| 摘要 |
PURPOSE: To obtain an improved lead frame for insert molding a small object by providing a plurality of metallic leads and separating the leads from each other by means of a no-burr tab device used for minimizing the leakage of a molding material while the leads are molded. CONSTITUTION: An electronic package is provided with a plastic body section 1 and a plurality of leads 10 and the leads 10 and no-burr tabs 12 are separated from each other by dividing lines 16 which are produced when the tabs 12 are removed from a sheet material and inserted into a lead frame. The tabs 12 have raised sections 13 which are useful for two desirable purposes. The curved sections 13 of the tabs 12 reduce the oblique angular forces and inserting forces of leads when each tab 12 is stamped while the tab 12 is pulled from an adjacent lead. In addition, the raised sections 13 facilitate the removal of the tabs 12 during a trimming process by increasing the rigidity of the tabs 12 and, in addition, prevent the blowing out of a molding material during a molding process. Therefore, a lead frame strip can be formed without causing such an excessive stress that deforms the lead frame. |
