Memory particle testing device

Abstract

The utility model provides a memory particle testing device. The testing device comprises a box body, and a pressing assembly, a driving mechanism and a placing seat which are arranged in the box body, during operation, after the particle memory is placed in the placement groove of the placement seat, the placement seat is driven to slide towards the interior of the test end, in the process, the placement seat inclines downwards into the lower shell along the inclined section at one end of the sliding groove, then linearly slides towards the test end along the linear section in the middle of the sliding groove, and when the placement seat reaches the interior of the test end, the placement seat moves upwards to the pressing block along the other inclined section of the sliding groove; the internal memory particles loaded in the placing groove can be pressed upwards to the pressing block, the pressing block is vertically pressed to the internal memory particles in the placing groove through the elastic acting force between the pressing block and the box body, the pressure of the internal memory particles pressed to the bottom face of the placing groove is evenly distributed, and it is guaranteed that all detection points of the internal memory particles make close contact with all probes. The stable contact between the probe and the flash memory particles is realized, so that the test stability is ensured, and misjudgment caused by the reduction of the integrity of a test signal is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the memory grain test technical field especially points to a memory grain testing device. BACKGROUND

[0002] In the test process of memory grain (such as DRAM, NAND Flash etc.), the fixture needs to be frequently opened and closed to realize the rapid loading and replacement of chip. The flip type fixture is regarded as the improvement scheme of traditional pressing type or sliding type fixture because of having intuitive operation logic and relatively stable clamping space.

[0003] However, along with the improvement of test automation demand and chip packaging precision, the existing flip type fixture usually applies closing pressure through single rotating shaft, leading to the concentration of pressure in the area near rotating shaft, and the contact force of chip end far from rotating shaft significantly attenuates. This uneven pressure distribution can cause the local contact resistance to rise, the test signal integrity to decline, and even the false failure misjudgment to occur. SUMMARY

[0004] In view of the deficiencies in the above background art, the utility model provides a memory grain testing device.

[0005] The utility model adopts the following technical scheme:

[0006] A memory grain testing device, characterized in that the device comprises:

[0007] The box body forms a placing end and a test end at both ends respectively, the upper surface of the placing end forms a placing opening, the inside of the box body is symmetrically provided with a sliding groove at both sides, and the two ends of the sliding groove are inclined upward to form two inclined sections towards the placing end and the test end;

[0008] The compression assembly comprises a compression block and an elastic member connected between the compression block and the shell, and the elastic member provides a downward pressure perpendicular to the test end;

[0009] The driving mechanism comprises a sliding seat, and the sliding seat is limited to linearly slide in the box body relative to the placing end and the test end;

[0010] The placing seat is provided with a placing groove for placing a memory card, and the placing seat is limited to vertically lift relative to the sliding seat, and the two sides of the bottom of the placing seat are rollingly matched with the sliding groove through a roller;

[0011] When the roller slides to the top of the inclined section of the chute at one end of the placement slot, the placement seat is lifted to the placement opening, and the placement slot at the top of the placement seat is exposed to the outside to load or unload the memory particles; when the roller slides to the top of the inclined section of the chute at one end of the test end, the pressing block is correspondingly positioned at the center of the placement slot, and the placement seat is lifted to the memory particles in the placement slot to form stable pressing with the pressing block.

[0012] In a possible implementation, the driving mechanism further comprises a driving motor, a screw rod and a nut support arranged in the box body, the screw rod is arranged to rotate in the box body, the driving motor drives the screw rod to rotate, the nut support is fixed to the sliding seat, and the nut support and the screw rod are adapted to be connected in screw.

[0013] In a possible implementation, a sliding rail is fixed in the box body, two ends of the sliding rail are respectively fixed to the test end and the placement end, the sliding rail is adapted to be connected with a sliding block that slides relative to each other, and the sliding block is fixed to the sliding seat.

[0014] In a possible implementation, the pressing assembly further comprises a connecting plate fixed to the box body and having a gap with the box body, the connecting plate is provided with a plurality of first guide holes penetrating therethrough, the pressing block is provided with a plurality of first guide columns, each first guide column is adapted to penetrate through each first guide hole, and the first guide column is further provided with a limiting portion between the connecting plate and the box body, and the limiting portion has an outer diameter greater than the first guide hole.

[0015] In a possible implementation, a second guide column is fixed to each corner of the bottom of the placement seat, a second guide hole is fixed to each corner of the bottom of the sliding seat, and each second guide column is adapted to penetrate through each second guide hole to limit the placement seat to vertically lift relative to the sliding seat.

[0016] As can be seen from the above description of the structure of the utility model, compared with the prior art, the utility model has the following advantages: after the memory particles are placed in the placement slot of the placement seat, the placement seat slides into the test end, in this process, the placement seat is inclined downward along the inclined section of one end of the chute into the lower housing, then linearly slides along the straight section in the middle of the chute to the test end, and when the placement seat is in the test end, the placement seat is inclined upward along the other inclined section of the chute to the pressing block, so that the memory particles loaded in the placement slot are pressed upward to the pressing block, the elastic force between the pressing block and the box body is used to vertically press the memory particles in the placement slot to the pressing block, the pressure of the memory particles pressed to the bottom surface of the placement slot is uniformly distributed, the detection points of the memory particles and the probes are tightly contacted, the stable contact between the probes and the flash memory particles is realized, the stability of the test is ensured, and the misjudgment caused by the decline of the test signal integrity is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0018] Figure 2 It is a schematic view of the lower shell and its internal structure.

[0019] Figure 3 It is a lateral section view schematic view of the utility model after the placement seat moves to the placement end.

[0020] Figure 4 It is a lateral section view schematic view of the utility model after the placement seat moves to the test end.

[0021] Figure 5 It is Figure 4 It is an enlarged schematic view of A in the middle.

[0022] Figure 6 It is a three-dimensional structure schematic view of the upper shell from a bottom perspective.

[0023] Figure 7 It is a section structure schematic view of the upper shell and its internal structure.

[0024] Figure 8 It is a three-dimensional structure schematic view of the sliding seat from a bottom perspective.

[0025] Figure 9 It is a three-dimensional structure schematic view of the placement seat from a bottom perspective. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings.

[0027] Hereinafter, the terms "first", "second", and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0028] In addition, in the present application, the orientation terms such as "up", "down", and the like are defined with respect to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and they can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0029] The utility model provides a kind of memory grain 5 testing device, as shown in the drawings Figures 1 to 4As shown, the device comprises a box body 1, and a pressing assembly, a driving mechanism and a placing seat 4 arranged in the box body 1. The box body 1 is provided with a placing groove 401 for placing a memory card on the placing seat 4. Further referring to the accompanying drawings, Figure 5 The placing groove 401 is provided with probes 62, and each probe 62 corresponds to a test point of the memory grain 5 when the memory grain 5 is placed in the placing groove 401. The placing seat 4 is provided with a placing end 102 and a test end 101. The upper surface of the placing end 102 is provided with a placing opening 121. The box body 1 is provided with two symmetrical sliding grooves 131 on the two sides of the inside of the box body 1. The two ends of the sliding grooves 131 are inclined upward to form inclined sections 1312 towards the placing end 102 and the test end 101, and a straight section 1311 is formed between the two inclined sections 1312. The driving mechanism, the pressing assembly and the placing seat 4 are arranged between the two sliding grooves 131. The driving mechanism drives the placing seat 4 to move relative to the placing end 102 and the test end 101, and when the placing seat 4 moves to the test end 101, the memory grain 5 in the placing seat 4 is stably pressed by the pressing assembly.

[0030] Preferably, the box body 1 comprises a lower shell 12 and an upper shell 11. The upper shell 11 is fixed on one end of the lower shell 12 to seal one end of the lower shell 12 to form the test end 101. The other end of the lower shell 12 is the test end 101, and the unsealed end of the lower shell 12 is the placing end 102. The sealed part of the lower shell 12 forms the placing opening 121. The pressing assembly is connected to the upper shell 11, and the placing seat 4 and the driving mechanism are arranged in the lower shell 12. The sliding grooves 131 can be arranged on a side plate 13. The lower shell 12 is fixed with the side plate 13 by screwing on both sides of the lower shell 12, so that the two sides of the side plate 13 form the sliding grooves 131.

