Combining element of heat dissipation unit and heat dissipation unit thereof

Abstract

The present application is a combination element of a heat dissipation unit and the heat dissipation unit. Four corners of the heat dissipation unit are combined with a bare chip type heat source by setting the combination element. The combination element has a screw, a sleeve with a containing space, and a clamping ring. The screw is provided with a spring. The end of the screw is provided with a clamping ring to prevent the spring from falling off. The screw and the spring are set in the containing space of the sleeve. The sleeve is provided with at least one gap communicating with the containing space. The clamping ring is set at the upper end of the sleeve. The lower side of the clamping ring is provided with a curled tongue. The tongue is extended into the containing space from the gap to press and clamp the spring, so that the spring is in a compressed state. When the heat dissipation unit is combined with the bare chip type heat source to exchange heat, rotating the clamping ring can make the tongue release the clamping of the spring to release the spring. The spring provides a uniform and synchronous downward pressure of the heat dissipation unit on the bare chip type heat source.

Description

TECHNICAL FIELD

[0001] The present application relates to a heat dissipation unit and its coupling element, in particular to a heat dissipation unit and its coupling element which can provide synchronous and uniform downward pressure, thereby avoiding damage or generating thermal resistance of a bare die type heat source and a heat dissipation unit due to unsynchronized and uneven contact stress. BACKGROUND

[0002] In order to provide electronic devices with high performance computing capabilities, high performance and high power chips are used. When the chips perform calculations, they generate a considerable amount of heat. Conventional computing chips have a package shell outside the chip, and the chip is covered inside the package shell to protect the chip from damage. As the computing performance of the chip improves, the chip generates higher temperatures than conventional chips when performing calculations. The package shell outside the chip has seriously affected the heat dissipation and heat conduction efficiency of the chip. Therefore, most chips on the market have been changed to bare die form for setting. However, the surface of the bare die is not flat, but is in the form of an outwardly convex arc, and there is no protective shell, so the heat exchange contact surface is small and the strength is low. Therefore, when the bare die is combined with the heat dissipation device, it is easy to be damaged and cracked.

[0003] In addition, when the conventional heat dissipation device is fixed above the heat source (bare die), a single locking point is sequentially locked, which causes the time points of each locking to be out of sync and easy to tilt the contact. The bare die cannot withstand such uneven pressure, which can cause the chip to crack and damage.

[0004] Referring to Figure 1 、 Figure 2 FIG. 1 is a schematic view of the combination of the existing heat dissipation device and the bare die. The heat source A (bare die type) is arranged on a substrate D. Four corners of the substrate D corresponding to the outside of the heat source A are provided with copper columns B having internal threads. The heat dissipation device C is provided with four holes C3 corresponding to the positions of the copper columns B, and the screw units C1 are arranged through the holes. The outside of the screw units C1 is sleeved with a spring C2. When the heat dissipation device C is locked and combined with the heat source A, the screw locking operation is usually performed by artificial or mechanical arm operation of an electric screwdriver directly and sequentially at a single point. In order to speed up the assembly time on the production line and complete it within a limited assembly time, each fixed screw is usually locked in place directly and quickly at one time. When the screw units C1 are locked to the fixed point one by one, the spring C2 sleeved on the screw units C1 also supports the heat source A in the direction of the heat source A, thereby causing uneven stress of single point locking and immediately knocking the heat source. The aforementioned heat source A (bare die) is brittle, and the locking of the single-point screw unit C1 and the pressure of the spring C2 cannot provide complete and uniform downward pressure (four corners of the bare die) to the heat source A (bare die). In addition, the bare die is easy to be damaged due to uneven stress.

[0005] Furthermore, the bare chip is rather fragile, and must be combined by providing a binding force with uniform downward pressure simultaneously from the four corners of the bare chip, as if the downward pressing force cannot be provided to the four corners of the bare chip with an average stress, warping and incomplete fitting or damage between the heat sink or heat dissipation device and the heat source (bare chip) will occur, and thermal impedance will be formed, which will cause uneven heating or heat conduction failure.

