{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/132746"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/132746","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Thermo-optic Phase Spectroscopy techniques for multiscale thermal conductance characterization in semiconductor integrated circuits","abstract":"Thermal management remains a critical challenge in the advancement of semiconductor integrated circuits, particularly with the emergence of three-dimensional (3D) architectures for high-performance applications. This thesis introduces Thermo-optic Phase Spectroscopy (TOPS), a family of non-destructive techniques for multiscale thermal conductance characterization across bulk materials, buried films and interfaces, and nanoscale films. Three variants are developed: Displacement TOPS (D-TOPS) for bulk solids, Immersion TOPS (I-TOPS) for deeply embedded films and interfaces, and High-Resolution TOPS (HR-TOPS) for nanoscale semiconductor films. Each technique combines AC laser heating, temperature sensing via probe beam deflection, and analytical modeling to extract thermal properties with high spatial resolution, sensitivity, and speed. A unified modeling framework accommodates multilayer structures with anisotropic thermal expansion and elastic constants. Experimental validation demonstrates TOPS’s ability to extract thermal conductivity and thermal boundary conductance with improved accuracy and reduced acquisition time compared to conventional methods. By enabling precise thermal conductance characterization across multiple scales, TOPS provides essential data for optimizing fabrication processes, improving thermal simulations, and guiding temperature sensor placement in next-generation IC designs.","abstract_html":"Thermal management remains a critical challenge in the advancement of semiconductor integrated circuits, particularly with the emergence of three-dimensional (3D) architectures for high-performance applications. This thesis introduces Thermo-optic Phase Spectroscopy (TOPS), a family of non-destructive techniques for multiscale thermal conductance characterization across bulk materials, buried films and interfaces, and nanoscale films. Three variants are developed: Displacement TOPS (D-TOPS) for bulk solids, Immersion TOPS (I-TOPS) for deeply embedded films and interfaces, and High-Resolution TOPS (HR-TOPS) for nanoscale semiconductor films. Each technique combines AC laser heating, temperature sensing via probe beam deflection, and analytical modeling to extract thermal properties with high spatial resolution, sensitivity, and speed. A unified modeling framework accommodates multilayer structures with anisotropic thermal expansion and elastic constants. Experimental validation demonstrates TOPS’s ability to extract thermal conductivity and thermal boundary conductance with improved accuracy and reduced acquisition time compared to conventional methods. By enabling precise thermal conductance characterization across multiple scales, TOPS provides essential data for optimizing fabrication processes, improving thermal simulations, and guiding temperature sensor placement in next-generation IC designs.","abstract_has_math":false,"creators":["Sun, Jinchi"],"institution":"University of Illinois Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Materials Science & Engr","degree_department":null,"school":null,"contributors":["Cahill, David G.","Cao, Qing","Sinha, Sanjiv","Anderson, Christopher P."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-12","date_published":"2025-12","updated_at":"2026-07-22T22:25:07Z","subjects":["Thermo-optic Phase Spectroscopy (TOPS)","Thermal conductance characterization","Semiconductor integrated circuits","AC laser heating","Probe beam deflection","Multiscale thermal analysis","3D IC architectures","Buried interfaces","Thermal boundary conductance","Nanoscale thin films"],"languages":["en"],"rights":["Copyright 2025 Jinchi Sun"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/132746","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Cahill, David G.","Cao, Qing","Sinha, Sanjiv","Anderson, Christopher P."]