摘要:
A BGA semiconductor device includes a semiconductor package and a mounting board mounting thereon the semiconductor package, wherein an array of signal electrodes of the semiconductor package and an array of signal electrodes of the mounting board are coupled together via signal bumps. The BGA semiconductor device also includes a dummy bump, which reinforces the bending strength of the BGA semiconductor device and is broken by a shearing force caused by thermal expansion to alleviate the stress for the signal bumps.
摘要:
A semiconductor device capable of reducing a temperature increase during operation thereof is provided. In the semiconductor device, an interface chip is stacked on a plurality of stacked semiconductor elements. Both an “Si” interposer and a resin interposer are arranged under the plural semiconductor elements. The Si interposer is arranged between the resin interposer and the plural semiconductor elements. The Si interposer owns a thickness which is thicker than a thickness of a semiconductor element, and also has a linear expansion coefficient which is smaller than a linear expansion coefficient of the resin interposer, and further, is larger than, or equal to linear expansion coefficients of the plural semiconductor elements.
摘要:
A BGA semiconductor device includes a semiconductor package and a mounting board mounting thereon the semiconductor package, wherein an array of signal electrodes of the semiconductor package and an array of signal electrodes of the mounting board are coupled together via signal bumps. The BGA semiconductor device also includes a dummy bump, which reinforces the bending strength of the BGA semiconductor device and is broken by a shearing force caused by thermal expansion to alleviate the stress for the signal bumps.
摘要:
A semiconductor chip is mounted on a flexible wiring board through the interposition of an elastomer. The flexible wiring board is made up of a tape on which wiring is fixed. A part of the wiring is projected beyond the edge of the tape, extended in the direction of the thickness of the elastomer and connected to an electrode of the semiconductor chip. The edge of the tape beyond which the wiring is projected protrudes beyond the edge of the elastomer by a length no smaller than the thickness of the elastomer.
摘要:
A stacked type semiconductor device comprising: a baseboard having a terminal row formed at an end in which connecting terminals is arranged linearly and having a wiring pattern connected to the connecting terminals and external terminals; semiconductor chips having a pad row in which pads is arranged linearly in parallel to the terminal row and being stacked on the baseboard; and interposer boards having a wiring layer including a plurality of wires arranged in parallel with the same length for connecting between pads of the pad row and connecting terminals of the terminal row.
摘要:
A semiconductor chip is mounted on a flexible wiring board through the interposition of an elastmer. The flexible wiring board is made up of a tape on which wiring is fixed. A part of the wiring is projected beyond the edge of the tape, extended in the direction of the thickness of the elastmer and connected to an electrode of the semiconductor chip. The edge of the tape beyond which the wiring is projected protrudes beyond the edge of the elastmer by a length no smaller than the thickness of the elastmer.
摘要:
A semiconductor mechanical quantity measuring apparatus in which the reverse surface of a strain-detecting semiconductor element is bonded to an object of measurement, and a member having a small elastic modulus is interposed between the wiring board for supporting the strain-detecting semiconductor element and the strain-detecting semiconductor element. It then becomes possible to reduce an undesirable effect that the rigidity and thermal deformation of the wiring board have on the strain-detecting semiconductor element, while supporting the strain-detecting semiconductor element.
摘要:
A novel structure capable of reducing the stress in the insulating layer in the semiconductor element and thereby securing reliability is provided. When the semiconductor element and the substrate are connected with a solder, the stress generated in the insulating layer is reduced by placing a spherical core made of a material having a greater rigidity inside the solder and satisfying the following inequalities: 1 GPa
摘要:
The present invention includes a semiconductor element provided with an electrode passing through front and back sides. The electrode is formed as a cylinder including a hollow portion, and stress relaxing material is provided in the hollow portion, which is used to reduce stress that is induced between the semiconductor element and the electrode. The stress relaxing material is an elastic body made of resin material.
摘要:
A life prediction method of an electronic device in which the life prediction accuracy is more improved than that in a related art technique, and a design method of an electronic device based on the above method, are established. Life prediction is performed by incorporating either of a change in a physical property of a solder joint portion and a change in the fatigue life of a solder, the changes occurring when left at a high temperature. The change in a physical property of the solder joint portion or the change in the fatigue life of the solder is determined from the relationship between a heat treatment temperature and a heat treatment time. These changes are then formulated to be incorporated into the life prediction.