A heat spreading module for a portable electronic device configured such that a heat pipe is attached along a metal plate, a heating element is attached to the heat pipe, and heat of a heated region of the metal plate is transferred to a place on the metal plate apart from the heated region by the heat pipe, wherein
- the heat pipe is configured such that a container is formed of a pipe made of metal, a portion of the container arranged on the heated region is a heated portion, a portion of the container apart from the heated region is a heat dissipation portion that is arranged on the metal plate and dissipates heat to the metal plate, a wick is arranged inside the container and is fixed to an upper inner surface of the container, and a vapor-path space portion is formed between the wick and a lower inner surface of the container,
- the heated portion is formed in a flat shape in such a manner that the container is squashed, and the heat dissipation portion is formed to be thicker than the heated portion having the flat shape,
- the metal plate has a hole portion having a predetermined length formed in a portion corresponding to the heated region,
- the heated portion having the flat shape is arranged inside the hole portion,
- in the heated region, the heating element is arranged on an upper surface of the heated portion of the heat pipe and is apart from the metal plate, and heat is transferred from the heating element to the metal plate and the upper surface of the heated portion of the heat pipe,
- a first part of the heat dissipation portion is extended from a cavity of the hole portion and onto an outer surface of the metal plate facing the heating element,
- the first part of the heat dissipation portion is longitudinally extended along the outer surface to a side of the metal plate, and
- a second part of the heat dissipation portion is longitudinally extended, from a longitudinal end of the first part of the heat dissipation portion furthest away from the heated portion, along the outer surface and the side of the metal plate,
- wherein the metal plate and the heating element are not in direct physical contact,
- wherein the heated portion is in direct physical contact with the heating element and interposes the metal plate and the heating element,
- wherein in a direction from the metal plate to the heating element, the heated portion comprises a greater thickness in the direction than the metal plate,
- wherein the heated portion is arranged within the cavity of the hole portion of the metal plate and is extended out of the cavity in the direction from the metal plate to the heating element, and
- wherein a portion of the heated portion is extended further in the direction towards the heating element than the metal plate such that the portion of the heated element is closer to the heating element than the metal plate is to the heating element.