Vacuum-enhanced heat spreader

A heat spreader comprising:

• a first layer;
• a second layer having a thickness less than the first layer and having a thermal conductivity less than the thermal conductivity of the first layer;
• and
• a vacuum chamber disposed between the first layer and the second layer, wherein the first layer and the second layer are hermitically sealed together forming the vacuum chamber.

A method comprising:

• providing a first layer with a thickness of less than 300 microns;
• depositing a plurality of pillars on the first layer in a pattern, wherein each pillar of the plurality of pillars has a height of less than 200 microns;
• providing a second layer over the first layer and the plurality of pillars creating a vacuum chamber, wherein the second layer has a thickness of less than 200 microns;
• sealing a portion of the second layer with a portion of the first layer;
• and
• evacuating the vacuum chamber.