Heat diffusing device and method of producing the same
AssigneeSony Corporation
InventorYasuo Kawabata
Life of this patent
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Abstract
A heat diffusing device includes first and second metallic thin plates that are alternately laminated to each other, and that are joined along with an upper sealing metallic thin plate and a lower sealing metallic thin plate by diffusion joining so as to form a sealed space in an interior defined by the first and second thin plates and the upper and lower sealing metallic thin plates. A C-shaped groove defined by a steep wall face is formed at a wall face defining the sealed space due to a difference (Δw) between the dimensions of the first metallic thin plates and the dimensions of the second metallic thin plates.
Claims10
A heat diffusing device comprising:
- first metallic thin plates and second metallic thin plates, dimensions of the first metallic thin plates being different from dimensions of the second metallic thin plates;
- an upper sealing metallic thin plate;
- and
- a lower sealing metallic thin plate,
- wherein the first and second metallic thin plates are alternately laminated to each other, and are joined along with the upper and lower sealing metallic plates by diffusion joining so that a sealed space is formed in an interior defined by the first and second metallic thin plates and the upper and lower sealing metallic plates,
- wherein a groove defined by a steep wall face is formed at a wall face defining the sealed space due to the difference between the dimensions of the first and second metallic thin plates, and
- wherein a liquid is sealed in the groove under reduced pressure in an initial state.
A method of producing a heat diffusing device comprising the steps of:
- alternately laminating first and second metallic thin plates to each other, and disposing sealing metallic thin plates at a top side and a bottom side of the laminated first and second metallic thin plates, dimensions of the first metallic thin plates being different from dimensions of the second metallic thin plates;
- forming an integrated laminated body by subjecting the first and second metallic thin plates and the sealing metallic thin plates to diffusion bonding, forming a sealed space in an interior of the laminated body, and forming a groove at a wall face of the sealed space due to the difference between the dimensions of the first and second metallic thin plates, the groove being defined by a steep wall face;
- and
- sealing a liquid in the groove in an initial state in which pressure in the sealed space is reduced.
Dependencies are inferred from the claim text.