[0031] As shown in FIG. 2, Figure 6 and 7As shown, the pressing assembly includes a pressing block 21 and an elastic member 22 connected between the pressing block 21 and the housing, and the elastic member 22 provides a downward pressing force perpendicular to the testing end 101. Preferably, the elastic member 22 can be a spring. Further, the pressing assembly also includes a connecting plate 23 fixed to the upper housing 11 of the box body 1, and the connecting plate 23 and the upper housing 11 have a gap. The connecting plate 23 is provided with a plurality of first guide holes, and the pressing block 21 is provided with a plurality of first guide columns 24, each of which is adapted to pass through each first guide hole, and the first guide column 24 is further provided with a limiting portion 241 between the connecting plate 23 and the box body 1, and the outer diameter of the limiting portion 241 is greater than the first guide hole. Through the structure of the first guide column 24, the pressing block 21 can only be located in the testing end 101 to lift relative to the connecting plate 23, and each first guide column 24 is externally sleeved with an elastic member 22, and the two ends of the elastic member 22 are respectively abutted against the connecting plate 23 and the pressing block 21, so that the elastic force of the elastic member 22 forms a pushing force to push the pressing block 21 away from the connecting plate 23, that is, a downward pressing force to press the pressing block 21 towards the lower housing 12.

[0032] The connecting mode of the connecting plate 23 and the upper housing 11 can be as shown in the attached Figure 7 As shown, each corner of the upper housing 11 is provided with a protruding stud 111, and each stud 111 is adapted to be screwed. After the connecting plate 23 is pressed against the stud 111, the screw is screwed into the stud 111 through the connecting plate 23, so that the connecting plate 23 is fixed to the upper housing 11, and the height of the stud 111 forms the gap between the connecting plate 23 and the upper housing 11.

[0033] As shown in the attached Figure 2 and 8 The driving mechanism includes a sliding seat 31, a lead screw 32 and a nut support 34. Among them, the sliding seat 31 linearly slides relative to the placing end 102 and the testing end 101, and its limiting mode can be that a sliding rail 35 is fixed in the box body 1, the two ends of the sliding rail 35 are respectively fixed to the testing end 101 and the placing end 102, the sliding rail 35 is adapted to connect a sliding block 36, and the sliding block 36 is fixed to the bottom of the sliding seat 31, so as to limit the movement of the sliding seat 31 relative to the testing end 101 and the placing end 102 in the lower housing 12. In addition, the bottom of the sliding seat 31 is fixed with a second guide hole 311, and the bottom of the placing seat 4 is fixed with a second guide column 42, each of which is adapted to pass through each second guide hole 311, so as to limit the vertical lifting of the placing seat 4 relative to the sliding seat 31.

[0034] Referring again to the attached Figure 8, the screw rod 32 is arranged to rotate in the lower shell 12 of the box body 1, specifically two bearing seats can be fixed in the lower shell 12, and the two ends of the screw rod 32 are fixed to the two bearing seats respectively to limit that the screw rod 32 can only rotate. The driving motor 33 is also fixed in the lower shell 12, and the driving motor 33 drives the screw rod 32 to rotate. The nut support 34 is fixed on the sliding seat 31, and the nut support 34 and the screw rod 32 are adapted to screw connection, so that the driving motor 33 can drive the sliding seat 31 to move by driving the screw rod 32 to rotate, thereby driving the placing seat 4 to move relative to the test end 101 and the placing end 102. Preferably, the utility model can also be provided with a control system, which is used for controlling the opening and closing of the driving motor 33, and specifically a button can be arranged outside the box body, and a signal for controlling the opening and closing of the driving motor 33 is sent to the control system by triggering the button. At the same time, travel switches are arranged in the lower shell 12 at the end positions corresponding to the two inclined sections 1312, so that the sliding seat 31 triggers the two travel switches respectively when moving to the top of the two inclined sections 1212, and the travel switches send signals to the control system after being triggered, and the control system controls the driving motor 33 to pause according to the signals, so that the sliding seat 31 pauses.

