Mounted body and method for manufacturing the same
First Claim
1. A method for manufacturing a mounted body, the method comprising the steps of:
- providing a solder resin paste between a multilayer semiconductor chip comprising a plurality of semiconductor chips that are stacked and a mounting board on which the multilayer semiconductor chip is mounted including areas where a solder bump is not to be formed, the solder resin paste containing a resin, a solder powder, and a convection additive that boils when heated; and
heating the solder resin paste so that motion of the boiling convection additive in the resin gives kinetic energy to solder particles dispersed in the resin to promote a movement of the solder particles, thus causing the solder powder to assemble to form the solder bump, whereby an element electrode of each semiconductor chip of the multilayer semiconductor chip and an electrode terminal formed on the mounting board so as to correspond to the element electrode are connected electrically to each other collectively.
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Accused Products
Abstract
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.
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Citations
13 Claims
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1. A method for manufacturing a mounted body, the method comprising the steps of:
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providing a solder resin paste between a multilayer semiconductor chip comprising a plurality of semiconductor chips that are stacked and a mounting board on which the multilayer semiconductor chip is mounted including areas where a solder bump is not to be formed, the solder resin paste containing a resin, a solder powder, and a convection additive that boils when heated; and heating the solder resin paste so that motion of the boiling convection additive in the resin gives kinetic energy to solder particles dispersed in the resin to promote a movement of the solder particles, thus causing the solder powder to assemble to form the solder bump, whereby an element electrode of each semiconductor chip of the multilayer semiconductor chip and an electrode terminal formed on the mounting board so as to correspond to the element electrode are connected electrically to each other collectively. - View Dependent Claims (2, 3, 7, 8, 11, 12)
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4. A method for manufacturing a mounted body, the method comprising the steps of:
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providing a solder resin paste between a first semiconductor chip and a mounting board on which the first semiconductor chip is mounted including areas where a first solder bump is not to be formed, the solder resin paste containing a resin, a solder powder, and a convection additive that boils when heated; heating the solder resin paste so that motion of the boiling convection additive in the resin gives kinetic energy to solder particles dispersed in the resin to promote a movement of the solder particles, thus causing the solder powder to assemble to form the first solder bump, whereby an element electrode of the first semiconductor chip and an electrode terminal formed on the mounting board so as to correspond to the element electrode are connected electrically to each other collectively; joining a second semiconductor chip having a principal surface to be joined to a rear surface of the first semiconductor chip and a second element electrode formed on the principal surface to the rear surface of the first semiconductor chip, and providing the solder resin paste between the mounting board and the second semiconductor chip including areas where a second solder bump is not to be formed; and heating the solder resin paste so that motion of the boiling convection additive in the resin gives kinetic energy to solder particles dispersed in the resin to promote a movement of the solder particles, thus causing the solder powder to assemble to form the second solder bump, whereby the element electrode of the second semiconductor chip and an electrode terminal formed on the mounting board so as to correspond to the element electrode are connected electrically to each other collectively. - View Dependent Claims (5, 6, 9, 10)
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13. A method for manufacturing a mounted body, the method comprising the steps of:
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providing a solder resin paste that simultaneously provides a resin for joining a semiconductor chip to a mounting board, and a solder powder for forming an electrical connection between the semiconductor chip and the mounting board between the multilayer semiconductor chip comprising a plurality of semiconductor chips that are stacked and a mounting board on which the multilayer semiconductor chip is mounted, the solder resin paste containing the resin, the solder powder, and a convection additive that boils when heated; and heating the solder resin paste so that motion of the boiling convection additive in the resin gives kinetic energy to solder particles dispersed in the resin to promote a movement of the solder particles, thus causing the solder powder to assemble to form a solder bump, whereby an element electrode of each semiconductor chip of the multilayer semiconductor chip and an electrode terminal formed on the mounting board so as to correspond to the element electrode are connected electrically to each other collectively.
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Specification