Patent ID: 12237184

DETAILED DESCRIPTION

Reference will now be made in detail to exemplary embodiments of the disclosure, which are illustrated in the accompanying drawings. Obviously, the described embodiments are just some of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of this disclosure.

The present disclosure provides a heating structure of a wafer test device. As shown inFIG.1, in one embodiment, the wafer test device may include the heating structure100and a clamp. The heating structure100may be located below the clamp. The heating structure100may include a heating base10, a mounting component20and a plurality of insulating thermo-conductive blocks30. A heating element may be provided inside the heating base10. The mounting component20may be located above the heating base10, and may be provided with a plurality of mounting stations21arranged at intervals. Each insulating thermo-conductive block30of the plurality of insulating thermo-conductive blocks30may be disposed at one corresponding mounting station21and protrude from the mounting component20to contact the clamp. In one embodiment, the wafer may be located on a base of the clamp, and the heating base10may be located below the clamp to heat the wafer in the clamp. The plurality of insulating thermo-conductive blocks30may be installed on the plurality of mounting stations21on the mounting component20. The plurality of insulating thermo-conductive blocks30may be arranged at intervals, and may protrude upward relative to the mounting component20to contact the clamp. The protrusion amount of the plurality of insulating thermo-conductive blocks30relative to the mounting component20may be set to any value between 5.0 mm and 10.0 mm according to actual needs. In one embodiment, the protrusion amount of the plurality of insulating thermo-conductive blocks30relative to the mounting component20may be set to 8.0 mm.

In this embodiment, the plurality of mounting stations may be set on the mounting component20, and the plurality of insulating thermo-conductive blocks30may be installed on the plurality of mounting stations21. Each of the plurality of insulating thermo-conductive blocks30may protrude relative to the mounting component20, such that the plurality of insulating thermo-conductive blocks30contacts with the clamp to avoid generation of high voltage power because of direct contact between the mounting component20and the clamp. Further, when a single piece of insulating thermo-conductive block30with the same or similar size as the mounting component20is placed directly above the mounting component20as a whole, the insulating thermo-conductive block30is prone to uneven heating and may cause fragmentation. Therefore, in the present embodiment, the plurality of insulating thermo-conductive blocks30may be adopted to prevent the plurality of insulating thermo-conductive blocks30from being broken.

In one embodiment, the plurality of mounting stations21of the mounting component20may be evenly arranged, such that the plurality of insulating thermo-conductive blocks30are evenly arranged on the mounting component20. The clamp may be in direct contact with the plurality of insulating thermo-conductive blocks30protruding from the mounting component20, and the heat generated by the heating base10may be transferred to the clamp through the plurality of insulating thermo-conductive blocks30. By disposing the plurality of insulating thermo-conductive blocks30on the plurality of mounting stations21of the mounting component20, the clamp may be evenly heated to avoid temperature deviation of the clamp.

In one embodiment, as shown inFIG.2illustrating an exemplary mounting component of the heating structure, the mounting component20, the plurality of mounting stations21and the plurality of insulating thermo-conductive blocks30may be all circular in shape. One insulating thermo-conductive block30of the plurality of insulating thermo-conductive blocks30may be located at a center of the mounting component20, and other insulating thermo-conductive blocks30may be evenly arranged in the circumferential direction of the insulating thermo-conductive block30at the center of the mounting component20. In the present embodiment, the plurality of insulating thermo-conductive blocks30with circular shapes may be installed on the plurality of mounting station21with circular shapes of the circular mounting component20. One insulating thermo-conductive block30of the plurality of insulating thermo-conductive blocks30may be located at a center of the mounting component20, and other insulating thermo-conductive blocks30may be evenly arranged in the circumferential direction of the insulating thermo-conductive block30at the center of the mounting component20. That is, the plurality of insulating thermo-conductive blocks30may be evenly distributed in a petal shape on the mounting component20, and distances from the plurality of insulating thermo-conductive blocks30arranged along the circumference to the center position of the heating structure100may be equal. This arrangement may help the heat of the plurality of insulating thermo-conductive blocks30to be evenly transferred to various parts of the clamp such that the clamp is evenly heated, and also may improve the heat transfer efficiency of the plurality of insulating thermo-conductive blocks30.

In another embodiment, as shown inFIG.3illustrating another exemplary mounting component of the heating structure, the plurality of mounting station21and the plurality of insulating thermo-conductive blocks30may be fan-shaped. The plurality of insulating thermo-conductive blocks30in a fan shape may be evenly arranged along the center of the mounting member20, and the distances between each of the plurality of insulating thermo-conductive blocks30and the center position of the heating structure100may be equal. This arrangement may improve the heat transfer efficiency of the plurality of insulating thermo-conductive blocks30, and may also help the heat of the plurality of insulating thermo-conductive blocks30to be evenly transferred to various parts of the clamp such that the clamp is evenly heated, to achieve high-temperature aging testing of wafers at 175-200° C.

