Patents Assigned to Matsushita Elecrtric Industrial Co., Ltd.
  • Patent number: 6861734
    Abstract: In a leadframe for an LGA package, a lead member is pressed downward to form a land lead with a half-cut portion and a land portion. The land portion, whose bottom will be a land electrode, is inclined at a predetermined angle and the bottom of the land portion is made lower than that of a lead. Thus, in a resin molding process using a seal sheet, the land electrode is forced into, and strongly adhered to, the seal sheet when pressure is applied through dies, and no resin encapsulant reaches the land electrode. As a result, no resin bur will be left on the land electrode of the land lead.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: March 1, 2005
    Assignee: Matsushita Elecrtric Industrial Co., Ltd.
    Inventors: Masanori Minamio, Osamu Adachi