Probing plate for wafer testing
First Claim
1. A probing plate for wafer testing having a plurality of probes arranged so as to correspond to a plurality of bonding pads of semiconductor devices fabricated on a semiconductor wafer, comprising:
- an electrically insulating base plate having raised portions formed at predetermined positions in the major surface thereof;
contact conductors of a conductive film formed over the surfaces of said raised portions and serving as portions of said probes, respectively; and
wiring conductors formed integrally with said contact conductors over the major surface of said base plate in a predetermined pattern so as to extend respectively from said contact conductors,wherein said raised portions are formed respectively at distal ends of contact fingers formed by removing portions of said base plate selectively by a photolithographic process so as to extend at predetermined intervals and correspond to said plurality of bonding pads.
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Accused Products
Abstract
A probing plate for wafer testing is provided with a plurality of probes arranged so as to correspond to a plurality of bonding pads of semiconductor devices fabricated on a semiconductor wafer. The probing plate has a base plate formed of an insulating material, such as a photosensitive glass, and has contact fingers each having a raised portion in the free end thereof, contact conductors respectively formed on the surfaces of the raised portions of the contact fingers so as to be brought into contact with the corresponding bonding pads, and wiring conductors formed in a predetermined pattern on the surface of the base plate so as to extend respectively from the contact conductors. The contact conductors and the wiring conductors are formed simultaneously by a photolithographic process. The contact fingers and the raised portions thereof are also formed by subjecting the base plate to a photolithographic process. Forming the contact conductors over the surfaces of the raised portions of the contact fingers prevents accidental contact of the contact conductors with the bonding pads of semiconductor devices other than the objective semiconductor devices.
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Citations
8 Claims
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1. A probing plate for wafer testing having a plurality of probes arranged so as to correspond to a plurality of bonding pads of semiconductor devices fabricated on a semiconductor wafer, comprising:
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an electrically insulating base plate having raised portions formed at predetermined positions in the major surface thereof; contact conductors of a conductive film formed over the surfaces of said raised portions and serving as portions of said probes, respectively; and wiring conductors formed integrally with said contact conductors over the major surface of said base plate in a predetermined pattern so as to extend respectively from said contact conductors, wherein said raised portions are formed respectively at distal ends of contact fingers formed by removing portions of said base plate selectively by a photolithographic process so as to extend at predetermined intervals and correspond to said plurality of bonding pads. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification