CN218956726U - Welding spot thermomigration test equipment and sample bearing structure thereof - Google Patents
Welding spot thermomigration test equipment and sample bearing structure thereof Download PDFInfo
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Abstract
The utility model belongs to the technical field of welding spot thermomigration tests, and particularly relates to a sample bearing structure of welding spot thermomigration test equipment, in particular to welding spot thermomigration test equipment and a sample bearing structure thereof.
Description
Technical Field
The utility model belongs to the technical field of welding spot thermomigration tests, and particularly relates to a sample bearing structure of welding spot thermomigration test equipment.
Background
With the deep development of informatization, the intelligent electronic products with high efficiency and portability are widely applied to various industries and daily life of people. The solder joint plays an important role in electric connection, mechanical connection and heat dissipation channels as an important component of the electronic packaging product. In order to meet the demands of people on production and life, the size of electronic products is reduced, the integration density is improved, the intelligent degree is improved, the number of welding spots in unit area is increased in geometric multiple, the size of the welding spots is reduced to micro-nano level, and the welding spots are in the severe environments of larger current density, temperature load and mechanical load in the electrifying process. Therefore, the research of the reliability of the welding spots becomes an important research field of the microelectronics industry.
The solder joint reliability is closely related to the failure behavior of the solder joint. The failure behavior of the micro welding spots in the service process mainly comprises the following steps: thermal shock failure, creep failure, electromigration failure, and aging failure. The reduction of the size of the welding spot leads to the increase of the geometric multiple of the current passing through the unit area of the welding spot, so that the critical condition of electromigration is more easily reached, and electromigration failure becomes an important part of the reliability of the micro welding spot. The thermal migration caused by the electromigration is mass migration caused by temperature gradient difference inside the material, in the process of electromigration of micro welding spots, the difference of high current density and IMC (namely, a layer of metal compound formed by the actions of bonding, infiltration, migration, diffusion and the like between a welding material atom and a welded metal atom under the condition of enough heat between the welding material atom and the welded metal atom) causes the difference of joule heat generated by cathode and anode, the smaller the size of the welding spots, the very large temperature gradient difference (for example, the thickness of a brazing seam is 10 mu m, and the temperature gradient of 1000 ℃/cm can be generated if the temperature is 1 ℃). The large temperature gradient leads to directional migration of atoms in the welding spot, so that the internal structure of the welding spot is damaged. As the size of the solder joint decreases, the current density and the temperature gradient become larger and larger, and research on the phenomenon of thermal migration in the micro solder joint becomes one of the important directions for research on the reliability of the solder joint.
The prior art has a test apparatus for setting heat sources at both the hot end and the cold end of a test sample to achieve a constant temperature gradient at both ends of a solder joint, such as an apparatus for detecting the thermal migration performance of an interconnect solder joint disclosed in patent document with application publication No. CN105606647a, which includes a hot end heat source (i.e., a heating plate in this patent) and a cold end heat source (i.e., a semiconductor refrigeration sheet in this patent). And heat conducting plates are arranged above the hot end heat source and below the cold end heat source, and a sample to be tested is placed between the two heat conducting plates. The upper heat conducting plate transfers the heat of the cold end heat source to the sample, and the lower heat conducting plate transfers the heat of the hot end heat source to the sample, so that the hot end and the cold end of the sample reach the set temperature, and the temperature gradient at the two ends of the welding spot on the sample reaches the preset value. Although the device can make the hot junction and the cold junction of sample reach the settlement difference in temperature, but go up heat conduction board and lower heat conduction board and adopt the mode fixed sample of centre gripping, need design drive arrangement in order to make two heat conduction boards relative motion in order to centre gripping sample to need set up the slot that the thermocouple was installed on two heat conduction boards, overall structure is comparatively complicated, and sample loading and unloading are inconvenient. In addition, heat needs to be transferred to the sample through the heat conducting plate, so that temperature changes of the cold-end heat source and the hot-end heat source cannot be reflected on the sample in time, accuracy of test results is affected, and test efficiency is low.
