Temperature-uniforming plate with supporting effect

A temperature-uniforming plate comprising:

• a base plate formed with a heat conducting surface and a inside surface, wherein a contacting area is formed on the heat conducting surface and adapted to be abutted a heat source;
• a cover plate mounted onto the base plate, the cover plate formed with a top surface and a bottom surface;
• a frame sandwiched between the inside surface of the base plate and the bottom surface of the cover plate;
• a vacuum chamber defined among the inside surface of the base plate, the bottom surface of the cover plate and an interior of the frame, wherein the vacuum chamber is provided for containing coolant;
• at least one capillary structure and at least one supporting structure disposed in the vacuum chamber, wherein the at least one supporting structure has two opposite ends respectively abutting against the inside surface of the base plate and the bottom surface of the cover plate;
• two arms respectively extending from the interior of the frame and corresponding to each other, wherein each arm has a distal end separated from each other, the two arms sandwiched between the inside surface of the base plate and the bottom surface of the cover plate;
• and
• a passage defined between the two distal ends of the two arms, the distal end of each of the two arms situated within the contacting area.