Semiconductor device and method of fabricating the same
First Claim
1. A semiconductor device comprising:
- a semiconductor substrate formed thereon with at least one recessed portion;
an electrically conductive layer covering at least a surface of said recessed portion therewith;
a thin, electrically conductive film formed over said electrically conductive layer within said recessed portion;
a protection film formed over said electrically conductive layer, wherein an edge portion of said protection film abuts an edge portion of said thin, electrically conductive film; and
a ball-bump formed on said electrically conductive layer within said recessed portion.
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Accused Products
Abstract
The invention provides a semiconductor device including a semiconductor substrate formed thereon with at least one recessed portion, an electrically conductive layer covering at least a surface of the recessed portion therewith, and a ball-bump formed on the electrically conductive layer within the recessed portion. The semiconductor device can act as a probe card by additionally having a tester device formed in the semiconductor substrate and provided with a function of testing electrical performances of a semiconductor device. Since the recessed portion can be formed by lithography technique, it is possible to arrange the greater number of pins in a smaller pitch, and in addition, it is also possible to locate ball-bumps in place with higher accuracy than a conventional semiconductor device.
66 Citations
25 Claims
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1. A semiconductor device comprising:
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a semiconductor substrate formed thereon with at least one recessed portion; an electrically conductive layer covering at least a surface of said recessed portion therewith; a thin, electrically conductive film formed over said electrically conductive layer within said recessed portion; a protection film formed over said electrically conductive layer, wherein an edge portion of said protection film abuts an edge portion of said thin, electrically conductive film; and a ball-bump formed on said electrically conductive layer within said recessed portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor device comprising:
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a semiconductor substrate formed thereon with at least one recessed portion; a circuit pattern formed in said semiconductor substrate; an electrically conductive layer covering at least a surface of said recessed portion therewith; a ball-bump formed on said electrically conductive layer within said recessed portion; and a tester device formed in said semiconductor substrate, said tester device having a function of testing electrical performances of a semiconductor device so that said semiconductor device can act as a probe card; wherein said circuit pattern is electrically connected to said electrically conductive layer via through holes formed in said semiconductor substrate. - View Dependent Claims (12, 13)
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14. A semiconductor device comprising:
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a semiconductor substrate formed on one of upper and lower surfaces thereof with at least one recessed portion; an electrically conductive layer covering at least a surface of said recessed portion therewith; a ball-bump formed on said electrically conductive layer within said recessed portion; a circuit pattern formed on the other of said upper and lower surfaces from said semiconductor substrate, said circuit pattern being electrically connected to said electrically conductive layer via through holes formed in said semiconductor substrate; and a semiconductor chip disposed on said circuit pattern in electrical connection therewith to constitute a tester device having a function of testing electrical performances of a semiconductor device so that said semiconductor device can act as a probe card. - View Dependent Claims (15, 16, 17)
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18. A semiconductor device comprising:
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a semiconductor substrate formed on one of upper and lower surfaces thereof with at least one recessed portion; an electrically conductive layer covering at least a surface of said recessed portion therewith; a ball-bump formed on said electrically conductive layer within said recessed portion; a circuit pattern formed on the other of said upper and lower surfaces from said semiconductor substrate, said circuit pattern being electrically connected to said electrically conductive layer via through holes formed in said semiconductor substrate; a tester device formed below said other of said upper and lower surfaces from said semiconductor substrate, said tester device having a function of testing electrical performances of a semiconductor device so that said semiconductor device can act as a probe card; a light emitting device being designed to emit a light to a semiconductor device which has been found defective by said tester device; and a semiconductor chip disposed on said circuit pattern in electrical connection therewith, said semiconductor chip being designed to have a function for changing specification of said tester device.
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19. A semiconductor device comprising:
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a semiconductor substrate formed thereon with at least one recessed portion; a circuit pattern formed in said semiconductor substrate; a protection film formed over a surface of said semiconductor substrate; an electrically conductive layer covering at least a surface of said recessed portion therewith; and a ball-bump formed on said electrically conductive layer within said recessed portion; wherein said circuit pattern is electrically connected to said electrically conductive layer via through holes formed in said semiconductor substrate. - View Dependent Claims (20, 21, 22, 23)
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24. A semiconductor device comprising:
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a semiconductor substrate formed thereon with at least one recessed portion, wherein said semiconductor substrate is formed with at least one through hole through which a light is to pass or a probe is to be inserted; an electrically conductive layer covering at least a surface of said recessed portion therewith; a ball-bump formed on said electrically conductive layer within said recessed portion; and a tester device formed in said semiconductor substrate, said tester device having a function of testing electrical performances of a semiconductor device so that said semiconductor device can act as a probe card.
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25. A semiconductor device comprising:
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a semiconductor substrate formed thereon with at least one recessed portion, wherein said semiconductor substrate is formed with at least one through hole through which a light is to pass or a probe is to be inserted; a protection film formed over a surface of said semiconductor substrate; an electrically conductive layer covering at least said recessed portion therewith; a ball-bump formed on said electrically conductive layer within said recessed portion; and a tester device formed in said semiconductor substrate, said tester device having a function of testing electrical performances of a semiconductor device so that said semiconductor device can act as a probe card.
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Specification