[0035] As shown in the accompanying drawings, Figure 9 As shown in the accompanying drawings,

[0036] In addition, the test device of the utility model is also provided with a PCB board 61 and a main control chip, wherein the PCB board 61 is embedded in the placing seat 4, the probes 62 are distributed on the PCB board 61, and the probes 62 are electrically connected with the main control chip, so that the memory particles 5 installed in the placing groove 401 can be detected through the main control chip, and the specific detection method is prior art, which will not be described in detail here.

[0037] In summary, the utility model test memory particles 5, the particle memory is placed in the placement groove 401 of the placement seat 4, then drive the placement seat 4 to slide to the test end 101, in this process, the placement seat 4 is inclined to the lower casing 12 along the inclined section 1312 of the one end of the sliding groove 131, then is linearly slid to the test end 101 along the straight section 1311 in the middle of the sliding groove 131, when in the test end 101, the placement seat 4 is up to the pressing block 21 along the other inclined section 1312 of the sliding groove 131, namely the memory particles 5 loaded in the placement groove 401 is pressed to the pressing block 21, the elastic force between the pressing block 21 and the box body 1 is used to make the pressing block 21 press the memory particles 5 in the placement groove 401, the pressure distribution of the memory particles 5 is uniform to the bottom surface of the placement groove 401, guarantees each detection point of the memory particles 5 and each probe 62 to be closely contacted, realizes the stable contact of the probe 62 and the flash memory particles, to guarantee the stability of test, thereby avoiding the misjudgment caused by the decline of test signal integrity.

[0038] The above is only the specific implementation of the utility model, but the design concept of the utility model is not limited to this, and any non-essential change to the utility model using this concept should belong to the act of infringing the protection scope of the utility model.

Claims

1. A memory cell testing apparatus, comprising: The device comprises: a box body, two ends of which form a placing end and a testing end respectively, an upper surface of the placing end forms a placing opening, and two sides of the inside of the box body are symmetrically provided with sliding grooves, two ends of the sliding grooves are inclined upward to form two inclined sections towards the placing end and the testing end; a pressing assembly, comprising a pressing block and an elastic member connected between the pressing block and the box body, the elastic member providing a downward pressure force perpendicular to the testing end; a driving mechanism, comprising a sliding seat, the sliding seat being limited to linearly slide within the box body relative to the placing end and the testing end; a placing seat, the placing seat being provided with a placing groove for placing a memory card, the placing seat being limited to vertically lift relative to the sliding seat, and two sides of the bottom of the placing seat being rollingly matched with the sliding grooves through rollers; wherein, when the rollers slide to the top of the inclined section of the sliding groove at one end of the placing groove, the placing seat is lifted to the placing opening, and the placing groove at the top of the placing seat is exposed to the outside to load or unload the memory card; when the rollers slide to the top of the inclined section of the sliding groove at one end of the testing end, the pressing block is correspondingly positioned at the center of the placing groove, and the placing seat is lifted to the memory card in the placing groove to form a stable pressing connection with the pressing block.

2. The apparatus of claim 1, wherein, The driving mechanism further comprises a driving motor, a screw rod and a nut support provided in the box body, the screw rod is provided to rotate within the box body, the driving motor drives the screw rod to rotate, the nut support is fixed to the sliding seat, and the nut support and the screw rod are screw-connected.

3. The apparatus of claim 1 or 2, wherein, A sliding rail is fixed in the box body, two ends of the sliding rail are fixed to the testing end and the placing end respectively, the sliding rail is adapted to connect a sliding block for relative sliding, and the sliding block is fixed to the sliding seat.

4. The apparatus of claim 1, wherein, The pressing assembly further comprises a connecting plate, the connecting plate is fixed in the box body, and the connecting plate and the box body have a gap, the connecting plate is provided with a plurality of first guide holes, the pressing block is provided with a plurality of first guide columns, each first guide column is adapted to pass through each first guide hole, and the first guide column is further provided with a limiting portion between the connecting plate and the box body, and the limiting portion has an outer diameter greater than the first guide hole.

5. The apparatus of claim 1, wherein, Second guide columns are fixed at each corner of the bottom of the placing seat, second guide holes are fixed at each corner of the bottom of the sliding seat, each second guide column is adapted to pass through each second guide hole, and the placing seat is limited to only vertically lift relative to the sliding seat.

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