[0006] Therefore, how to improve the complete and simultaneous fitting of the heat dissipation device with the heat source with uniform pressure, and how to provide appropriate binding force between the bare chip and the heat dissipation device and repeat the installation or adjustment, is the primary problem to be solved by the industry. SUMMARY

[0007] Therefore, in order to effectively solve the above problems, the main purpose of the present application is to provide a binding element of a heat dissipation unit and a heat dissipation unit, which can provide a synchronous and uniform downward pressure of the heat dissipation unit to the bare chip type heat source, effectively avoiding the phenomenon of single locking point first locking, causing the edge of the bare chip type heat source to break or crack.

[0008] The present application provides a binding element of a heat dissipation unit, characterized in that it comprises:

[0009] A screw having a screw head at the upper end and a plurality of external threads formed at the lower end, a buckle ring provided adjacent to the plurality of external threads, a spring sleeve provided outside the screw, the spring having a top end and a bottom end, the bottom end abutting the buckle ring;

[0010] A sleeve having an upper end, a lower end and a containing space, the containing space being in communication with the upper end and the lower end, at least one notch in the sleeve near the upper end in communication with the containing space, the screw with the spring being arranged in the containing space of the sleeve;

[0011] A clamping ring arranged at the upper end of the sleeve, the lower edge of the clamping ring being provided with an extension downward, the extension being curled in the center direction of the clamping ring with at least one tongue, the tongue being inserted into the containing space from the notch of the sleeve to press and clamp the top end of the spring, so that the spring is in a compressed state.

[0012] The binding element of the heat dissipation unit, wherein: the notch has an upper edge, the tongue has an upper surface and a lower surface, the upper surface of the tongue is supported at the upper edge of the notch, and the lower surface of the tongue is supported by the top end of the spring, and the spring is compressed and limited in the containing space of the sleeve by the tongue.

[0013] The binding element of the heat dissipation unit, wherein: the tongue is curled.

[0014] The coupling element of the heat dissipation unit, wherein the outer surface of the clamping ring has at least one protrusion for rotating the clamping ring.

[0015] To achieve the above object, the present application provides a heat dissipation unit, characterized in that it comprises:

[0016] a heat dissipation unit body having an upper surface, a lower surface, at least four through holes and a heat receiving area, the at least four through holes penetrating the upper and lower surfaces of the heat dissipation unit body and being located at four corners of the periphery of the heat receiving area, and the at least four through holes being respectively provided with a coupling element;

[0017] The coupling element has a screw, the upper and lower ends of the screw respectively having a nut head and a plurality of external threads, the external threads of the screw being provided with a clasp after penetrating the through hole of the body, one side surface of the clasp being attached to the lower surface of the heat dissipation unit body, and a spring being sleeved on the outside of the screw, the spring having a top end and a bottom end;

[0018] a sleeve having an upper end, a lower end and a containing space, the containing space being respectively communicated with the upper end and the lower end, at least one gap being provided in the sleeve near the upper end and communicating with the containing space, the screw provided with the spring being arranged in the containing space of the sleeve, and the lower end of the sleeve and the bottom end of the spring being arranged on the upper surface of the heat dissipation unit body;

[0019] a clamping ring arranged on the upper end of the sleeve, the lower edge of the clamping ring being provided with an extension downward, the extension being curled in the direction of the center of the clamping ring and provided with at least one tongue, the tongue being inserted into the containing space from the gap of the sleeve and being used to press and lock the top end of the spring, so that the spring is in a compressed state in the sleeve.

[0020] The heat dissipation unit, wherein the tongue of the clamping ring can rotate the clamping ring clockwise or counterclockwise, so that the tongue is inserted into or withdrawn from the containing space of the sleeve from the gap of the sleeve.

[0021] The heat dissipation unit, wherein the gap has an upper edge, the tongue has an upper side surface and a lower side surface, the upper side surface of the tongue is supported on the upper edge of the gap, and the lower side surface of the tongue is supported by the top end of the spring, so that the spring is compressed and limited in the containing space of the sleeve by the tongue.

[0022] The heat dissipation unit, wherein the tongue is curled, and the outer surface of the clamping ring has at least one protrusion for rotating the clamping ring.

