Method of manufacturing a chip size package
    4.
    发明授权
    Method of manufacturing a chip size package 有权
    制造芯片尺寸封装的方法

    公开(公告)号:US06656758B1

    公开(公告)日:2003-12-02

    申请号:US09684604

    申请日:2000-10-06

    Abstract: First, a passivation film 3 having an opening K from which a part of the Al electrode 1 formed through an interlayer insulating film 2 made of a BPSG film is exposed is formed on a wafer. A wiring layer 7, which is connected to the Al electrode 1 exposed from the opening K and extended to the upper surface of the wafer, is formed. After a metal post 8 is formed on the wiring layer 7, a first groove TC1, which is located on the periphery of the chip inclusive of the wiring layer 7 and half cuts the wafer, is formed. The upper portion of the interlayer insulating film 2 is isotropically etched through the first groove TC1 to form a second groove TC2 having a larger opening diameter than that of the first groove TC1. The wafer surface inclusive of the wiring layer 7, second groove TC2 and first groove TC1 is resin-sealed to form an insulating resin layer R. Thereafter, a solder ball 12 is formed on the metal post 8 exposed from the insulating resin layer R. Finally, the wafer is fully cut through the insulating resin layer R formed in the first and the second grooves TC1 and TC2.

    Abstract translation: 首先,在晶片上形成具有通过由BPSG膜构成的层间绝缘膜2而形成的Al电极1的一部分露出的开口K的钝化膜3。 形成与从开口K露出并延伸到晶片的上表面的Al电极1连接的布线层7。 在布线层7上形成金属柱8之后,形成位于包括布线层7在内的芯片周边的第一沟槽TC1,并切割半晶片。 层间绝缘膜2的上部通过第一沟槽TC1进行各向同性蚀刻,以形成具有比第一沟槽TC1的开口直径大的开口直径的第二沟槽TC2。 包括布线层7,第二沟槽TC2和第一沟槽TC1的晶片表面被树脂密封以形成绝缘树脂层R.之后,在暴露于绝缘树脂层R的金属柱8上形成焊球12。 最后,通过形成在第一和第二槽TC1和TC2中的绝缘树脂层R,完全切割晶片。

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