摘要:
There is provided a process for forming bumps wherein a plurality of fine bumps are uniformly formed with high productivity. In this process, a resin (13) comprising solder powder and a convection additive (12) is supplied onto a substrate (10) having a plurality of electrodes (11) thereon. And subsequently the substrate (10) is heated to a temperature that enables the solder powder to melt while keeping a flat plate (14) in contact with a surface of the supplied resin (13). During this heating step, the molten solder powder is allowed to self-assemble onto the electrodes (11) so that a plurality of solder balls resulting from the grown molten solder powder are concurrently formed on the electrodes (11) in self-alignment manner. Finally, by moving the flat plate (14) away from the surface of the supplied resin (13), followed by removing such resin (13), there is provided the substrate (10) wherein the bumps (16) are formed on the plurality of the electrodes.
摘要:
An electronic component mounting method includes a step of applying a resin composition (3) including solder powder, convective additive and resin having fluidity at the melting temperature of the solder powder on a main surface of a wiring substrate (1) provided with conductive wirings and connecting terminals, a step of preparing a group of electronic components consisting of a plurality of electronic components (7, 8 and 9) including at least a passive component, the respective electronic components comprising electrode terminals, position-aligning connecting terminals with the electrode terminals, and making the group of electronic components abut a surface of the resin composition, a step of heating at least the resin composition so as to melt solder powder and make the solder powder self-assembled between the connecting terminals and the electrode terminals by the convective additive, and thereby connecting the connecting terminals and the electrode terminals by soldering, and a step of fixedly adhering the group of electronic components to the wiring substrate using the resin by hardening the resin in the resin composition. Accordingly, a mounting process can be remarkably simplified without forming bumps in advance.
摘要:
A process for producing a flexible substrate comprising of a film, an insulating resin layer, and a wiring pattern, said process comprising the steps of: (a) preparing a sheet member comprising, (i) the film, (ii) the insulating resin layer formed on each of a front face of said film and a rear face of said film which face is opposite to said front face, and (iii) a front-sided wiring pattern embedded in said insulating resin layer formed on said front face of said film, and a rear-sided wiring pattern embedded in the insulating resin layer formed on said rear face of said film; and (b) pressing a part of at least one of said front-sided wiring pattern and said rear-sided wiring pattern into the inside of said sheet member so that a part of said front-sided wiring pattern and a part of said rear-sided wiring pattern are jointed to each other to form a junction.
摘要:
A mounted body of the present invention includes: a multilayer semiconductor chip 20 including a plurality of semiconductor chips 10 (10a, 10b) that are stacked; and a mounting board 13 on which the multilayer semiconductor chip 20 is mounted. In this mounted body, each of the semiconductor chips 10 (10a, 10b) in the multilayer semiconductor chip 20 has a plurality of element electrodes 12 (12a, 12b) on a chip surface 21 (21a, 21b) facing toward the mounting board 13. On the mounting board 13, electrode terminals 14 are formed so as to correspond to the plurality of element electrodes (12a, 12b), respectively, and the electrode terminals 14 of the mounting board and the element electrodes (12a, 12b) are connected electrically to each other via solder bump formed as a result of assembly of solder particles. With this configuration, a mounted body on which a stacked package is mounted can be manufactured easily.
摘要:
A mounted body of the present invention includes: a multilayer semiconductor chip 20 including a plurality of semiconductor chips 10 (10a, 10b) that are stacked; and a mounting board 13 on which the multilayer semiconductor chip 20 is mounted. In this mounted body, each of the semiconductor chips 10 (10a, 10b) in the multilayer semiconductor chip 20 has a plurality of element electrodes 12 (12a, 12b) on a chip surface 21 (21a, 21b) facing toward the mounting board 13. On the mounting board 13, electrode terminals 14 are formed so as to correspond to the plurality of element electrodes (12a, 12b), respectively, and the electrode terminals 14 of the mounting board and the element electrodes (12a, 12b) are connected electrically to each other via solder bump formed as a result of assembly of solder particles. With this configuration, a mounted body on which a stacked package is mounted can be manufactured easily.
摘要:
An electronic component mounting method includes a step of applying a resin composition (3) including solder powder, convective additive and resin having fluidity at the melting temperature of the solder powder on a main surface of a wiring substrate (1) provided with conductive wirings and connecting terminals, a step of preparing a group of electronic components consisting of a plurality of electronic components (7, 8 and 9) including at least a passive component, the respective electronic components comprising electrode terminals, position-aligning connecting terminals with the electrode terminals, and making the group of electronic components abut a surface of the resin composition, a step of heating at least the resin composition so as to melt solder powder and make the solder powder self-assembled between the connecting terminals and the electrode terminals by the convective additive, and thereby connecting the connecting terminals and the electrode terminals by soldering, and a step of fixedly adhering the group of electronic components to the wiring substrate using the resin by hardening the resin in the resin composition. Accordingly, a mounting process can be remarkably simplified without forming bumps in advance.
摘要:
A flip chip mounting process includes the steps of supplying a resin (13) containing solder powder and a convection additive (12) onto a wiring substrate (10) having a plurality of electrode terminals (II), then bringing a semiconductor chip (20) having a plurality of connecting terminals (11) into contact with a surface of the supplied resin (13), and then heating the wiring substrate (10) to a temperature that enables the solder powder to melt. The heating step is carried out at a temperature that is higher than the boiling point of the convection additive (12) to allow the boiling convection additive (12) to move within the resin (12). During this heating step, the melted solder powder is allowed to self-assemble into the region between each electrode terminal (11) of the wiring substrate (10) and each connecting terminal (21) of the semiconductor chip to form an electrical connection between each electrode terminal (11) and each connecting terminal (21).
摘要:
A flip chip mounting process includes the steps of supplying a resin (13) containing solder powder and a convection additive (12) onto a wiring substrate (10) having a plurality of electrode terminals (11), then bringing a semiconductor chip (20) having a plurality of connecting terminals (11) into contact with a surface of the supplied resin (13), and then heating the wiring substrate (10) to a temperature that enables the solder powder to melt. The heating step is carried out at a temperature that is higher than the boiling point of the convection additive (12) to allow the boiling convection additive (12) to move within the resin (12). During this heating step, the melted solder powder is allowed to self-assemble into the region between each electrode terminal (11) of the wiring substrate (10) and each connecting terminal (21) of the semiconductor chip to form an electrical connection between each electrode terminal (11) and each connecting terminal (21). Finally, the resin is cured so as to secure the semiconductor chip (20) to the wiring substrate (10).
摘要:
A flip chip mounting process includes the steps of supplying a resin (13) containing solder powder and a convection additive (12) onto a wiring substrate (10) having a plurality of electrode terminals (11), then bringing a semiconductor chip (20) having a plurality of connecting terminals (11) into contact with a surface of the supplied resin (13), and then heating the wiring substrate (10) to a temperature that enables the solder powder to melt. The heating step is carried out at a temperature that is higher than the boiling point of the convection additive (12) to allow the boiling convection additive (12) to move within the resin (12). During this heating step, the melted solder powder is allowed to self-assemble into the region between each electrode terminal (11) of the wiring substrate (10) and each connecting terminal (21) of the semiconductor chip to form an electrical connection between each electrode terminal (11) and each connecting terminal (21). Finally, the resin is cured so as to secure the semiconductor chip (20) to the wiring substrate (10).
摘要:
A connection member can be produced without a via-forming step. The connection member includes an insulating substrate which has an upper surface, a lower surface opposed to the upper surface, and a side surface which connects these surfaces; and at least one wiring which extends from the upper surface to the lower surface through the side surface.