[0023] When in use, the heated area of the heat dissipation unit body is arranged corresponding to the bare chip type heat source, and then the outer thread of one end of the screw of the fixing unit is screwed with the substrate provided with the bare chip type heat source to preliminarily position the screw, at this time, the springs are still compressed in the internal space of the sleeve, after the fixing units at four corners are preliminarily positioned by screwing, the tongue is withdrawn (moved) out of the notch of the sleeve by rotating the clamping ring, and the pressure of the top end of the tongue on the spring is removed, so that the springs provide synchronous and uniform downward pressing force on the four corners of the heat dissipation unit body, so that the heat dissipation unit body and the bare chip type heat source can stably and closely contact, and the situation of uneven stress leading to corner breakage or collapse or heat resistance due to incomplete adhesion can be avoided, and the situation of excessive downward pressure during screwing leading to damage of the heat source (bare chip) can also be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A combination diagram of the prior art heat dissipation unit and bare chip.

[0025] Figure 2 A combination diagram of the prior art heat dissipation unit and bare chip.

[0026] Figure 3 A combination diagram of the prior art heat dissipation unit and bare chip.

[0027] Figure 4 A combination diagram of the prior art heat dissipation unit and bare chip.

[0028] Figure 5 A combination diagram of the prior art heat dissipation unit and bare chip.

[0029] Figure 6 A combination diagram of the prior art heat dissipation unit and bare chip.

[0030] Figure 7 A combination diagram of the prior art heat dissipation unit and bare chip.

[0031] BRIEF DESCRIPTION OF DRAWINGS: combination element 1; screw 11; screw head 111; equal external thread 112; ring type groove 113; sleeve 12; upper end 121; lower end 122; accommodating space 123; notch 124; upper edge 1241; clamping ring 13; tongue 132; inner edge surface 1321; upper side surface 1322; lower side surface 1323; convex part 133; spring 14; top end 141; bottom end 142; clamping ring 15; heat dissipation unit 2; heat dissipation unit body 21; upper surface 211; lower surface 212; through hole 213; heated area 214; bare chip type heat source 3; fixing structure 4. DETAILED DESCRIPTION

[0032] The above objects of the present application and its structural and functional characteristics will be illustrated with reference to the preferred embodiments of the attached drawings.

[0033] Please refer to Figure 3 、 Figure 4 , the combination element of the heat dissipation unit is exploded and assembled, as shown in the figure, the combination element of the heat dissipation unit comprises a screw 11, a spring, a sleeve 12, and a clamping ring 13.

[0034] The upper and lower ends of the screw 11 are respectively provided with a nut head 111 and a plurality of external threads 112, and an annular groove 113 is arranged above the screw 11 adjacent to the plurality of external threads 112, the annular groove 113 is provided with a buckle ring 15, the buckle ring 15 can be an E-shaped or C-shaped buckle ring, the spring 14 is sleeved outside the screw 11, the spring 14 is provided with a top end 141 and a bottom end 142 at both ends, the bottom end 142 abuts one side of the buckle ring 15, and the buckle ring 15 provides a limit for the spring 14 axially downward, preventing the spring 14 from being separated from the screw 11 at one end of the screw 11 having a plurality of external threads 112.

[0035] The sleeve 12 is a pipe body with a containing space 123 inside, the upper and lower ends of the sleeve 12 are respectively provided with an open upper end 121 and a lower end 122, the containing space 123 is between the upper and lower ends and is in communication with the upper end 121 and the lower end 122, at least one strip-shaped notch 124 is arranged inwardly near the upper end 121 of the sleeve 12, the notch 124 is in communication with the containing space 123, the screw 11 and the spring 14 are arranged in the containing space 123 of the sleeve 12.

[0036] The clamping ring 13 is a ring body (or a circular body), which can be directly or spacedly arranged at the upper end 121 of the sleeve 12, and is movably rotatable with the sleeve 12, the inner diameter of the clamping ring 13 is greater than or equal to the outer diameter of the sleeve 12, in the embodiment of the present application, the inner diameter of the clamping ring is greater than the outer diameter of the sleeve, an extension is arranged downwardly at the lower side edge of the clamping ring 13, at least one tongue 132 is curled inwardly from the center of the clamping ring 13, the tongue 132 can be curled and extended in a clockwise or counterclockwise direction to the center of the clamping ring 13, and the tongue 132 is inserted into the containing space 123 from the notch 124 of the sleeve 12 to press and buckle the top end 141 of the spring 14, so that the spring 14 is in a compressed state in the sleeve 12.

[0037] The tongue 132 can be single or multiple pairs of corresponding arrangement, respectively by clockwise and counterclockwise way to the center of the card ring 13 curling, the tongue 132 is a curl ring (convolution) shape, and the tongue 132 has an inner edge surface 1321, when rotating the card ring 13, the tongue 132 from the sleeve 12 gap 124 into (stretch) or out of the sleeve 12 containing space 123.

