| 摘要 |
An electronic component unit includes: a substrate; an electronic component mounted on the surface of the substrate; a heat dissipating member received on the electronic component; a cylinder member having one end coupled to the substrate, the cylinder member having the other end defining an opening opposed to the heat dissipating member; and a piston member having one end coupled to the heat dissipating member, the piston member having the other end inserted in the cylinder member through the opening to establish a closed decompressed space inside the cylinder member.
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