},{"key":"dc:creator","label":"Author","values":["Sun, Jinchi"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-12","2025-10-10"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Science & Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Thermo-optic Phase Spectroscopy (TOPS)","Thermal conductance characterization","Semiconductor integrated circuits","AC laser heating","Probe beam deflection","Multiscale thermal analysis","3D IC architectures","Buried interfaces","Thermal boundary conductance","Nanoscale thin films"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2025 Jinchi Sun"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/132746"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thermal management remains a critical challenge in the advancement of semiconductor integrated circuits, particularly with the emergence of three-dimensional (3D) architectures for high-performance applications. This thesis introduces Thermo-optic Phase Spectroscopy (TOPS), a family of non-destructive techniques for multiscale thermal conductance characterization across bulk materials, buried films and interfaces, and nanoscale films. Three variants are developed: Displacement TOPS (D-TOPS) for bulk solids, Immersion TOPS (I-TOPS) for deeply embedded films and interfaces, and High-Resolution TOPS (HR-TOPS) for nanoscale semiconductor films. Each technique combines AC laser heating, temperature sensing via probe beam deflection, and analytical modeling to extract thermal properties with high spatial resolution, sensitivity, and speed. A unified modeling framework accommodates multilayer structures with anisotropic thermal expansion and elastic constants. Experimental validation demonstrates TOPS’s ability to extract thermal conductivity and thermal boundary conductance with improved accuracy and reduced acquisition time compared to conventional methods. By enabling precise thermal conductance characterization across multiple scales, TOPS provides essential data for optimizing fabrication processes, improving thermal simulations, and guiding temperature sensor placement in next-generation IC designs.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-12-01","The student, Jinchi Sun, accepted the attached license on 2025-10-08 at 23:02.","The student, Jinchi Sun, submitted this Dissertation for approval on 2025-10-09 at 08:44.","This Dissertation was approved for publication on 2025-10-10 at 09:07.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22823 on 2026-02-19 at 20:08:32"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Thermo-optic Phase Spectroscopy techniques for multiscale thermal conductance characterization in semiconductor integrated circuits"]}]}],"canonical_facts":{"dc:contributor":["Cahill, David G.","Cao, Qing","Sinha, Sanjiv","Anderson, Christopher P."],"dc:creator":["Sun, Jinchi"],"dc:date":["2025-12","2025-10-10"],"dc:description":["Thermal management remains a critical challenge in the advancement of semiconductor integrated circuits, particularly with the emergence of three-dimensional (3D) architectures for high-performance applications. This thesis introduces Thermo-optic Phase Spectroscopy (TOPS), a family of non-destructive techniques for multiscale thermal conductance characterization across bulk materials, buried films and interfaces, and nanoscale films. Three variants are developed: Displacement TOPS (D-TOPS) for bulk solids, Immersion TOPS (I-TOPS) for deeply embedded films and interfaces, and High-Resolution TOPS (HR-TOPS) for nanoscale semiconductor films. Each technique combines AC laser heating, temperature sensing via probe beam deflection, and analytical modeling to extract thermal properties with high spatial resolution, sensitivity, and speed. A unified modeling framework accommodates multilayer structures with anisotropic thermal expansion and elastic constants. Experimental validation demonstrates TOPS’s ability to extract thermal conductivity and thermal boundary conductance with improved accuracy and reduced acquisition time compared to conventional methods. By enabling precise thermal conductance characterization across multiple scales, TOPS provides essential data for optimizing fabrication processes, improving thermal simulations, and guiding temperature sensor placement in next-generation IC designs.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-12-01","The student, Jinchi Sun, accepted the attached license on 2025-10-08 at 23:02.","The student, Jinchi Sun, submitted this Dissertation for approval on 2025-10-09 at 08:44.","This Dissertation was approved for publication on 2025-10-10 at 09:07.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22823 on 2026-02-19 at 20:08:32"],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/132746"],"dc:language":["en"],"dc:rights":["Copyright 2025 Jinchi Sun"],"dc:subject":["Thermo-optic Phase Spectroscopy (TOPS)","Thermal conductance characterization","Semiconductor integrated circuits","AC laser heating","Probe beam deflection","Multiscale thermal analysis","3D IC architectures","Buried interfaces","Thermal boundary conductance","Nanoscale thin films"],"dc:title":["Thermo-optic Phase Spectroscopy techniques for multiscale thermal conductance characterization in semiconductor integrated circuits"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Materials Science & Engr"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:07Z"}