阅读说明：本技术 一种高热流密度器件 (High heat flux density device ) 是由 李建卫 陈宇 于 2021-09-27 设计创作，主要内容包括：本发明公开了一种高热流密度器件,包括热扩展元件,热扩展元件通过多个焊接件与芯片的芯片结相连,芯片连接在封装基板上；芯片与热扩展元件形状规格相适配,贴合热扩展元件内侧壳体,热扩展原件内部设有真空腔体和毛细结构。本发明与现有技术相比的优点在于：对芯片热量过于集中的问题进行改善,降低芯片热流密度同时避免较高的成本,进而提升提升芯片的功作效率；次要目的减小芯片热量传输到外部热阻,在对芯片进行散热时更快的将芯片内的热量传输出去。(The invention discloses a high heat flux device, which comprises a heat expansion element, wherein the heat expansion element is connected with a chip junction of a chip through a plurality of welding pieces, and the chip is connected on a packaging substrate; the chip is matched with the shape and the specification of the heat expansion element and is attached to the shell on the inner side of the heat expansion element, and a vacuum cavity and a capillary structure are arranged inside the heat expansion element. Compared with the prior art, the invention has the advantages that: the problem of over-concentration of the heat of the chip is solved, the heat flux density of the chip is reduced, high cost is avoided, and the work efficiency of the chip is improved; the secondary purpose is to reduce the heat transfer from the chip to the external thermal resistance and to transfer the heat in the chip out more quickly when the chip is cooled.)

1. A high heat flux device comprising a heat spreading element (4), characterized in that: the heat spreading element (4) is connected with a chip junction (5) of the chip (1) through a plurality of welding pieces (3), and the chip (1) is connected on the packaging substrate (2); chip (1) and thermal expansion component (4) form and specification looks adaptation, the inboard casing of laminating thermal expansion component (4), thermal expansion component (4) inside is equipped with vacuum cavity and capillary structure (6).

2. A high heat flux device in accordance with claim 1 wherein: the heat expansion element (4) adopts a welding connection mode, the chip (1) adopts a packaging mode, and the heat expansion element (4) is tightly attached to the chip (1) so that waste heat generated by the chip (1) can be expanded on the surface of the whole heat expansion element (4).

Technical Field

The invention relates to a chip, in particular to a high heat flux device.

Background

In the development process of a chip, the integration level of the chip is higher and higher, the size of the chip is smaller and smaller, the corresponding power is higher and higher, the heat generated by the chip is higher and higher, the heat flux density on the surface of the chip is higher and higher, and the temperature difference between a chip node and a packaging shell is larger and larger; on one hand, the waste heat generated by the chip is large, and on the other hand, the heat resistance for transmitting the chip waste heat out of the external heat dissipation is higher in the chip packaging; the traditional plastic packaging can not meet the development trend requirements of chips; the high-purity base material packaged by ceramics, the ceramic sintering equipment and the process thereof are greatly different from the international technology at present.

Disclosure of Invention

The invention aims to solve the technical problems that the packaging mode of the chip at present is insufficient, so that the packaging efficiency of the chip is low, the chip product is reduced, and the production requirement is not met.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a high heat flux device comprises a heat spreading element connected with chip junctions of a chip by a plurality of welding parts, wherein the chip is connected on a packaging substrate; the chip is matched with the shape and the specification of the heat expansion element and is attached to the shell on the inner side of the heat expansion element, and a vacuum cavity and a capillary structure are arranged inside the heat expansion element.

Compared with the prior art, the invention has the advantages that: the problem of over-concentration of the heat of the chip is solved, the heat flux density of the chip is reduced, high cost is avoided, and the work efficiency of the chip is improved; the secondary purpose is to reduce the heat transfer from the chip to the external thermal resistance and to transfer the heat in the chip out more quickly when the chip is cooled.

