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Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging

This research was carried out to synthesize magnesium oxide (MgO) and magnesium oxide - zinc oxide (MgO/ZnO) multilayer thin film as a TIM cum heat spreader for efficient thermal management in LEDs packaging system. MgO (10 layers) and MgO/ZnO multilayer (stacked separately in a configuration of 9:1...

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Main Author: Sani, Idris Muhammad
Format: Thesis
Language:English
Published: 2021
Subjects:
QC1 Physics (General)
Online Access:http://eprints.usm.my/51943/1/IDRIS%20MUHAMMAD%20SANI%20-%20TESIS.pdf
http://eprints.usm.my/51943/
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spelling my.usm.eprints.51943 http://eprints.usm.my/51943/ Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging Sani, Idris Muhammad QC1 Physics (General) This research was carried out to synthesize magnesium oxide (MgO) and magnesium oxide - zinc oxide (MgO/ZnO) multilayer thin film as a TIM cum heat spreader for efficient thermal management in LEDs packaging system. MgO (10 layers) and MgO/ZnO multilayer (stacked separately in a configuration of 9:1, 8:2, 7:3, 6:4 and 5:5 layers) thin films are coated over aluminum (Al 5052 grade) and copper (Cu) substrates using spin coating technique. In the first part, MgO thin film was synthesis using 0.6 M, 10 coating cycles, preheated at 200 °C for 20 minutes, and finally annealed at 600 °C for 1 hour. Structural characterization by XRD shows the presence of (200), (220), and (222) MgO phases with crystalline size (37.47 nm), reduced microstrain (2.5 x 10-3) and dislocation density (7.0 x 10-4 lines/m2) for 0.6 M MgO coated Al. Uniform distribution of 74 nm size grains and surface roughness of 19.11 nm were confirmed by FESEM and AFM analysis. A significant difference in junction temperature (ΔTJ = 24.7%) and total thermal resistance (ΔRth-tot = 3.86 K/W) were recorded for LED fixed on 0.6 M MgO coated Al compared to that of bare Al. In the second part, ZnO was added to the monolithic MgO to improve the structural, surface, and thermal transport properties of MgO. Among the studied MgO/ZnO multilayers, 6:4 L MgO/ZnO displayed larger crystalline sizes of 52 nm (Al) and 35 nm (Cu) with thermal conductivity of 24.31 W/mK (Al), and 15.13 W/mK (Cu) respectively. 6:4 L MgO/ZnO multilayer films showed lower surface roughness (9.6 nm (Al) and 2.6 nm (Cu)) with uniformly distributed grains and presence of large numbers of contact points to the LEDs package 2021-02 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/51943/1/IDRIS%20MUHAMMAD%20SANI%20-%20TESIS.pdf Sani, Idris Muhammad (2021) Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging. PhD thesis, Perpustakaan Hamzah Sendut.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic QC1 Physics (General)
spellingShingle QC1 Physics (General)
Sani, Idris Muhammad
Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging
description This research was carried out to synthesize magnesium oxide (MgO) and magnesium oxide - zinc oxide (MgO/ZnO) multilayer thin film as a TIM cum heat spreader for efficient thermal management in LEDs packaging system. MgO (10 layers) and MgO/ZnO multilayer (stacked separately in a configuration of 9:1, 8:2, 7:3, 6:4 and 5:5 layers) thin films are coated over aluminum (Al 5052 grade) and copper (Cu) substrates using spin coating technique. In the first part, MgO thin film was synthesis using 0.6 M, 10 coating cycles, preheated at 200 °C for 20 minutes, and finally annealed at 600 °C for 1 hour. Structural characterization by XRD shows the presence of (200), (220), and (222) MgO phases with crystalline size (37.47 nm), reduced microstrain (2.5 x 10-3) and dislocation density (7.0 x 10-4 lines/m2) for 0.6 M MgO coated Al. Uniform distribution of 74 nm size grains and surface roughness of 19.11 nm were confirmed by FESEM and AFM analysis. A significant difference in junction temperature (ΔTJ = 24.7%) and total thermal resistance (ΔRth-tot = 3.86 K/W) were recorded for LED fixed on 0.6 M MgO coated Al compared to that of bare Al. In the second part, ZnO was added to the monolithic MgO to improve the structural, surface, and thermal transport properties of MgO. Among the studied MgO/ZnO multilayers, 6:4 L MgO/ZnO displayed larger crystalline sizes of 52 nm (Al) and 35 nm (Cu) with thermal conductivity of 24.31 W/mK (Al), and 15.13 W/mK (Cu) respectively. 6:4 L MgO/ZnO multilayer films showed lower surface roughness (9.6 nm (Al) and 2.6 nm (Cu)) with uniformly distributed grains and presence of large numbers of contact points to the LEDs package
format Thesis
author Sani, Idris Muhammad
author_facet Sani, Idris Muhammad
author_sort Sani, Idris Muhammad
title Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging
title_short Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging
title_full Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging
title_fullStr Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging
title_full_unstemmed Synthesis And Characterization Of MgO And MgO/ZnO Multilayer Thin Films For Heat Spreading Application In Light Emitting Diode Packaging
title_sort synthesis and characterization of mgo and mgo/zno multilayer thin films for heat spreading application in light emitting diode packaging
publishDate 2021
url http://eprints.usm.my/51943/1/IDRIS%20MUHAMMAD%20SANI%20-%20TESIS.pdf
http://eprints.usm.my/51943/
_version_ 1728052018249990144
score 13.211869

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