Abstract
The strength reliability to the drop impact is important in a mobile equipment, and the impact strength reliability is evaluated by drop impact test with the product. In drop impact test of the product, it is difficult to evaluate strength with good accuracy narrowed to the solder joint parts of specific parts. If the impact strength reliability is evaluated with one part, the reliability of the solder joint part of electronic parts is quickly forecast in designing the initial stage without the mechanism element of the case etc. In this report, the result that method of the steel ball's dropping on fixed printed wiring board and giving the impact from the outside is drop impact test equivalent method is introduced.