FIG.4illustrates a cross-sectional view of the hating structure andFIG.5illustrates a partially enlarged view of point A inFIG.4, the wafer test device may further include a plurality of graphite pads40. Each of the plurality of graphite pads40may be arranged corresponding to one of the plurality of insulating thermo-conductive blocks30. Each of the plurality of graphite pads40may be located below the corresponding insulating thermo-conductive block30of the plurality of insulating thermo-conductive blocks30. The plurality of graphite pads40may have a certain thickness, and may be able to be compressed to a certain amount and fill gaps of the contact surfaces between the plurality of insulating thermo-conductive blocks and the heating base10. The plurality of graphite pads40may be a good conductor of heat, and may be conducive to improving the heat transfer efficiency between the heating base10and the plurality of insulating heat conducting blocks30. Further, the small amount of compression of the plurality of graphite pads40may also make the upper surfaces of the plurality of insulating heat conducting blocks30flush and avoid low heat transfer efficiency because of uneven surfaces of the plurality of insulating thermo-conductive blocks30.

In this embodiment, the thickness of the plurality of graphite pads40may be any value in the range of 0.8 mm-1.5 mm. The plurality of graphite pads40may be installed on the lower surfaces of the plurality of insulating thermo-conductive blocks, which is simple and convenient. The thickness of 0.8-1.5 mm may be moderate, which may meet the heat transfer requirements and may have little impact on the accommodation space at the plurality of mounting stations21. In one embodiment, the thickness of the plurality of graphite pads40may be set to 1.0 mm. In other embodiments, the thickness of the plurality of graphite pads40may be set according to actual needs.

In one embodiment, the plurality of mounting stations21may be hole-shaped, and a portion of each of the plurality of insulating thermo-conductive blocks30may be disposed inside one corresponding mounting station21of the plurality of mounting stations21. Each of the plurality of graphite pads40may be located inside one corresponding mounting station21and the lower surface may be in contact with the heating base10. It can be understood that the plurality of mounting stations21may be openings located on the surface of the mounting component20, and the plurality of insulating thermo-conductive blocks30may protrude from the mounting component20. A portion of each of the plurality of insulating thermo-conductive blocks30may be disposed inside one corresponding mounting station21of the plurality of mounting stations21, and another portion may be located outside the corresponding mounting station21and may be in contact with the clamp. Each of the plurality of graphite pads40may be located inside one corresponding mounting station21and between the heating base10and one corresponding insulating thermo-conductive block30. The upper surface of each graphite pad40may be in contact with the corresponding insulating thermo-conductive block30and the lower surface may be in contact with the heating base10, to improve the heat transfer efficiency between the heating base10and the plurality of insulating thermo-conductive blocks30.

In one embodiment, a lower edge of an outer wall in one insulating thermo-conductive block30of the plurality of insulating thermo-conductive blocks30may be provided with a protruding clamping component31, and an upper edge of a side wall of one corresponding mounting station21may be provided with a protruding limiting component22. The limiting component22may cooperate with the clamping component31to limit the position of the insulating thermo-conductive block30. In one embodiment, the protruding limiting component22at the upper edge of the side wall of the mounting station21may cooperate with the protruding clamping component31at the lower edge of the outer wall of the insulating thermo-conductive block30to limit the vertical position of the insulating thermo-conductive block30. Therefore, the insulating thermo-conductive block30may be fixed on the mounting component20to prevent the insulating thermo-conductive block30from being displaced. There may be a certain gap between the limiting component22and the clamping component31to reserve a certain space for accommodating one corresponding graphite pad40.

In one embodiment, the plurality of insulating thermo-conductive blocks30may be ceramic pads. The ceramic pads may have fast heating speed and heat transfer speed, and the plurality of graphite pads40may have fast heat conduction and good heat conduction effect. By adding the plurality of graphite pads40at the bottom of the ceramic pads, the ceramic pads and the plurality of graphite pads40may cooperate to make the wafer in the clamp be more evenly heated, and may also effectively conduct heat to prevent the heat energy from moving away from the clamp, improving the overall heat utilization rate of the heating base10.

The present disclosure also provides a wafer test device. The wafer test device may include any heating structure100provided by various embodiments of the present disclosure.

In the present disclosure, the plurality of mounting stations may be set on the mounting component20, and the plurality of insulating thermo-conductive blocks30may be installed on the plurality of mounting stations21. Each of the plurality of insulating thermo-conductive blocks30may protrude relative to the mounting component20, such that the plurality of insulating thermo-conductive blocks30contacts with the clamp to avoid generation of high voltage power because of direct contact between the mounting component20and the clamp. Further, the plurality of insulating thermo-conductive blocks30may be adopted instead of a single piece of an insulating thermo-conductive block, to prevent the plurality of insulating thermo-conductive blocks30from being broken.

The embodiments disclosed herein are exemplary only. Other applications, advantages, alternations, modifications, or equivalents to the disclosed embodiments are obvious to those skilled in the art and are intended to be encompassed within the scope of the present disclosure.