CN115662915A - Lead frame orthopedic detection assembly and device - Google Patents
Lead frame orthopedic detection assembly and device Download PDFInfo
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- CN115662915A CN115662915A CN202211564164.8A CN202211564164A CN115662915A CN 115662915 A CN115662915 A CN 115662915A CN 202211564164 A CN202211564164 A CN 202211564164A CN 115662915 A CN115662915 A CN 115662915A
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- 238000001514 detection method Methods 0.000 title claims abstract description 76
- 230000000399 orthopedic effect Effects 0.000 title claims abstract description 10
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- 239000004020 conductor Substances 0.000 claims abstract description 7
- 230000000712 assembly Effects 0.000 claims description 13
- 238000000429 assembly Methods 0.000 claims description 13
- 238000007689 inspection Methods 0.000 claims description 8
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- 238000007906 compression Methods 0.000 claims description 5
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- 238000000034 method Methods 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 4
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides an orthopedic detection subassembly of lead frame and device, belongs to semiconductor device substrate production and detects technical field, and orthopedic detection subassembly includes: the mounting frame is provided with a cross beam, and two ends of the cross beam are provided with stand columns; two ends of the supporting roller are respectively connected to the stand columns on two sides, the outer surface of the middle section of the supporting roller is a hard insulating layer, and the outer surface of at least one end of the supporting roller is provided with a conductive ring; the top of supporting roller is located to the detection roller set parallel, and it includes center pin and a plurality of arc, and the center pin is made for conducting material, and the center pin all links to each other with the detection host computer with the signal of telecommunication of conducting ring, and the center pin both ends are connected respectively in the stand of both sides, and the arc is stereoplasm insulating material, and the arc is arranged in the outer wall of center pin along the circumference, and the outer wall of all arcs founds the complete face of cylinder of formation, wherein wears to be equipped with electrically conductive probe in the arc along the same interval of circumference. The scheme can detect the pins while the lead frame is orthopedic, and has higher detection efficiency.
Description
Technical Field
The invention belongs to the technical field of production and detection of semiconductor device substrates, and particularly relates to a lead frame shape righting detection assembly and device.
Background
The semiconductor devices are usually formed on a lead frame made of metal, the lead frame is usually formed by stamping a copper sheet, and in order to improve the production efficiency and the yield of a single lead frame, a plurality of packaging areas of the semiconductor devices are arranged on most lead frames in an array manner, and each packaging area is provided with a plurality of pins. When the semiconductor device is packaged, glue is applied to the pins, cores are dotted, a jumper wire is assembled or another lead frame is overlapped, and then the final single semiconductor device is formed through processes of solid welding, plastic packaging, blanking and the like. After the lead frame is formed by punching, the lead frame needs to be reshaped and inspected before the semiconductor package. The purpose of the correction is to enable all the pins to be in the same plane and enable the lead frame to be in a flat state so as to facilitate accurate gluing and core dotting; the detection is mainly used for judging whether the pin on one lead frame is lost or not so as to determine whether the lead frame is continuously used or discarded and recycled.
The existing detection device usually adopts a visual comparison mode, namely, a picture of a qualified lead frame is firstly stored in a detection system, then the picture is taken as a reference, the detection system scans or photographs the picture through the visual system, the obtained picture is compared with the reference picture, and if the difference exists, a prompt is sent. The detection method is carried out after the lead frame is shaped, otherwise, the detection structure is influenced by the deformation of the lead frame or other parts, namely, the detection method does not allow any part of the lead frame to be lost or deformed, even the part outside a semiconductor packaging area, so that qualified leads still exist in the detected defective products, and the quality of semiconductor finished products is not influenced. In order to reduce the scrap rate of the lead frame, a manual re-inspection link needs to be set, so that the detection accuracy is low, and the production efficiency of the detection link is influenced; in addition, the method also needs to separately arrange the orthopedic device, thereby increasing the investment of equipment and cost.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the lead frame shape righting detection assembly and the lead frame shape righting detection device, which can detect the pins while the lead frame is shaped, have low equipment investment and higher detection efficiency and do not need manual re-detection.
In order to realize the purpose of the invention, the following scheme is adopted:
a lead frame orthopedic inspection assembly comprising: mounting bracket, supporting roller and detection roller set.
The mounting frame is provided with a cross beam, and two ends of the cross beam are vertically provided with mutually parallel upright posts;
two ends of the supporting roller are respectively connected to the upright posts at two sides, the outer surface of the middle section of the supporting roller is a hard insulating layer, and the outer surface of at least one end of the supporting roller is provided with a conductive ring;
the detection roller set is arranged above the supporting roller in parallel and comprises a central shaft and a plurality of arc-shaped plates, the central shaft is made of conductive materials, electric signals of the central shaft and the conductive rings are connected with the detection upper computer, two ends of the central shaft are respectively connected with the stand columns on two sides, the arc-shaped plates are made of hard insulating materials, the arc-shaped plates are arranged on the outer wall of the central shaft along the circumference, the outer walls of all the arc-shaped plates form a complete cylindrical surface, probes penetrate through the arc-shaped plates at the same interval along the circumference, and the arc length distance of the interval is the same as the distance between two adjacent transverse rows on the lead frame; the probe is made of conductive materials, the rear end of the probe is in contact with the outer wall of the central shaft, the front end of the probe protrudes out of the outer wall of the arc-shaped plate for a preset distance, and the probe can stretch along the connecting line direction of the front end and the rear end of the probe;
the supporting rollers and the detection roller group rotate synchronously and in the opposite direction.