In the prior art, constant temperature gradients at two ends of a welding spot are realized by adopting oil bath and environmental temperature change in patent documents with application publication numbers of CN107063891A and CN107064571A respectively, but samples are clamped by clamping devices in both patent documents, so that the samples are inconvenient to assemble and disassemble and are easy to deform. In addition, a plurality of samples are generally required to be arranged in a thermomigration test, and the existing clamping structure can only be suitable for a single sample, so that a plurality of clamping devices are required to be arranged, and the clamping devices are required to be assembled and disassembled one by one in use, so that the test efficiency is affected.
Disclosure of Invention
The utility model aims to provide a welding spot thermomigration test device, which aims to solve the technical problem that test efficiency is low due to the fact that a sample is inconvenient to assemble and disassemble in the thermomigration test device in the prior art. The utility model also provides a sample bearing structure of the welding spot thermomigration test equipment, so as to solve the technical problems.
In order to achieve the above purpose, the technical scheme of the solder joint thermal migration test equipment provided by the utility model is as follows: a thermal migration test device for welding spots comprises a device main body, wherein a cold-end heat source and a hot-end heat source for enabling two sides of a welding spot of a sample to reach corresponding temperatures are arranged on the device main body, and a thermocouple device for detecting the temperature of two sides of the welding spot of the sample is arranged on the device main body; the cold end heat source and the hot end heat source are arranged at intervals along the horizontal direction and are respectively provided with a sample supporting area for supporting different sides of the sample to finish loading of at least one sample, the welding spot thermal migration test equipment further comprises a counter force bearing seat which is fixedly arranged relative to the cold end heat source and the hot end heat source, the counter force bearing seat is provided with a cold end probe compressing structure and a hot end probe compressing structure, the cold end probe compressing structure is used for compressing a corresponding thermocouple probe on the cold end of the corresponding at least one sample, the hot end probe compressing structure is used for compressing the corresponding thermocouple probe on the hot end of the corresponding at least one sample, and the counter force bearing seat is used for providing supporting acting force opposite to the compressing acting force direction of the thermocouple probe for the cold end probe compressing structure and the hot end probe compressing structure.
The beneficial effects are that: according to the hot migration test equipment for the welding spots, provided by the utility model, the cold-end heat source and the hot-end heat source are respectively provided with the respective sample supporting areas, so that the cold-end and the hot-end of a sample can realize heat transfer only by being supported on the cold-end heat source and the hot-end heat source, and the installation is convenient; the thermocouple probe for detecting the temperature of the corresponding end of the sample is pressed on the sample through the probe pressing structure of the corresponding end and is fixed through the counter-force bearing seat, so that reliable temperature detection can be realized; and the size of the sample supporting area can be designed according to the actual situation, and a plurality of samples can be placed, so that the thermomigration test can be carried out on the plurality of samples at the same time, and compared with the prior art that the samples are fixed in a clamping mode, the thermomigration test efficiency of the samples is improved.
As a further improvement, the counter-force bearing seat is a strip-shaped bearing beam.
The beneficial effects are that: the counter-force bearing seat of the strip bearing beam is small in size, heat transfer between the cold-end heat source and the hot-end heat source is reduced, mutual influence between the cold-end heat source and the hot-end heat source is avoided, interference is reduced, and test precision is improved.
As a further improvement, the cold end probe pressing structure is a pressing screw, and the tail end of the pressing screw is used for pressing the thermocouple probe.
The beneficial effects are that: the acting force applied by the compression screw to the corresponding thermocouple probe can be realized through screwing, and the device has the advantages of simple structure, reliable compression and convenient operation.
As a further development, the thermocouple probe has a flat crimping end for being pressed between the compression screw and the test piece.
The beneficial effects are that: the flat crimping end of the thermocouple probe is a plane, so that the contact area between the thermocouple probe and a sample and between the thermocouple probe and a compression screw can be increased, and the stability of crimping is improved.
