KR102600194B1 - 열흡수 패드를 구비하는 방열장치 - Google Patents
열흡수 패드를 구비하는 방열장치 Download PDFInfo
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- KR102600194B1 KR102600194B1 KR1020220016728A KR20220016728A KR102600194B1 KR 102600194 B1 KR102600194 B1 KR 102600194B1 KR 1020220016728 A KR1020220016728 A KR 1020220016728A KR 20220016728 A KR20220016728 A KR 20220016728A KR 102600194 B1 KR102600194 B1 KR 102600194B1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
- H05K7/20445—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff
- H05K7/20472—Sheet interfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
- H01L23/427—Cooling by change of state, e.g. use of heat pipes
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Thermal Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
도 2는 본 발명의 방열장치가 설치되는 SSD의 개략도이다.
도 3은 본 발명의 방열장치의 단면도이다.
도 4는 캡핑 필름으로 열흡수 패드를 밀봉하는 조립도이다.
도 5는 방열 특성 시험 장치에 대한 개요도이다.
캡슐 | 사이즈 | 캡슐벽 두께 | 캡슐 내 물질 |
Insilico P-Thermoball 45BN | 7 ~ 20um | 200~300nm | N-Docosane |
캡슐 | 사이즈 | 캡슐벽 두께 | 캡슐 내 물질 |
Microtek 43D | 15 ~ 30um | 60~100nm | Paraffin Wax |
항목 | 배합성 | 성형성 | 열충격신뢰성 | 고온 신뢰성 |
방열 특성 |
비고 |
실시예 | O | O | O | O | T1:45℃ T2:32℃ |
방열특성 등 모든 결과가 안정적임 |
비교예1 | O | O | X | O | - | 캡슐벽의 두께가 얇고 캡슐의 size가 커 열충격시험 후 캡슐이 파괴되어 봉지된 PET필름 내부에 파라핀이 심하게 누출. (고온에서는 액상으로 존재하고 상온에서 매우 딱딱해짐) |
비교예2 | O | X | X | O | - | 캡슐파우더의 투입양이 너무 많아 배합이 이루어 지지 않음. |
비교예3 | O | X | X | O | - | 배합 시 RPM이 너무 높아 캡슐이 물리적인 힘에 의하여 파괴되어 캡슐 내부의 파라핀이 외부로 유출됨. 유출 후 고온에서 액상으로 존재하여 Pad의 성형이 이루어지지 않음. |
비교예4 | O | O | X | O | - | 성형시 경화온도가 너무 높아 캡슐벽이 성형이 많이 파괴되어 열충격 신뢰성 후 비교예 1과 동일한 현상 발생. |
비교예5 | O | O | X | O | - | 열충격 시험 후 파라핀이 외부로 유출되어 외관 불량 발생. |
비교예6 | O | O | X | O | - | 약간의 파라핀이 누출된 후 상대적으로 밀도가 낮은 PE필름을 기체상태로 통과하여 필름 외부로 유출 및 외관불량 발생. |
비교예7 | O | O | O | X | T1:46℃ T2:33℃ |
고온 신뢰성 후 Pad의 경도가 높아져 조립성 불량. |
비교예8 | O | O | O | O |
T1:43℃ T2:40℃ |
T1(발열부 칩셋)의 온도는 매우 안정적이나 T2(케이스)의 온도가 너무 높아 Fail. |
Claims (7)
- 인쇄회로기판(1)에 실장되는 반도체 칩(2)의 상면에 접촉하고, 경화된 실리콘 바인더(11)와 상기 실리콘 바인더 내부에 분산된 상변화 마이크로캡슐(12)을 구비하는 열흡수 패드(10) ; 및
상기 열흡수 패드(10)를 둘러싸 밀봉하는 캡핑 필름(20)을 구비하는 방열 장치로서,
상기 방열 장치는 전자기기의 하우징(30, 케이싱) 내부에 설치되고, 상기 반도체 칩에서 발생되는 열이 상기 캡핑 필름(20)을 경유하여 상기 열흡수 패드로 전달되면, 상기 열흡수 패드는 상기 상변화 마이크로 캡슐로 열을 흡수하여 상기 하우징(30, 케이싱) 외측으로의 열전달을 차단하는 것을 특징으로 하는 방열 장치. - 제 1항에 있어서, 상기 열흡수 패드는 상기 실리콘 바인더 100중량부 대비 50~130중량부의 마이크로 캡슐(12)을 포함하는 것을 특징으로 하는 방열 장치.
- 제 1항에 있어서, 상기 열흡수 패드(10)는 두께(L)가 1~20mm인 판상의 패드이고,
상기 캡핑 필름은 두께(S)가 10~350㎛m인 필름으로 상기 열흡수 패드를 감싼 후 필름이 접착되고, 또는 상부 필름과 하부 필름 사이에 상기 열흡수 패드를 위치시킨 후 상부 필름과 하부 필름의 가장자리가 접착되는 것을 특징으로 하는 방열 장치. - 제 1항에 있어서, 상기 마이크로 캡슐(12)은 40~50℃ 범위에서의 융점을 가지는 상변화 물질을 내부에 포함하고,
상기 상변화 물질의 열용량이 180J/g 이상이고, 상기 마이크로 캡슐(12)의 크기가 5~25㎛인 것을 특징으로 하는 방열 장치. - 제 1항에 있어서, 상기 필름(20)은 밀도가 1.2g/㎤ 이상이고, 유리전이온도가 60℃ 이상인 것을 특징으로 하는 방열 장치.
- 제 1항에 있어서, 상기 필름(20)은 PET(polyethylene terephthalate) 또는 폴리이미드인 것을 특징으로 하는 방열 장치.
- 제 1항에 있어서, 상기 실리콘 바인더는 경도가 40~50(Shore 00 type) 및 연신율이 30~70% 인 것을 특징으로 하는 방열 장치.
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