패러린 컨포멀코팅 적용을 통한 고집적 전자장치의 진동 영향 및 내구성 연구 = Study on Vibration Effects and Durability of Highly Integrated Electronic Devices through the Application of Parylene Conformal Coating

다국어 초록 (Multilingual Abstract)

Parylene coatings exhibit high mechanical strength. Therefore, we confirmed that the parylene coating has a positive effect on the reliability of electronic components mounted on PCBs (printed circuit boards) in a vibration environment.
This study used Daisy chains of ceramic column grid array (CCGA) components to test the vibration environment of three sets of coatings: one set without the parylene coating, one set with 15 µm parylene coating, and one set with 30 µm parylene coating. The first random vibration of the x-axis consisted of six stages that were evaluated for 5 min each, and there was no special matter in all samples. In the case of the z-axis random vibration, under 2 grms conditions, the response sensor was 12.22 grms, confirming an instantaneous excitation of up to 1,000 times. Even under 5 and 10 grms conditions, excitations of more than 1,000 times were confirmed at 20.39 and 44.02 grms, respectively. Because of the Daisy chain, all uncoated samples were open under 20 grms conditions, and there were no special matters for the 30-µm-coated sample. In the cross section after the vibration test, visible cracks were confirmed in the uncoated sample, but the 30-µm-coated sample had either micro or no cracks.
Consequently, it was experimentally verified that the uniform coating-film formation and parylene coating thickness were effective in relieving stress.