As a further improvement, the equipment main body is provided with an insulating base for supporting and placing the cold-end heat source and the hot-end heat source, and is also provided with a press-fit seat corresponding to the insulating base, wherein the press-fit seat is provided with a fixing part connected with the equipment main body and a bearing part positioned above the insulating base, and the bearing part is provided with press-fit screws for press-fitting the corresponding end power sources on the insulating base.
The beneficial effects are that: the insulating base can isolate the cold end heat source and the hot end heat source from the equipment main body, so that heat loss is avoided; the arrangement of the press-fitting seat and the press-fitting screw is convenient for the disassembly and assembly of the heat source, and the structure is simple.
As a further improvement, both ends of the reaction force bearing seat are respectively fixed on the two press-fitting seats.
The beneficial effects are that: the counter force bearing seat is fixed on the press mounting seat, so that the counter force bearing seat is convenient to fix, the number of parts is reduced, and the structure is compact.
The technical scheme of the sample bearing structure of the welding spot thermal migration test equipment provided by the utility model is as follows: a sample bearing structure of a welding spot thermal migration test device comprises a cold end heat source and a hot end heat source, and a thermocouple device for detecting the temperature of two sides of a welding spot of a sample; the cold end heat source and the hot end heat source are arranged at intervals along the horizontal direction and are respectively provided with a sample supporting area for supporting different sides of the sample to finish loading of at least one sample, the welding spot thermal migration test equipment further comprises a counter force bearing seat which is fixedly arranged relative to the cold end heat source and the hot end heat source, the counter force bearing seat is provided with a cold end probe compressing structure and a hot end probe compressing structure, the cold end probe compressing structure is used for compressing a corresponding thermocouple probe on the cold end of the corresponding at least one sample, the hot end probe compressing structure is used for compressing the corresponding thermocouple probe on the hot end of the corresponding at least one sample, and the counter force bearing seat is used for providing supporting acting force opposite to the compressing acting force direction of the thermocouple probe for the cold end probe compressing structure and the hot end probe compressing structure.
The beneficial effects are that: according to the sample bearing structure of the welding spot thermomigration test equipment, the cold-end heat source and the hot-end heat source are respectively provided with the respective sample supporting areas, and the cold end and the hot end of a sample can realize heat transfer only by being supported on the cold-end heat source and the hot-end heat source, so that the installation is convenient; the thermocouple probe for detecting the temperature of the corresponding end of the sample is pressed on the sample through the probe pressing structure of the corresponding end and is fixed through the counter-force bearing seat, so that reliable temperature detection can be realized; and the size of the sample supporting area can be designed according to the actual situation, and a plurality of samples can be placed, so that the thermomigration test can be carried out on the plurality of samples at the same time, and compared with the prior art that the samples are fixed in a clamping mode, the thermomigration test efficiency of the samples is improved.
As a further improvement, the cold end probe pressing structure is a pressing screw, and the tail end of the pressing screw is used for pressing the thermocouple probe.
The beneficial effects are that: the acting force applied by the compression screw to the corresponding thermocouple probe can be realized through screwing, and the device has the advantages of simple structure, reliable compression and convenient operation.
As a further improvement, the equipment main body is provided with an insulating base for supporting and placing the cold-end heat source and the hot-end heat source, and is also provided with a press-fit seat corresponding to the insulating base, wherein the press-fit seat is provided with a fixing part connected with the equipment main body and a bearing part positioned above the insulating base, and the bearing part is provided with press-fit screws for press-fitting the corresponding end power sources on the insulating base.
The beneficial effects are that: the insulating base can isolate the cold end heat source and the hot end heat source from the equipment main body, so that heat loss is avoided; the arrangement of the press-fitting seat and the press-fitting screw is convenient for the disassembly and assembly of the heat source, and the structure is simple.
As a further improvement, both ends of the reaction force bearing seat are respectively fixed on the two press-fitting seats.
The beneficial effects are that: the counter force bearing seat is fixed on the press mounting seat, so that the counter force bearing seat is convenient to fix, the number of parts is reduced, and the structure is compact.
