| 摘要 |
PURPOSE:To offer the titled package with leads which is suitable for visually inspect solder wetting after soldering, by providing leads with gaps. CONSTITUTION:The inner surface of a lead 2 is provided with a gap 3 in the longitudinal direction. When solder 6 deposited on a conductive pattern 5 dissolves, the solder becomes wet to the lead part 2 of the titled package with leads, and thereby the solder 6 wets the lead part 2 by a distance of about 0.5mm or 1mm off its contact surface with the conductive pattern 5. At this time, dissolved solder keeps on filling the gap 3 in the arrow direction by capillary action. In other words, in case of sufficient solder wetting, the gap 3 is filled with solder; therefore, solder wetting can be easily confirmed by visual inspection. |