As an improvement, the heat expansion element adopts a welding connection mode, the chip adopts a packaging mode, and the heat expansion element and the chip are tightly attached to expand the waste heat generated by the chip on the surface of the whole heat expansion element.

Drawings

Fig. 1 is a schematic diagram of a chip package for a high heat flux device.

Fig. 2 is a schematic view of a soldering of a high heat flux device.

Fig. 3 is a schematic view of the internal structure of a high heat flux device.

As shown in the figure: 1. chip, 2, packaging substrate, 3, welding part, 4, heat spreading element, 5, chip junction, 6 and capillary structure.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In specific implementation of the invention, the high heat flux density device comprises a heat expansion element 4, wherein the heat expansion element 4 is connected with a chip junction 5 of a chip 1 through a plurality of welding pieces 3, and the chip 1 is connected on a packaging substrate 2; chip 1 and the adaptation of 4 shape specifications of thermal expansion component, the inboard casing of 4 of laminating thermal expansion component, the inside vacuum cavity and the capillary structure 6 that are equipped with of thermal expansion component 4.

The heat expansion element 4 adopts a welding connection mode, the chip 1 adopts a packaging mode, and the heat expansion element 4 is tightly attached to the chip 1 so that waste heat generated by the chip 1 can be expanded on the surface of the whole heat expansion element 4.

The working principle of the invention is as follows: the present application aims to provide a packaging technical scheme for a high heat flux device, which is used for improving the over-concentration of chip heat, and by means of the angle of the innovative packaging scheme, the heat flux density of a chip is reduced while higher cost is avoided, thereby improving the work efficiency of the chip; the secondary purpose is to reduce the heat transfer from the chip to the external thermal resistance and to transfer the heat in the chip out more quickly when the chip is cooled.

The packaging material in the technical scheme of the heat flux density device packaging is a high-heat-conduction expansion element, a vacuum structure with a capillary structure is arranged in the heat expansion element, high-purity liquid is stored in the internal capillary structure, vapor-liquid phase change can be carried out on the condition that the temperature can be effectively worked at the temperature of water which is much lower than the boiling point under the normal pressure after heat absorption, the vapor can be changed into liquid from the vapor state in case of cooling, heat release or heat absorption is realized in the vapor-liquid phase change process, extra mechanical work is not needed in the whole process, the heat expansion element has the temperature equalizing effect of diffusing heat from the point to the surface due to the vapor-liquid phase change process, the effective heat conduction coefficient W/mk is higher than that of the heat expansion element, and the heat resistance of the heat expansion element body can be reduced to the temperature of the temperature-W/DEG C.

The high-thermal-conductivity extension element can be manufactured into a high-thermal-conductivity extension element matched with the chip according to the size of the chip, and the chip is packaged by welding the high-thermal-conductivity extension element; the element and the chip are tightly attached, waste heat generated by the chip can be expanded to the top surface and the bottom surface of the chip array and the surface of the whole heat expansion element surrounded by the periphery of the chip array, and then heat is dissipated to the environment by combining with an externally allowed space; meanwhile, according to the packaging scheme, according to the requirement of chip heat dissipation, the size of the heat conduction expansion element can be adjusted structurally through special design and processing on the performance of the heat conduction expansion element, so that the chip with higher heat flux density can be suitable; the high-heat-conduction expansion element can realize heat extraction and heat dissipation of devices with heat flow density reaching W/cm, and the W/cm and W/cm heat expansion elements are successfully developed at present; meanwhile, according to the packaging scheme, different packaging modes can be carried out according to the requirements of chip manufacturers, the wires of the chips are connected out on the substrate, and the packaging scheme can be used for packaging the upper surface, the front surface, the rear surface, the left surface and the right surface and is suitable for more application scenes.

The chip packaging structure is not limited to chip packaging, and can be applied to different heating elements, but the structure and the principle are unchanged.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the invention, "plurality" means two or more unless explicitly specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description herein, reference to the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.