Surface package type semiconductor package and method of producing semiconductor memory

    公开(公告)号:US06443298B1

    公开(公告)日:2002-09-03

    申请号:US09843937

    申请日:2001-04-30

    IPC分类号: B65D7302

    摘要: In surface packaging of thin resin packages such as surface mount resin molded memory ICs or the like, cracks of the package occur frequently at a solder reflow step where thermal impact is applied to the package because the resin has absorbed moisture before packaging. To solve this problem, the devices are sealed, by heat-sealing, in a bag moisture-tight at an assembly step of the resin molded devices where the resin is still dry, and are taken out from the bags immediately before the execution of surface packaging. The devices are packaged in a moisture-proofing bag made of a laminate film, and a desiccant is sealed, by heat-sealing the bag, in the moisture-proofing bag together with the, e.g., surface mount semiconductor device having a plastic package encapsulating the semiconductor device. A caution is provided for the bag, that the devices should be presented from moisture absorption after opening the bag.

    Semiconductor device having lead on chip structure
    6.
    发明授权
    Semiconductor device having lead on chip structure 失效
    具有芯片结构的半导体器件

    公开(公告)号:US6002167A

    公开(公告)日:1999-12-14

    申请号:US710658

    申请日:1996-09-20

    摘要: A semiconductor device has a semi-conductor chip 1 having bonding pads 2 thereon, conductive leads 4, each of which comprises an inner lead 41 and an outer lead 42, insulating adhesive tapes 3 by which each of the inner leads 41 of the leads 4 is stuck to the surface 1a of the semiconductor chip 1, bonding wires 6 by which each of the leads 4 is electrically connected to each corresponding bonding pad 2. The semiconductor chip 1, bonding pad 2, adhesive tapes 3, inner leads 41, and bonding wires 6 are molded by a molding resin 5. The boundary of the inner lead 41 and the cuter lead 42 of the lead 4 is bent in S-shape so that there is a step between inner lead 41 and the upper side portion 42a of the outer lead 42 in a certain depth. Then the outer lead 42 protrude out of the molding resin and extend in J-shape. The surface 4a of the upper side portion 42a of the outer lead 42 is higher than the top of the looped bonding wire 6.

    摘要翻译: 半导体器件具有在其上具有接合焊盘2的半导体芯片1,导电引线4,每个导体4包括内引线41和外引线42,绝缘胶带3,引线4的每个内引线41 粘附到半导体芯片1的表面1a,每个引线4与每个相应的焊盘2电连接的接合线6.半导体芯片1,焊盘2,胶带3,内引线41和 接合线6由模制树脂5模制。引线4的内引线41和切割引线42的边界被弯曲成S形,使得在内引线41和上侧部分42a之间形成一个台阶 外引线42在一定深度。 然后,外引线42突出成型树脂,并以J形延伸。 外引线42的上侧部分42a的表面4a高于环状接合线6的顶部。