摘要:
Exemplary embodiments of the selective laser repair apparatus and method may allow the repair of metal bumps in a semiconductor device stack by applying a laser beam to a damaged and/or defective bump. Metal bumps may be repaired and individual chips and/or packages forming a device stack need not be separated. The operation of a control unit and a driving unit may position a laser unit such that a laser beam may be irradiated at the damaged and/or defective metal bump. An X-ray inspection unit may obtain information about the damaged and/or defective metal bump.
摘要:
A method of forming a solder bump may involve forming a first photoresist pattern on a wafer having a pad. The first photoresist pattern may have an opening that exposes a portion of the pad. A first under bump metallurgy (UBM) layer may be formed on the pad, and a second UBM layer may be formed on the first photoresist pattern. A second photoresist pattern may be formed that exposes the first UBM layer. A solder bump may be formed in the opening. The second photoresist pattern and the first photoresist pattern may be removed using a stripper, thereby removing the second UBM layer by a lift-off method.
摘要:
Provided is a method for manufacturing WLCSP devices that includes preparing at least two wafers, each wafer having a plurality of corresponding semiconductor chips, each semiconductor chip having through electrodes formed in the peripheral surface region, forming or applying a solid adhesive region to a central surface region, stacking a plurality of wafers and attaching corresponding chips provided on adjacent wafers with the solid adhesive region and connecting corresponding through electrodes of adjacent semiconductor chips, dividing the stacked wafers into individual chip stack packages, and injecting a liquid adhesive into a space remaining between adjacent semiconductor chips incorporated in the resulting chip stack package. By reducing the likelihood of void regions between adjacent semiconductor chips, it is expected that a method according to the exemplary embodiments of the present invention exhibit improved mechanical stability and reliability.
摘要:
Provided is a method for manufacturing WLCSP devices that includes preparing at least two wafers, each wafer having a plurality of corresponding semiconductor chips, each semiconductor chip having through electrodes formed in the peripheral surface region, forming or applying a solid adhesive region to a central surface region, stacking a plurality of wafers and attaching corresponding chips provided on adjacent wafers with the solid adhesive region and connecting corresponding through electrodes of adjacent semiconductor chips, dividing the stacked wafers into individual chip stack packages, and injecting a liquid adhesive into a space remaining between adjacent semiconductor chips incorporated in the resulting chip stack package. By reducing the likelihood of void regions between adjacent semiconductor chips, it is expected that a method according to the exemplary embodiments of the present invention exhibit improved mechanical stability and reliability.
摘要:
A method of fabricating wafer level chip scale packages may involve forming a hole to penetrate through a chip pad of an IC chip. A base metal layer may be formed on a first face of a wafer to cover inner surfaces of the hole. An electrode metal layer may fill the hole and rise over the chip pad. A second face of the wafer may be grinded such that the electrode metal layer in the hole may be exposed through the second face. By electroplating, a plated bump may be formed on the electrode metal layer exposed through the second face. The base metal layer may be selectively removed to isolate adjacent electrode metal layers. The wafer may be sawed along scribe lanes to separate individual packages from the wafer.
摘要:
Exemplary embodiments of the selective laser repair apparatus and method may allow the repair of metal bumps in a semiconductor device stack by applying a laser beam to a damaged and/or defective bump. Metal bumps may be repaired and individual chips and/or packages forming a device stack need not be separated. The operation of a control unit and a driving unit may position a laser unit such that a laser beam may be irradiated at the damaged and/or defective metal bump. An X-ray inspection unit may obtain information about the damaged and/or defective metal bump.
摘要:
Provided is a chip stack package that may include a lower semiconductor chip, an upper semiconductor chip stacked on the lower semiconductor chip, and at least one adhesive formed in space between the lower semiconductor chip and the upper semiconductor chip. The at least one adhesive may include a first adhesive and a second adhesive. The first adhesive may be formed in a portion of the space, and the second adhesive may be formed in the space except for a region in which the first adhesive is provided. The space between adjacent semiconductor chips may be completely filled with the at least one adhesive. Therefore, a chip stack package according to the exemplary embodiments of the present invention may exhibit improved mechanical stability and reliability.
摘要:
The chip package includes a first and second semiconductor chip. The first semiconductor chip has a first connection structure that electrically connects to a bond pad on a first surface of the first semiconductor chip. The second semiconductor chip has a second connection structure. The second connection structure is electrically connected to a bond pad on a first surface of the second semiconductor chip and extends through the second semiconductor chip to a second surface of the second semiconductor chip. A portion of the second connection structure extending to the second surface of the second semiconductor chip is electrically connected to the first connection structure and formed of a harder material than the first connection structure.
摘要:
A method of forming a solder bump may involve forming a first photoresist pattern on a wafer having a pad. The first photoresist pattern may have an opening that exposes a portion of the pad. A first under bump metallurgy (UBM) layer may be formed on the pad, and a second UBM layer may be formed on the first photoresist pattern. A second photoresist pattern may be formed that exposes the first UBM layer and covers the second UBM layer. A solder bump may be formed in the opening. The second photoresist pattern and the first photoresist pattern may be removed using a stripper, thereby removing the second UBM layer by a lift-off method.
摘要:
A method of fabricating wafer level chip scale packages may involve forming a hole to penetrate through a chip pad of an IC chip. A base metal layer may be formed on a first face of a wafer to cover inner surfaces of the hole. An electrode metal layer may fill the hole and rise over the chip pad. A second face of the wafer may be grinded such that the electrode metal layer in the hole may be exposed through the second face. By electroplating, a plated bump may be formed on the electrode metal layer exposed through the second face. The base metal layer may be selectively removed to isolate adjacent electrode metal layers. The wafer may be sawed along scribe lanes to separate individual packages from the wafer.