Patent ID: 9553428
Date: 2017-01-24
CPC Classifications: H02B,H05K

Claim:
1. A power supply module comprising: a circuit board including a first principal surface, a second principal surface, and side surfaces, the circuit board including electronic components mounted on the first principal surface; a heatsink plate including a plate-shaped body portion that faces the first principal surface and a plurality of fixing portions that extend at an angle from the body portion to face the side surfaces, the fixing portions being configured to come into contact with the second principal surface to secure the body portion to the circuit board; and a sheet member having elasticity and being arranged between the first principal surface and the body portion such that the sheet member presses against and is in contact with the body portion and at least one of the electronic components mounted on the first principal surface; wherein the fixing portions are each provided with a protrusion in contact with the second principal surface; the body portion includes a recessed portion extending toward the circuit board such that a distance from a portion of the body portion including the recessed portion to the circuit board is less than a distance from portions of the body portion not including the recessed portion to the circuit board; the electronic components include a first electronic component and a second electronic component; a height h the recessed portion overlaps with the second electronic component in a plan view in a direction perpendicular to the first principal surface; the portions of the body portion not including the recessed portion overlap with the first electronic component in the plan view; and a depth of the recessed portion is substantially the same as a difference between the height h