VISUAL EXAMINATION METHOD OF ELECTRONIC COMPONENT

摘要

PROBLEM TO BE SOLVED: To provide a visual examination method of an electronic component capable of inspecting the joined state of a shielding lid member and a circuit mounted base in the electronic component provided with the shielding lid member.

SOLUTION: In the visual examination method of the electronic component composed of the component mounted base 2 and the metal lid member 3 which covers at least one side of the base 2 and is joined and held to the electrode 4 provided to the base 2 through solder 5, halation is produced by throwing light with a definite luminous intensity on the connection part 6 of the lid member 3 and the base 2 from its back to more darkly express the recessed part 20 between the lid member 3 and the base 2 than another part to detect a defective place.

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