Characteristic enhancement of white LED lamp using low temperature co-fired ceramic-chip on board package |
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Authors: | Jae-Kwan SimK. Ashok Yong-Ho RaHong-Chul Im Byung-Joon BaekCheul-Ro Lee |
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Affiliation: | a Semiconductor Materials and Process Laboratory, School of Advanced Materials Engineering, Engineering College, Research Center for Advanced Materials Development (RCAMD), Chonbuk National University, Deokjin-dong 664-14, Chonju 561-756, Republic of Korea b Department of Physics and Nanotechnology, SRM University, Kattankulathur 603203, India |
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Abstract: | In this paper, we propose low temperature co-fired ceramic-chip on board (LTCC-COB) package with improved thermal characteristics; no insulation layer exists between the LED chip and metal base. In actual measurement as well as in thermal simulation, the proposed LED lamp structure showed excellent thermal properties, compared with surface mound device-printed circuit board (SMD-PCB) package LED lamp. The optical output power, thermal distribution, current-voltage (I-V) and electroluminescence (EL) were measured and compared to analyze the characteristics of LTCC-COB package LED lamp with SMD-PCB package LED lamp. EL peak intensity of LTCC-COB package LED lamp is 1.75 times better than that of SDM-PCB package LED lamp. The thermal resistance between packing area and air was found to be 7.3 K/W and 7.9 K/W for LTCC-COB package and SMD-PCB package respectively. The proposed LTCC-COB packaged LED lamp is not only suitable for high power LED package due to its low thermal resistance but also a promising solution for illumination modules. |
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Keywords: | SMD LTCC Thermal characteristics Chromaticity shift LED lamp |
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