[0038] In addition, the extension of the card ring 13 outside can have at least one convex portion 133, can be more convenient to rotate the card ring 13 rotation force or provide corresponding tools or jig combination use, said card ring 13 tongue 132 can be through the clockwise or counterclockwise rotation of the card ring 13, make the tongue 132 can be from the sleeve 12 gap 124 into or out of the sleeve 12 containing space 123.

[0039] The gap 124 of the sleeve 12 has an upper edge 1241, the tongue 132 has an upper surface 1322 and a lower surface 1323, the upper surface 1322 of the tongue 132 is limited by the upper edge 1241 of the gap 124, the lower surface 1323 of the tongue 132 is pressed on the top end 141 of the spring 14, the spring 14 is compressed and limited in the containing space 123 of the sleeve 12.

[0040] Please refer to Figure 5 、 Figure 6 、 Figure 7 , the three-dimensional exploded view of the heat dissipation unit and the action schematic diagram, as shown in the figure, the present application provides a kind of before-mentioned combination element 1 to provide heat dissipation unit 2 and bare crystal type heat source 3 between can have uniform adhesion and pressing force, this embodiment because of the combination of the combination element 1 described above is applied to the heat dissipation unit 2 provides and bare crystal type heat source 3 generates uniform force adhesion effect, and because the foregoing description embodiment has carried out the complete explanation of the combination element 1, the detailed structure of the components of the combination element 1 will not be described in this embodiment.

[0041] The heat dissipation unit 2 has a heat dissipation unit body 21, the upper and lower sides of the heat dissipation unit body 21 are respectively provided with an upper surface 211 and a lower surface 212, and at least four through holes 213 and a heated area 214 are provided, the heated area 214 is provided on the lower surface 212 of the heat dissipation unit body 21 close to the center, the at least four through holes 213 are located at the four corners of the periphery of the heated area 214 and penetrate the upper and lower surfaces 211, 212 of the heat dissipation unit body 21, the at least four through holes 213 are respectively provided with the aforementioned combination element 1, the combination element 1 is penetrated by the external thread 112 of one end of the screw 11, the through hole 213 is penetrated, and then the clasp ring 15 is clamped in the ring-shaped groove 113, so that the upper side surface of the clasp ring 15 is attached to the lower surface 212 of the heat dissipation unit body 21 to prevent the screw 11 from being pulled out of the through hole 213 axially.

[0042] The screw 11 and the spring 14 are arranged in the accommodating space 123 of the sleeve 12, the upper end 141 of the spring 14 is compressed and limited inside the accommodating space 123 of the sleeve 12 due to the pressing of the tongue 132 of the clamping ring 13, and the lower end 122 of the sleeve 12 is arranged together with the bottom end 142 of the spring 14 on the upper surface 211 of the heat dissipation unit body 21, so that the combination element 1 is arranged on the heat dissipation unit body 21. The sleeve 12 can also be directly formed integrally on the upper surface 211 of the heat dissipation unit body 21, and the remaining components are sequentially combined with the sleeve 12 by insertion or sleeving.

[0043] When the heat dissipation unit 2 is used to provide the heat source 3 in the bare die form (heat exchange or heat conduction), the plurality of external threads 113 of the combination element 1 are used to preliminarily and preliminarily lock the fixed structure 4 (threaded stud with internal thread) on the substrate loaded with the heat source 3 in the bare die form, at this time, the spring 14 sleeved outside the screw 11 has not released its elastic force, the heat dissipation unit 2 is only lightly placed above the heat source 3 in the bare die form, and does not have any pressure on the heat source 3 in the bare die form, that is, the surface (lower surface) of the heated area 214 of the heat dissipation unit 2 only lightly touches the upper surface of the heat source 3 in the bare die form. In order to enable the heat dissipation unit 2 to provide synchronous and uniform downward pressure on the heat source 3 in the bare die form, the combination element 1 arranged at the four corners outside the heated area 214 of the heat dissipation unit 2 must simultaneously and synchronously release the compressed spring 14, so as to provide uniform downward pressure on the heat source 3 in the bare die form.