Drawings
FIG. 1 is a schematic diagram of a solder joint thermal migration test apparatus according to the present utility model;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a schematic view showing the state of a sample when a solder joint thermal transfer test is performed;
FIG. 5 is a top view of FIG. 4;
fig. 6 is a schematic structural diagram of a sample.
Reference numerals illustrate: 1. an apparatus main body; 2. a switch; 3. a cold end power supply; 4. the cold end is pressed and installed with a seat; 5. pressing and installing a screw; 6. a cold end insulating base; 7. a compression screw; 8. a cold end temperature controller; 9. displaying the actual temperature of the cold end; 10. displaying the cold end correction temperature; 11. a cold end dynamic temperature setting button; 12. a hot end insulating base; 13. a reaction force bearing seat; 14. the hot end is pressed and installed on the seat; 15. a hot side power supply; 16. a hot end temperature controller; 17. displaying the actual temperature of the hot end; 18. displaying the corrected temperature of the hot end; 19. a hot end dynamic temperature setting button; 20. a wire connecting seat; 21. a cold end heating plate; 22. a hot side heating plate; 23. a sample; 24. a base material; 25. and welding spots.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It should be noted that in the present embodiment, relational terms such as "first" and "second" and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the phrase "comprising one … …" or the like, as may occur, does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the depicted element.
In the description of the present utility model, unless explicitly stated and limited otherwise, terms such as "mounted," "connected," and "connected" may be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
In the description of the present utility model, unless explicitly stated and limited otherwise, the term "provided" as may occur, for example, as an object of "provided" may be a part of a body, may be separately arranged from the body, and may be connected to the body, and may be detachably connected or may be non-detachably connected. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
The present utility model is described in further detail below with reference to examples.
Example 1 of the solder joint thermal migration test apparatus provided in the present utility model:
as shown in fig. 1 to 3, the solder joint thermomigration test apparatus includes an apparatus main body 1, a thermocouple device, a sample carrying structure, and a control system. The sample bearing structure is used for bearing a sample 23, the thermocouple device comprises a cold end thermocouple probe and a hot end thermocouple probe, the cold end thermocouple probe and the hot end thermocouple probe are respectively used for being connected with the cold end and the hot end of the sample 23 so as to detect the actual temperature of the cold end and the hot end of the sample 23, and the control system comprises a cold end temperature controller 8 and a hot end temperature controller 16 which are respectively used for controlling the sample bearing structure to adjust the temperature of the cold end and the hot end of the sample 23.
The sample bearing structure comprises a cold end heat source, a hot end heat source and a probe compressing structure.
The equipment main body 1 is provided with a cold end insulating base 6, the cold end insulating base 6 is in a block shape, is specifically made of asbestos, and is placed on the equipment main body 1. A cold end heat source is arranged above the cold end insulating base 6.
The cold-end heat source comprises a cold-end heating plate 21, wherein the cold-end heating plate 21 is of a plate-shaped structure, and the upper surface of the right end of the cold-end heating plate forms a cold-end sample supporting area for supporting the cold end of a sample 23. The upper surface of the cold end insulating base 6 is provided with a cold end installation groove which extends along the left-right direction, and a cold end heating plate 21 is embedded in the cold end installation groove. The right-hand member of cold junction hot plate 21 does not stretch out the cold junction mounting groove, avoids overhanging, and the left end of cold junction hot plate 21 is connected with cold junction power 3 through the wire, and cold junction power 3 links to each other with cold junction temperature controller 6, can be according to the actual temperature of sample 23 cold junction output power to realize the temperature control of sample 23 cold junction.
The top of cold junction hot plate 21 is equipped with cold junction pressure equipment seat 4, and cold junction pressure equipment seat 4 is "nearly" font, and the bottom of both sides all is equipped with the hem around cold junction pressure equipment seat 4, is equipped with the bolt perforation on the hem, fixes cold junction pressure equipment seat 4 on equipment main part 1 through the bolt. The top of cold-end pressure equipment seat 4 is equipped with two screw holes, and two screw holes front and back interval arrangement for supply pressure equipment screw 5 to pass, pressure equipment screw 5 are used for sticis cold-end heating plate 21 on cold-end insulating heat insulation base 6. The front and rear sides of the cold end press-fitting seat 4 are provided with holes, so that heat transfer on the cold end press-fitting seat 4 can be reduced.
