Abstract:
A semiconductor device includes a semiconductor element mounted on a substrate; at least one electronic part arranged around the semiconductor element; and a heat radiation member bonded to a backside of the semiconductor element by a bonding material. The heat radiation member has an isolation part extending between an outer circumference of the semiconductor element and the electronic part.
Abstract:
A circuit board has a low thermal expansion coefficient that suits the thermal expansion coefficient of an element to be mounted thereupon and can prevent the occurrence of delamination and cracking of a core layer when the circuit board is used in a low temperature environment. The circuit board is constructed by laminating a core layer and at least one wiring layer, where the at least one wiring layer has slightly smaller external dimensions in a planar direction than the core layer.
Abstract:
A manufacturing method for a substrate with a stiffener is disclosed, the substrate being capable of ensuring a good flatness of a printed board when heated to a high temperature and then cooled. The method comprises a first step of preparing a printed board and a stiffener, the printed board including a wiring part and an insulating part formed of an organic insulating material, and the stiffener being formed of a material with a smaller coefficient of thermal expansion than that of the material of the printed board, and a second step of bonding the printed board and the stiffener with a thermosetting adhesive. In the second step, a curing process temperature for curing the thermosetting adhesive is equal to or higher than the glass transition point of the organic insulating material.
Abstract:
A semiconductor device and a manufacturing method of the device are disclosed. The semiconductor device includes a substrate that mounts a semiconductor element, a first stiffener, a reinforcement resin member, and a second stiffener for reinforcing the reinforcement resin member.
Abstract:
The present invention provides a printed wiring board design aiding apparatus, method, and program that can easily and inexpensively predict the displacement of a printed wiring board of complicated shape and configuration due to temperature change. The printed wiring board design aiding program makes a computer execute the steps including a mesh division step that divides an analytical model of a printed wiring board obtained as data into meshes, a mesh displacement calculation step that calculates displacements of respective meshes of a printed wiring board which is divided in the mesh division step, a mesh displacement connection step that connects mesh displacements calculated in the mesh displacement calculation step so that the inclination of borders of respective meshes become equal, and a displacement calculation step that calculates a displacement using an entire displacement of a printed wiring board which is obtained in the mesh displacement connection step.
Abstract:
A manufacturing method of a layered board that includes a core layer that serves as a printed board, and a buildup layer that is electrically connected to said core layer, said buildup layer including an insulation-part and a wiring part includes the step of setting a coefficient of thermal expansion, a thickness and a modulus of longitudinal elasticity of each layer so that the layered board has a predetermined value of the coefficient of thermal expansion.
Abstract:
A manufacturing method of a layered board that includes a core layer that serves as a printed board, and a buildup layer that is electrically connected to said core layer, said buildup layer including an insulation part and a wiring part includes the step of setting a coefficient of thermal expansion, a thickness and a modulus of longitudinal elasticity of each layer so that the layered board has a predetermined value of the coefficient of thermal expansion.
Abstract:
According to a method of making a semiconductor device, a semiconductor chip is bonded to a substrate via bumps by flip-chip bonding. Then, a sealing adhesive composition is loaded between the semiconductor chip and the substrate to provide an adhesive sealing. The sealing adhesive composition, which is capable of hardening in two stages, contains at least a first main resin ingredient, a second main resin ingredient and a hardening agent. Then, the adhesive sealing is heated for primary hardening. Then, the substrate is placed on a mother board with a solder material interposed between the substrate and the mother board. Finally, the adhesive sealing is heated for secondary hardening while the solder material is reflowed for bonding the substrate to the mother board.