated regularly to ensure compliance with the latest industry requirements
| Test category | Inspection item | Test methods | Judgment standard | Test basis/standard clause |
|---|---|---|---|---|
| Appearance | Appearance | Product inspection using a 10x microscope | According to "T/CECA49-2021 Ceramic Packaging Base for Piezoelectric Devices for Frequency Control and Selection" | Group Standard T/CECA 49-2021 6.2 Appearance Standard |
| Size | External dimension | Product size and tolerances comply with drawing requirements | Per the drawing | According to signed and approved technical drawings |
| Coating performance | Coating thickness | Test using X-fluorescence thickness gauge | Per the drawing | Per the drawing |
| Baking resistance | Place the bottom of the ceramic base downward in an oven at a temperature of 350±5℃ for 5± 0.5 minutes, and cool in air at room temperature | Observe under a 10x microscope, the surface of the bottom pad coating shall not appear mottled, foaming, peeling, etc. | Group Standard T/CECA 49-2021 6.3.2.2 Test Method | |
| Deposit adhesion | Use a test adhesive tape with an adhesive force greater than 1N/cm2 to adhere to the bottom pad of the ceramic packaging base for 10±1min, and then use a uniform force in the direction perpendicular to the bottom pad to peel the adhesive tape from the bottom pad. | Under bright light, use a 10x microscope to observe the solder pads and adhesive tape at the bottom of the ceramic packaging base. No coating fell off. | Group Standard T/CECA 49-2021 6.3.3.2 Test Method | |
| Salt spray test | 5% concentration of sodium chloride, spray time: 48h, temperature: 33℃, | The appearance shall not appear rust, blisters or discoloration | Group Standard T/CECA 49-2021 6.13.2 Test Method | |
| Electrical characteristics | Insulation resistance | Use insulation resistance measuring instrument, test T=24±2℃, measure voltage:DC(100±10)V t=5s | R≥1*10⁹Ω | Group Standard T/CECA 49-2021 6.4.2 Test Method |
| conduction performance | Use a multimeter or DC resistance meter to test | Per the drawing | Group Standard T/CECA 49-2021 6.4.2 Test Method | |
| Solderability of | Solder test | Soldering temperature (260±5)℃, dipping time (5±0.5) s | Bottom pad penetration area ≥95% | Group Standard T/CECA 49-2021 6.7.2 Test Method |
| Air tightness | Seal test | First seal the tested enclosure at the vacuum joint, then vacuum the enclosure cavity to 10Pa, and then use a spray gun to expose the exterior of the enclosure to a helium pressure of 236kPa. | Standard leakage rate ≤9*10 ³ (Pa.m³/s) | Group Standard T/CECA 49-2021 6.7.2 Test Method |
| Cover airtightness test | Use a roller welding machine to air-seal BASE and conduct helium leakage detection | Standard leakage rate ≤9*10 ³ (Pa.m³/s) | Group Standard T/CECA 49-2021 6.7.2 Test Method | |
| Exit strength | Pad tension | Use a copper wire with a diameter of 0.13mm to bond it to the metal pad, use a tension gauge to apply a tensile force to 1.47N in the direction perpendicular to the plane of the pad, and hold it for (10±1) s | The pads are not allowed to fall off, delaminate, crack or damage | Group Standard T/CECA 49-2021 6.11.2 Test Method |
