Method of fabricating BGA packages
    74.
    发明授权
    Method of fabricating BGA packages 有权
    球栅阵列半导体封装的制作方法

    公开(公告)号:US06830957B2

    公开(公告)日:2004-12-14

    申请号:US10452488

    申请日:2003-05-30

    IPC分类号: H01L2144

    摘要: A method of fabricating BGA (Ball Grid Array) packages is proposed, which utilizes a specially-designed carrier to serve as an auxiliary tool to package semiconductor chips on substrates. The carrier is formed with a plurality of cavities respective for receiving a substrate and in communication with an injection gate, such that no injection gate is required on the substrate, thereby not restricting the trace routability on the substrate. Moreover, a two-piece type of mold is allowed being used to form a number of encapsulation bodies at one time, making the fabrication more productive and cost-effective. Furthermore, the proposed BGA fabrication method can be implemented without having to provide an air outlet in the substrate but allows the resulted encapsulation body to be free of voids to assure the quality of the packages. The proposed BGA fabrication method is therefore more advantageous to use than the prior art.

    摘要翻译: 提出了一种制造BGA(球栅阵列)封装的方法,该封装采用专门设计的载体作为将半导体芯片封装在衬底上的辅助工具。 载体形成有多个腔体,分别用于接收衬底并与注入栅极连通,使得在衬底上不需要注入栅极,从而不限制衬底上的迹线布线性。 此外,允许两件式的模具一次用于形成多个包封体,使得制造更加生产和成本有效。 此外,可以实现所提出的BGA制造方法,而不必在衬底中提供空气出口,但是允许所得到的封装体没有空隙以确保包装的质量。 因此,提出的BGA制造方法比现有技术更有利于使用。

    Method of fabricating a flip-chip ball-grid-array package with molded underfill
    77.
    发明授权
    Method of fabricating a flip-chip ball-grid-array package with molded underfill 有权
    制造具有模制底部填充物的倒装芯片球栅阵列封装的方法

    公开(公告)号:US06451625B1

    公开(公告)日:2002-09-17

    申请号:US09760440

    申请日:2001-01-13

    IPC分类号: H01L2144

    摘要: A method of fabricating a FCBGA (Flip-Chip Bal-Grid-Array) package with molded underfill is proposed, which is characterized by the forming of a mold-buffering opening in the solder mask at the exit of the vent hole in the substrate, wherein the mold-buffering opening is dimensioned to be greater in width than the inside diameter of the vent hole, so that during molding process when the encapsulation material infiltrates to the exit of the vent hole, it can be confined within the mold-buffering opening, thereby preventing it from flashing to nearby solder-ball pads. Since there would substantially exist no mold flash over the exposed surface of the solder mask and the solder-ball pads, the resulted FCBGA package would be assured in the quality of its outer appearance and the bonding between the solder-ball pads and the subsequently attached solder balls thereon.

    摘要翻译: 提出了一种制造具有模制底部填充物的FCBGA(倒装芯片平行栅格阵列)封装的方法,其特征在于在衬底中的通气孔的出口处在焊料掩模中形成模具缓冲开口, 其特征在于,所述模具缓冲口的尺寸设定为比所述通气孔的内径大的宽度,使得在所述密封材料渗透到所述通气孔的出口的成型工序中,所述密封材料可以被限制在所述模具缓冲开口 从而防止其闪烁到附近的焊球垫。 由于在焊接掩模和焊球垫的暴露表面上基本上不存在模具闪光,所以将确保所得到的FCBGA封装的外观质量和焊球垫与随后附着的粘合 焊球上。

    Method of bonding ball grid array package to circuit board without causing package collapse
    78.
    发明授权
    Method of bonding ball grid array package to circuit board without causing package collapse 有权
    将球栅阵列封装焊接到电路板而不会导致封装崩溃的方法

    公开(公告)号:US06350669B1

    公开(公告)日:2002-02-26

    申请号:US09699888

    申请日:2000-10-30

    IPC分类号: H01L2144

    摘要: A method is proposed for bonding a BGA (Ball Grid Array) package to a circuit board without causing the collapsing of the BGA package against the circuit board. The proposed method is characterized in the use of two groups of solder balls of different reflow collapse degrees, which are arranged in an interspersed manner among each other in the ball grid array. In one embodiment, the first group of solder balls are homogenously made of a solder material of a specific melting point; and the second group of solder balls each include an outer portion and a core portion, with the outer portion having substantially the same melting point as the first group of solder balls, and the core portion being greater in melting point than the outer portion. In another embodiment, the second group of solder balls are greater in melting point than the first group of solder balls. During the solder-reflow process, when the first group of solder balls are entirely melted, the second group of solder balls are only partly melted or entirely unmelted and thus are capable of providing a solid support to the BGA package to prevent the collapsing of BGA package against circuit board.

    摘要翻译: 提出了一种用于将BGA(球栅阵列)封装结合到电路板而不引起BGA封装相对于电路板折叠的方法。 所提出的方法的特征在于使用不同回流塌陷度的两组焊球,其在球栅阵列中以散布的方式相互排列。 在一个实施例中,第一组焊球由具有特定熔点的焊料均质地制成; 并且第二组焊球各自包括外部部分和芯部分,外部部分具有与第一组焊球基本相同的熔点,并且芯部分的熔点大于外部部分。 在另一个实施例中,第二组焊球的熔点高于第一组焊球。 在焊料回流工艺期间,当第一组焊球完全熔化时,第二组焊球仅部分熔化或完全未熔化,因此能够为BGA封装提供固体支撑以防止BGA的塌陷 封装电路板。