One end of the cold end thermocouple probe is a compression joint end with a flat structure and is used for being placed at the cold end of the sample 23. The crimping end is connected with wire connecting seat 20 through the wire, and wire connecting seat 20 is used for receiving the temperature information of cold junction probe and transmitting this information to cold junction temperature controller 8.
The right side of the cold end insulating base 6 on the equipment main body 1 is provided with a hot end insulating base 12 at intervals, and the hot end insulating base 12 is also of a block structure made of asbestos and is placed on the equipment main body 1. A hot-end heat source is arranged above the hot-end insulating base 12.
The hot-side heat source comprises a hot-side heating plate 22, the hot-side heating plate 22 is of a plate-shaped structure, and a hot-side sample supporting area is formed on the upper surface of the left end of the hot-side heating plate 22 and is used for supporting the hot side of a sample 23. The upper surface of the hot-end insulating base 12 is provided with a hot-end mounting groove which extends in the left-right direction, and a hot-end heating plate 22 is embedded in the hot-end mounting groove. The left end of the hot end heating plate 22 does not extend out of the hot end mounting groove to avoid overhanging, the right end of the hot end heating plate 22 is connected with the hot end power supply 15 through a wire, the hot end power supply 15 is connected with the hot end controller 16, and power can be output according to the actual temperature of the hot end of the sample 23 so as to realize temperature control of the hot end of the sample 23.
The hot end press-fitting seat 14 is arranged above the hot end heating plate 22, the hot end press-fitting seat 14 is shaped like a Chinese character 'ji', folding edges are arranged at the bottoms of the front side and the rear side of the hot end press-fitting seat 14, bolt through holes are formed in the folding edges, and the hot end press-fitting seat 14 is fixed on the equipment main body 1 through bolts. The top of the hot end press-fitting seat 14 is provided with two screw holes, the two screw holes are arranged at intervals front and back and used for the press-fitting screws 5 to pass through, and the press-fitting screws 5 are used for tightly pressing the hot end heating plate 22 on the hot end insulating base 12. The front and rear sides of the hot end press-fitting seat 14 are provided with openings, so that heat transfer on the cold end press-fitting seat 14 can be reduced.
One end of the hot end thermocouple probe is a compression joint end with a flat structure and is used for being placed at the hot end of the sample 23. The crimp end is also connected to the wire connection block 20 by a wire, and the wire connection block 20 receives the temperature information of the hot end probe and transmits the information to the hot end temperature controller 16.
A counter force bearing seat 13 is arranged above the cold end press-fitting seat 6 and the hot end press-fitting seat 14, the counter force bearing seat 13 is a strip-shaped bearing beam, the counter force bearing seat extends between two screw holes arranged on the two press-fitting seats along the left and right directions, mounting holes are respectively formed in the left and right ends of the counter force bearing seat 13, and the two ends of the counter force bearing seat 13 are respectively fixed on the cold end press-fitting seat 4 and the hot end press-fitting seat 14 through penetrating bolts. The two mounting holes are elongated holes, and the elongated holes extend in the left-right direction so as to fix the reaction force bearing seat 13 at different positions in the left-right direction according to actual conditions. The middle part of the counter force bearing seat 13 is provided with two groups of perforations, the two groups of perforations are arranged at intervals left and right, each group of perforations is provided with two perforations, the wall of each perforation is provided with internal threads, the compression screw 7 is selectively arranged in the appropriate perforation according to the specific length of the sample 23, the bottom of the compression screw 7 is a jacking end, and the corresponding thermocouple is used for being compressed at the corresponding ends of the compression screw 7 and the sample 23. The compression screws 7 penetrating through the left screw hole and the right screw hole respectively form a cold end probe compression structure and a hot end probe compression structure.
