US 12,225,695 B2
Electrical device
Youji Shirato, Hokkaido (JP); Naoki Saitou, Hokkaido (JP); and Norihiro Kawamura, Hokkaido (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Jan. 19, 2023, as Appl. No. 18/098,989.
Claims priority of application No. 2022-013568 (JP), filed on Jan. 31, 2022.
Prior Publication US 2023/0247806 A1, Aug. 3, 2023
Int. Cl. H05K 7/20 (2006.01); H05K 1/02 (2006.01)
CPC H05K 7/209 (2013.01) [H05K 1/0203 (2013.01); H05K 7/2039 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An electrical device comprising:
a heat generator having a first surface;
a heat dissipator having a second surface facing the first surface; and
a thermal conductive sheet and a thermal conductive fluid, the thermal conductive sheet and the thermal conductive fluid being both interposed between the first surface and the second surface,
the first surface and the second surface facing each other in their respective counter regions, each of the counter regions including a first region and a second region when viewed in a direction in which the first surface and the second surface face each other,
the first region holding the thermal conductive fluid but not receiving the thermal conductive sheet, and
the second region being adjacent to the first region and receiving the thermal conductive sheet, wherein
a thickness of the thermal conductive sheet interposed between first surface and the second surface is smaller than a thickness of the thermal conductive sheet to which no pressure is applied in a thickness direction,
a compression ratio of a thickness of the thermal conductive sheet, to which a pressure of 500 kPa is applied in the thickness direction, to the thickness of the thermal conductive sheet, to which no pressure is applied in the thickness direction, is equal to or greater than 0.15.