[0044] Thus, in order to simultaneously and synchronously release the spring 14 of each coupling element 1 compressed within the sleeve 12, and further synchronously release the compressed spring force thereof, the clockwise or counterclockwise rotation operation of the clamping ring 13 on each coupling element 1 can be performed synchronously by an automatic device (not shown) or by manual operation with a hand tool in a rotating manner, so that the tongues 132 of all clamping rings 13 synchronously release the limiting pressure on the spring 14, so that all springs 14 simultaneously recover their upward supporting and downward pressing force, providing a uniform downward force on the heat source 3 of the bare die type. Therefore, the heat dissipation unit 2 of the present application can provide the heat source 3 of the bare die type with a comprehensive synchronous and uniform downward force, which improves the uneven force caused by the existing single locking point, which forces the bare die to be damaged.

Claims

1. A connecting element for a heat dissipation unit, characterized in that, It includes: A screw has a nut head at its upper end and a plurality of external threads at its lower end. A retaining ring is provided above the plurality of external threads on the screw. A spring is sleeved on the outside of the screw. The spring has a top end and a bottom end, and the bottom end abuts against the retaining ring. A sleeve has an upper end, a lower end and a receiving space, the receiving space being connected to the upper end and the lower end respectively. Near the upper end, the sleeve is recessed inward with at least one notch communicating with the receiving space. The screw through which the spring passes is disposed in the receiving space of the sleeve. A retaining ring is provided at the upper end of the sleeve. The lower edge of the retaining ring has an extension that extends downward. The extension is curled toward the center of the retaining ring and has at least one tongue. The tongue extends into the receiving space through the notch of the sleeve and is used to press and lock the top of the spring, so that the spring is in a compressed state.

2. The connecting element of the heat dissipation unit as described in claim 1, characterized in that: The notch has an upper edge, and the tongue has an upper surface and a lower surface. The upper surface of the tongue abuts against the upper edge of the notch, and the lower surface of the tongue is abutted against by the top of the spring. The spring is compressed and confined within the accommodating space of the sleeve by the tongue.

3. The connecting element of the heat dissipation unit as described in claim 1, characterized in that: The tongue is curled.

4. The connecting element of the heat dissipation unit as described in claim 1, characterized in that: The outer surface of the retaining ring has at least one protrusion, which allows the retaining ring to be rotated.

5. A heat dissipation unit, characterized in that, It includes: A heat dissipation unit body has an upper surface, a lower surface, at least four through holes and a heat-receiving area. The at least four through holes penetrate the upper and lower surfaces of the heat dissipation unit body and are located at the four corners of the periphery of the heat-receiving area. Each of the at least four through holes is provided with a connecting element. The connecting element has a screw, with a nut head and a plurality of external threads at the upper and lower ends of the screw, respectively. After the external threads of the screw pass through the through hole of the body, a retaining ring is provided. One side surface of the retaining ring is attached to the lower surface of the heat dissipation unit body. A spring is sleeved on the outside of the screw, and the spring has a top end and a bottom end. A sleeve has an upper end, a lower end and a receiving space, the receiving space being connected to the upper end and the lower end respectively. Near the upper end, the sleeve is recessed inward with at least one notch communicating with the receiving space. The screw with the spring is disposed in the receiving space of the sleeve. The lower end of the sleeve and the bottom end of the spring abut against the upper surface of the heat dissipation unit body. A retaining ring is provided at the upper end of the sleeve. The lower edge of the retaining ring has an extension that extends downward. The extension is curled toward the center of the retaining ring and has at least one tongue. The tongue extends into the receiving space through the notch of the sleeve and is used to press and lock the top of the spring, so that the spring is in a compressed state inside the sleeve.

6. The heat dissipation unit as described in claim 5, characterized in that: The tongue of the retaining ring can rotate the retaining ring clockwise or counterclockwise, allowing the tongue to extend into or retract from the receiving space of the sleeve through the notch.

7. The heat dissipation unit as described in claim 5, characterized in that: The notch has an upper edge, and the tongue has an upper surface and a lower surface. The upper surface of the tongue abuts against the upper edge of the notch, and the lower surface of the tongue is abutted against by the top of the spring. The spring is compressed and confined within the accommodating space of the sleeve by the tongue.

8. The heat dissipation unit as described in claim 5, characterized in that: The tongue is curled, and the outer surface of the retaining ring has at least one protrusion that allows the retaining ring to be rotated.

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