Sensor, method, and design structure for a low-k delamination sensor
View Patent ↗The invention generally relates to a design structure of a circuit design, and more particularly to a design structure of a delamination sensor for use with low-k materials. A delamination sensor includes at least one first sensor formed in a layered semiconductor structure and a second sensor formed in the layered semiconductor structure. The at least one first sensor is structured and arranged to detect a defect, and the second sensor is structured and arranged to identify an interface where the defect exists.
1. A delamination sensor, comprising:
at least one first sensor formed in a layered semiconductor structure; and
a second sensor formed in the layered semiconductor structure;
wherein the at least one first sensor is structured and arranged to detect a defect, and
the second sensor is structured and arranged to identify an interface where the defect exists.
2. The delamination sensor of claim 1 , wherein the layered semiconductor structure comprises a wafer and a plurality of layers of dielectric material formed on the wafer, and
the defect comprises a delamination of respective ones of the plurality of layers.
3. The delamination sensor of claim 2 , wherein the plurality of layers of dielectric material comprise low-k dielectric material.
4. The delamination sensor of claim 1 , wherein the at least one first sensor comprises a plurality of position sensors located at respective corners of the layered semiconductor structure, and
the second sensor comprises a plurality of via chains.
5. The delamination sensor of claim 4 , wherein each respective one of the plurality of via chains spans a unique group of layers of the layered semiconductor structure.
6. The delamination sensor of claim 4 , wherein the plurality of position sensors and the plurality of via chains comprise copper in portions of the layered semiconductor structure.
7. The delamination sensor of claim 1 , wherein the at least one first sensor comprises an electrical circuit.
8. The delamination sensor of claim 7 , wherein the second sensor comprises a plurality of electrically conductive via chains.
9. The delamination sensor of claim 8 , wherein:
an electrical continuity of the electrical circuit is detectable for determining a position of the defect within a footprint of the layered semiconductor structure, and
electrical continuities of respective ones of the plurality of via chains are detectable and comparable for identifying the interface.
10. The delamination sensor of claim 8 , further comprising a computing device structured and arranged to:
measure a continuity of the electrical circuit; and
measure and compare continuities of the plurality of via chains.
11. The delamination sensor of claim 8 , wherein the electrical circuit has a resistance of about 10 Ohm to about 10 kOhm.
12. A design structure embodied in a machine readable medium for designing, manufacturing, or testing an integrated circuit, the design structure comprising:
at least one first sensor formed in a layered semiconductor structure; and
a second sensor formed in the layered semiconductor structure;
wherein the at least one first sensor is structured and arranged to detect a defect, and
the second sensor is structured and arranged to identify an interface between respective layers where the defect exists.
13. The design structure of claim 12 , wherein the design structure comprises a netlist.
14. The design structure of claim 12 , wherein the design structure resides on a storage medium as a data format used for the exchange of layout data of integrated circuits.
15. The design structure of claim 12 , wherein the design structure includes at least one item selected from the group consisting of test data files, characterization data, verification data, and design specifications.
16. A method, comprising:
detecting, using a first sensor, a location of a defect within a footprint of a semiconductor structure; and
detecting, using a second sensor, an interface between two respective layers of the semiconductor structure at which the defect exists wherein the second sensor comprises a plurality of via chains, and the detecting the interface include detecting and comparing continuity/discontinuity of respective ones of the plurality of via chains.
17. The method of claim 16 , wherein the defect comprise a delamination.
18. The method of claim 16 , wherein:
the semiconductor structure comprises a plurality of layers of dielectric material, and
the two respective layers are included in the plurality of layers of dielectric material.
19. The method of claim 18 , wherein the dielectric material comprises low-k dielectric material.