Both the cold side temperature controller 8 and the hot side temperature controller 16 are prior art. The cold end temperature controller 8 is provided with a cold end actual temperature display 9, a cold end correction temperature display 10 and a cold end dynamic temperature setting button 11, wherein the cold end actual temperature display 9 is used for displaying the real-time temperature of the cold end of the sample 23 measured by the cold end thermocouple probe, the cold end correction temperature display 10 is used for displaying the set temperature of the cold end of the sample 23, and the cold end dynamic temperature setting button 11 is used for controlling the rising and falling of the temperature of the cold end of the sample 23. The hot side temperature controller 16 is connected with a hot side power supply 15 and a wire connecting seat 20. The hot end temperature controller 16 is provided with a hot end actual temperature display 17, a hot end correction temperature display 18 and a hot end dynamic temperature setting button 19, wherein the hot end actual temperature display 17 is used for displaying the real-time temperature of the hot end of the sample 23 measured by the hot end thermocouple probe, the hot end correction temperature display 18 is used for displaying the set temperature of the hot end of the sample 23, and the hot end dynamic temperature setting button 19 is used for controlling the rising and falling of the hot end temperature of the sample 23.
The device main body 1 is also provided with a switch 2 for controlling the start and stop of the device.
As shown in fig. 6, the sample 23 in the present embodiment is formed by welding two base materials 24. In the test, as shown in fig. 4 and 5, the cold end heating plate 21 and the hot end heating plate 22 are respectively embedded into the cold end insulating base 6 and the hot end insulating base 12, then the cold end press-fitting base 4 and the hot end press-fitting base 14 are respectively fixed on the main body 1 of the device, and the two heating plates are pressed on the corresponding insulating bases through the press-fitting screws 5. Then, two ends of a sample 23 with welding spots 25 are respectively placed on the cold end heating plate 21 and the hot end heating plate 22, the counter force bearing seat 13 is installed on the two press-fit seats, and the cold end thermocouple probe and the hot end thermocouple probe are respectively pressed on the cold end and the hot end of the sample 23 by penetrating the press-fit screws 5 on the counter force bearing seat 13. And then, a switch 2 on the equipment main body 1 is turned on, the cold end temperature and the hot end temperature are adjusted to set values, then, the sample 23 is taken down after the required test time is kept still, and the condition of IMC in the welding spot 25 of the sample 23 is observed to judge the thermomigration result of the welding spot 25.
According to the hot migration test equipment for the welding spots, provided by the utility model, the cold-end heat source and the hot-end heat source are respectively provided with the respective sample supporting areas, so that the cold end and the hot end of the sample 23 can realize heat transfer only by being supported on the cold-end heat source and the hot-end heat source, and the installation is convenient; the thermocouple probe for detecting the temperature of the corresponding end of the sample is pressed on the sample 23 through the probe pressing structure of the corresponding end and is fixed through the counter-force bearing seat 13, so that reliable temperature detection can be realized; and the size of the sample supporting area can be designed according to the actual situation, and a plurality of samples can be placed, so that the thermomigration test can be carried out on the plurality of samples at the same time, and compared with the prior art that the samples are fixed in a clamping mode, the thermomigration test efficiency of the samples is improved.
Example 2 of the solder joint thermal migration test apparatus provided in the present utility model:
this embodiment differs from embodiment 1 in that: in example 1, only one sample 23 was provided corresponding to the cold side heat source and the hot side heat source, and the solder joint thermal migration test was performed on only one sample 23. In this embodiment, the widths of the insulating bases and the heating plates at the two ends are widened, a plurality of samples 23 are placed on the heating plates at the same time, and the cold end thermocouple probe and the hot end thermocouple probe are pressed on the cold end and the hot end of one of the samples 23 through the counter force bearing base 13 and the compression screw 7, so that the solder joint thermomigration test is performed on the plurality of samples 23 at the same time.
