LSI package, LSI element testing method, and semiconductor device manufacturing method
First Claim
1. An LSI package comprising:
- at least one LSI element having a plurality of pin terminals; and
a wiring board having a plurality of pin terminals, wherein;
each of the plurality of terminals of the LSI element includes a first conductive layer and a second conductive layer superposed on the first conductive layer;
each of the plurality of terminals of the wiring board includes a third conductive layer joined with the second conductive layer of each of the terminals of the LSI element;
the first, second, and third conductive layers are made of materials causing the metallic bond between the second conductive layer and third conductive layer to be stronger than the metallic bond between the first conductive layer and second conductive layer; and
the wiring board further includes a plurality of outer joining terminals connected to the plurality of pin terminals of the wiring board with wires.
4 Assignments
0 Petitions
Accused Products
Abstract
An LSI package comprises an LSI element and a wiring board. The plurality of pin terminals of the LSI element each includes a first conductive layer and a second conductive layer superposed on the first conductive layer. The plurality of pin terminals of the wiring board each includes a third conductive layer joined to the second conductive layer, and the wiring board further comprises outer joining terminals. The first, second, and third conductive layers are made of materials causing the metallic bond between the second conductive layer and third conductive layer to be stronger than the metallic bond between the first conductive layer and second conductive layer. The LSI element is tested using the outer joining terminals of the wiring board. The second conductive layer and third conductive layer are joined to attain a metallic bond through aggregation derived from pressure, and are reliably brought into electrical contact with each other for a test. After the test is completed, the terminals of the LSI element are peeled off from the terminals of the wiring board. At this time, the second conductive layer is transferred to the third conductive layer, and the first conductive layer is left intact in each of the terminals of the LSI element. The LSI element is then mounted on another wiring board.
89 Citations
20 Claims
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1. An LSI package comprising:
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at least one LSI element having a plurality of pin terminals; and
a wiring board having a plurality of pin terminals, wherein;
each of the plurality of terminals of the LSI element includes a first conductive layer and a second conductive layer superposed on the first conductive layer;
each of the plurality of terminals of the wiring board includes a third conductive layer joined with the second conductive layer of each of the terminals of the LSI element;
the first, second, and third conductive layers are made of materials causing the metallic bond between the second conductive layer and third conductive layer to be stronger than the metallic bond between the first conductive layer and second conductive layer; and
the wiring board further includes a plurality of outer joining terminals connected to the plurality of pin terminals of the wiring board with wires. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An LSI element testing method comprising the steps of:
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providing an LSI element with a plurality of pin terminals each including a first conductive layer and a second conductive layer superposed on the first conductive layer;
forming on a wiring board a plurality of pin terminals each including a third conductive layer, and a plurality of outer joining terminals connected to the plurality of pin terminals with wires;
joining the plurality of terminals of the LSI element with the plurality of terminals of the wiring board so that the second conductive layers will be bonded to the third conductive layers; and
testing the LSI element using the plurality of outer joining terminals of the wiring board, wherein;
the first, second, and third conductive layers are made of materials causing the metallic bond between the second conductive layer and third conductive layer to be stronger than the metallic bond between the first conductive layer and second conductive layer.
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12. A semiconductor device manufacturing method comprising the steps of:
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providing an LSI element with a plurality of pin terminals each including a first conductive layer and a second conductive layer superposed on the first conductive layer;
forming on a wiring board a plurality of pin terminals each including a third conductive layer, and a plurality of outer joining terminals connected to the plurality of pin terminals with wires;
joining the plurality of terminals of the LSI element with the plurality of terminals of the wiring board so that the second conductive layers will be bonded to the third conductive layers;
testing the LSI element using the plurality of outer joining terminals of the wiring board;
transporting the LSI element and wiring board to a position different from a position of testing;
peeling off the plurality of terminals of the LSI element from the plurality of terminals of the wiring board; and
joining the plurality of terminals of the LSI element with the plurality of terminals of another wiring board, wherein;
the first, second, and third conductive layers are made of materials causing the metallic bond between the second conductive layer and third conductive layer to be stronger than the metallic bond between the first conductive layer and second conductive layer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification