Multi-chip package capable of testing internal signal lines
First Claim
1. A multi-chip package comprising:
- a printed circuit board;
a first semiconductor chip on the printed circuit board, the first semiconductor chip including a test circuit and a plurality of pads; and
second semiconductor chips on the printed circuit board, the second semiconductor chips electrically connected to the first semiconductor chip via a plurality of internal signal lines, each of the internal signal lines being a bonding wire,wherein the test circuit is configured to detect short-circuit between at least two of the plurality of internal signal lines that are respectively connected to at least two pads of the plurality of pads by (1) enabling circuits of the first semiconductor chip respectively connected to the plurality of pads contacting the plurality of internal signal lines, and (2) transmitting complementary data to the at least two pads.
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-chip package capable of testing internal signal lines including a printed circuit board, a first semiconductor chip mounted on the printed circuit board and including a test circuit, and second semiconductor chips mounted on the printed circuit board and electrically connected to the first semiconductor chip via a plurality of internal signal lines may be provided. The test circuit may be configured to enable circuits of the first semiconductor chip connected to pads contacting the plurality of internal signal lines, transmit complementary data to at least two pads from among the pads, and form a current path in the circuits connected to the at least two pads, thereby detecting a short-circuit between the internal bonding wires.
18 Citations
20 Claims
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1. A multi-chip package comprising:
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a printed circuit board; a first semiconductor chip on the printed circuit board, the first semiconductor chip including a test circuit and a plurality of pads; and second semiconductor chips on the printed circuit board, the second semiconductor chips electrically connected to the first semiconductor chip via a plurality of internal signal lines, each of the internal signal lines being a bonding wire, wherein the test circuit is configured to detect short-circuit between at least two of the plurality of internal signal lines that are respectively connected to at least two pads of the plurality of pads by (1) enabling circuits of the first semiconductor chip respectively connected to the plurality of pads contacting the plurality of internal signal lines, and (2) transmitting complementary data to the at least two pads. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A multi-chip package comprising:
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a printed circuit board; a first semiconductor chip on the printed circuit board, the first semiconductor chip including a test circuit, a first pad, and a second pad; and second semiconductor chips on the printed circuit board, the second semiconductor chips electrically connected to the first semiconductor chip via a plurality of internal signal lines, each of the plurality of internal signal lines being a bonding wire, wherein the test circuit is configured to detect short-circuit between at least two of the plurality of internal signal lines that are respectively connected to the first pad and the second pad by inverting one of a first data and a second data by (1) enabling first and second circuits of the first semiconductor chip that are connected to the first pad and the second pad thereof, respectively, each of which is connected to a corresponding one of the plurality of internal signal lines of the multi-chip package, (2) outputting the first data to the first pad through the first circuit, and (3) receiving the second data from the second pad through the second circuit. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A multi-chip package comprising:
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a printed circuit board; a first semiconductor chip on the printed circuit board, the first semiconductor chip including a test circuit, a plurality of pads including a first pad and a second pad, an input driver, and an output driver, the test circuit including, a write path selection circuit configured to provide first data to the first pad, from among the plurality of pads, via the output driver, a read path selection circuit configured to receive second data from the second pad, from among the plurality of pads, via the input driver, a data inversion circuit configured to invert one of the first data and the second data, a first switch configured to provide the first data of the write path selection circuit to the data inversion circuit, and a second switch configured to provide the second data of the read path selection circuit to the data inversion circuit; and second semiconductor chips on the printed circuit board, the second semiconductor chips electrically connected to the first pad and the second pad of the first semiconductor chip via a plurality of internal signal lines, each of the plurality of internal signal lines being a bonding wire, wherein the test circuit is configured to detect short-circuit between at least two of the plurality of internal signal lines that are respectively connected to the first pad and the second pad by (1) enabling circuits of the first semiconductor chip respectively connected to the first pad and the second pad, and (2) transmitting complementary data to the first pad and the second pad. - View Dependent Claims (17, 18, 19, 20)
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Specification