Example 3 of the solder joint thermal migration test apparatus provided in the present utility model:
this embodiment differs from embodiment 1 in that: in embodiment 1, the reaction force bearing seat 13 is strip-shaped, and two ends are respectively supported on the cold end compressing seat 4 and the hot end compressing seat 14. In this embodiment, the reaction force bearing seat 13 is divided into two blocks, namely a cold end reaction force bearing seat and a hot end reaction force bearing seat, which are respectively connected to the cold end compressing seat 4 and the hot end compressing seat 14 by screws, the right end of the cold end reaction force bearing seat is overhanging, and the left end of the hot end reaction force bearing seat is overhanging for installing the compressing screws 5.
Example 4 of the solder joint thermal migration test apparatus provided in the present utility model:
this embodiment differs from embodiment 1 in that: in embodiment 1, the cold end probe pressing frame and the hot end probe pressing structure are both pressing screws 7, and the bottom section of each pressing screw 7 is a pressing end. In this embodiment, the cold end probe pressing frame and the hot end probe pressing structure are quick clamps in the form of four connecting rods in the prior art. In other embodiments, the cold end probe pressing frame and the hot end probe pressing structure may also be guide posts disposed on the cold end press-fitting seat 4 and the hot end press-fitting seat 14, respectively, where the guide posts are connected to the press-fitting seat through springs, and press the probes through spring pressing forces.
Example 5 of the solder joint thermal migration test apparatus provided in the present utility model:
this embodiment differs from embodiment 1 in that: in embodiment 1, cold-end heating plate 21 and hot-end heating plate 22 are pressed against cold-end insulating base 6 and hot-end insulating base 12, respectively, by press-fit screws 5. In other embodiments, the cold-end press-fitting seat 4 and the hot-end press-fitting seat 14 are omitted, and through holes are formed in the cold-end heating plate 21 and the hot-end heating plate 22, and the cold-end heating plate 21 and the hot-end heating plate 22 are respectively pressed against the cold-end insulating base 6 and the hot-end insulating base 12 by penetrating screws.
Example 6 of the solder joint thermal migration test apparatus provided in the present utility model:
this embodiment differs from embodiment 1 in that: in embodiment 1, the cold end insulating base 6 and the hot end insulating base 12 are arranged at a left-right interval. Whereas in this embodiment the cold end insulating base 6 and the hot end insulating base 12 are integrally designed.
The utility model also provides an embodiment of a sample carrying structure for a solder joint thermomigration test apparatus:
the structure of the sample carrying structure of the solder joint thermal migration test apparatus in this embodiment is the same as that of the sample carrying structure of the above-described solder joint thermal migration test apparatus embodiment 1, and will not be described in detail here. In other embodiments, a semiconductor refrigeration sheet may be used as the cold side heat source.
Of course, in other embodiments, the sample carrying structure of the solder joint thermal migration testing apparatus may also be the structure of the sample carrying structure in any one of embodiments 2 to 6 of the solder joint thermal migration testing apparatus, which is not described herein again.
The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The device comprises a device main body (1), wherein a cold-end heat source and a hot-end heat source for enabling two sides of a welding spot of a sample (23) to reach corresponding temperatures are arranged on the device main body (1), and a thermocouple device for detecting the temperatures of the two sides of the welding spot of the sample (23) is arranged on the device main body; the device is characterized in that the cold-end heat source and the hot-end heat source are arranged at intervals along the horizontal direction and are respectively provided with a sample supporting area for supporting different sides of a sample (23) to finish loading of at least one sample (23), the welding spot thermomigration test device further comprises a counter force bearing seat (13) fixedly arranged relative to the cold-end heat source and the hot-end heat source, the counter force bearing seat (13) is provided with a cold-end probe compressing structure and a hot-end probe compressing structure, the cold-end probe compressing structure is used for compressing a corresponding thermocouple probe on the cold end of the corresponding at least one sample (23), the hot-end probe compressing structure is used for compressing the corresponding thermocouple probe on the hot end of the corresponding at least one sample (23), and the counter force bearing seat (13) is used for providing supporting force opposite to the compressing force direction of the thermocouple probe for the cold-end probe compressing structure and the hot-end probe compressing structure.
2. The solder joint thermomigration testing apparatus according to claim 1, wherein the reaction force bearing seat (13) is a strip-shaped bearing beam.
3. The welding spot thermomigration testing apparatus according to claim 1, wherein the cold end probe pressing structure is a pressing screw (7), and the tail end of the pressing screw (7) is used for pressing the thermocouple probe.
4. A solder joint thermomigration testing device according to claim 3, characterized in that the thermocouple probe has a flat crimping end for being pressed between a compression screw (7) and a test specimen (23).
5. The solder joint thermomigration testing apparatus according to any one of claims 1 to 4, wherein an insulating base for supporting and placing the cold-side heat source and the hot-side heat source is provided on the apparatus main body (1), and a press-fitting seat corresponding to the insulating base is provided, the press-fitting seat has a fixing portion connected with the apparatus main body (1) and a bearing portion located above the insulating base, and press-fitting screws (5) are provided on the bearing portion for press-fitting the corresponding side heat source on the insulating base.
6. The solder joint thermomigration testing apparatus as claimed in claim 5, wherein the opposite ends of the reaction force bearing seat (13) are respectively fixed to the two press-fit seats.
7. A sample bearing structure of a welding spot thermal migration test device comprises a cold end heat source and a hot end heat source, and a thermocouple device for detecting the temperature of two sides of a welding spot of a sample (23); the device is characterized in that the cold-end heat source and the hot-end heat source are arranged at intervals along the horizontal direction and are respectively provided with a sample supporting area for supporting different sides of a sample (23) to finish loading of at least one sample (23), the welding spot thermomigration test device further comprises a counter force bearing seat (13) fixedly arranged relative to the cold-end heat source and the hot-end heat source, the counter force bearing seat (13) is provided with a cold-end probe compressing structure and a hot-end probe compressing structure, the cold-end probe compressing structure is used for compressing a corresponding thermocouple probe on the cold end of the corresponding at least one sample (23), the hot-end probe compressing structure is used for compressing the corresponding thermocouple probe on the hot end of the corresponding at least one sample (23), and the counter force bearing seat (13) is used for providing supporting force opposite to the compressing force direction of the thermocouple probe for the cold-end probe compressing structure and the hot-end probe compressing structure.
8. The sample carrying structure of the solder joint thermomigration testing apparatus according to claim 7, wherein the cold end probe pressing structure is a pressing screw (7), and a tail end of the pressing screw (7) is used for pressing the thermocouple probe.
9. The sample carrying structure of the solder joint thermal migration testing apparatus according to claim 7 or 8, wherein the apparatus main body (1) is provided with an insulating and heat-insulating base for supporting and placing a cold-end heat source and a hot-end heat source, and is further provided with a press-fitting seat corresponding to the insulating and heat-insulating base, the press-fitting seat is provided with a fixing part connected with the apparatus main body (1) and a carrying part positioned above the insulating and heat-insulating base, and the carrying part is provided with press-fitting screws (5) for press-fitting the corresponding end power source on the insulating and heat-insulating base.
10. The sample carrying structure of the solder joint thermal migration testing apparatus according to claim 9, wherein both ends of the reaction force carrying seat (13) are respectively fixed to both press-fit seats.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220480426.1U CN218956726U (en) | 2022-03-07 | 2022-03-07 | Welding spot thermomigration test equipment and sample bearing structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220480426.1U CN218956726U (en) | 2022-03-07 | 2022-03-07 | Welding spot thermomigration test equipment and sample bearing structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN218956726U true CN218956726U (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220480426.1U Active CN218956726U (en) | 2022-03-07 | 2022-03-07 | Welding spot thermomigration test equipment and sample bearing structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218956726U (en) |
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2022
- 2022-03-07 CN CN202220480426.1U patent/CN218956726U/en active Active
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