Furthermore, the front end of the probe is a needle head, the middle section of the probe is of a spring structure, and the rear end of the probe is provided with a flat plate.
Further, the length direction of the probe is consistent with the normal direction of the detection roller group.
Furthermore, the arc has seted up the mounting hole that a plurality of places were used for installing the probe along length direction.
Further, the both ends of center pin all are equipped with the end cover, and the end cover all has the circular cone hole towards one side in the middle of the center pin, and the circular cone hole is coaxial with the center pin, and the both ends outside of arc all has the inclined plane, and after the detection roller set equipment, the inclined plane of arc and the circular cone hole inner wall laminating that corresponds the side.
Furthermore, the circular discs are arranged in the conical holes of the end covers, and the belleville springs are arranged between the circular discs and the bottom surfaces of the conical holes.
Furthermore, the distance between the supporting roller and the detection roller group is adjustable so as to adapt to lead frames with different thicknesses.
Further, the both ends of center pin all are equipped with the slider, and the slider is insulating material, and the slider slides and locates on the stand, and the top of slider rotates and is equipped with adjusting screw, and adjusting screw passes the top of stand.
The lead frame shape righting detection device comprises a conveying track and the lead frame shape righting detection assembly, wherein a plurality of groups of lead frame shape righting detection assemblies are arranged along the conveying direction of the conveying track, and the positions of the lead frame shape righting detection assemblies along the width direction of the conveying track are adjustable.
Furthermore, the inner wall of the conveying track is provided with a mounting groove for connecting the mounting frame, and the outer wall of the conveying track is provided with a compression screw corresponding to the mounting groove in a penetrating manner.
The invention has the beneficial effects that:
1. the supporting rollers and the detection roller group can correct the lead frame and the pins, so that the wrong detection judgment is avoided, the manual reinspection flow is reduced, the detection accuracy is improved, the detection mode only detects the critical pins, the influence of other unimportant parts on the detection result is avoided, and the error detection phenomenon is avoided.
2. The orthopedic and detection device can finish the orthopedic and detection at the same time, and can reduce the investment of equipment and reduce the cost.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Fig. 1 shows a partial schematic structure of a lead frame.
Fig. 2 shows a schematic diagram of a preferred structure of the lead frame reshaping test assembly of the present application.
FIG. 3 shows a schematic diagram of a preferred structure of the probe of the present application.
Fig. 4 shows an exploded view of the structure of the inspection roller set of the present application.
Fig. 5 shows a schematic structural view of the arc plate and the end cover of the present application.
Fig. 6 shows a cross-sectional view of the overall structure of the inspection roller set of the present application.
Fig. 7 shows a schematic structural diagram of a preferred embodiment of the lead frame reshaping detection device of the present application.
The labels in the figure are: the device comprises a mounting frame-1, a cross beam-11, a column-12, a supporting roller-2, a conductive ring-21, a detection roller group-3, a central shaft-31, an arc-shaped plate-32, an inclined plane-321, a probe-33, an end cover-34, a conical hole-341, a disc-342, a belleville spring-343, a sliding block-35, an adjusting screw-36, a conveying track-4 and a compression screw-41.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are a part of the embodiments of the present invention, not all of the embodiments of the present invention.
Example 1
As shown in fig. 2 to 6, the lead frame reshaping inspection assembly includes a mounting frame 1, a supporting roller 2 and an inspection roller group 3.
Specifically, as shown in fig. 2, the mounting bracket 1 has a cross beam 11, and two ends of the cross beam 11 are vertically provided with parallel upright posts 12.
Specifically, as shown in fig. 2, two ends of the supporting roller 2 are respectively connected to the pillars 12 at two sides, the outer surface of the middle section of the supporting roller 2 is a hard insulating layer, and the outer surface of at least one end of the supporting roller 2 is provided with a conductive ring 21. The hard insulating layer can be made of ceramics, toughened glass or hard plastics.
Specifically, as shown in fig. 2 to 6, the detection roller set 3 is disposed above the support roller 2 in parallel, and includes a central shaft 31 and a plurality of arc plates 32, the central shaft 31 is made of a conductive material, the central shaft 31 and the conductive ring 21 are connected to the detection upper computer, two ends of the central shaft 31 are respectively connected to the columns 12 on two sides, in order to prevent the lead frame from being conductive integrally, two ends of the central shaft 31 are both mounted and connected through an insulating structure, the arc plates 32 are made of a hard insulating material, and the hard insulating material is ceramic, tempered glass or hard plastic. The arc plates 32 are circumferentially arranged on the outer wall of the central shaft 31, the outer walls of all the arc plates 32 are constructed to form a complete cylindrical surface, wherein probes 33 penetrate through the arc plates 32 at the same intervals along the circumference, the arc length distance of the intervals is the same as the distance between two adjacent transverse rows on the lead frame, and the intervals between the arc plates 32 provided with the probes 33 are adjustable to adapt to the distance between different transverse rows of the lead frame. The interval adjusting mode is as follows: increasing or decreasing the number of other arcuate plates 32 between the arcuate plates 32 on which the probes 33 are provided, and the other arcuate plates 32 are all provided as probes 33; the probes 33 and the central shaft 31 are arranged at intervals in the axial direction, the intervals are the same as the intervals between adjacent pins on the same horizontal row on the lead frame, the probes 33 are made of conductive materials, the rear ends of the probes 33 are in contact with the outer wall of the central shaft 31, the front ends of the probes 33 protrude out of the outer wall of the arc-shaped plate 32 by a preset distance, the probes 33 can stretch and retract along the connecting line direction of the front ends and the rear ends of the probes 33, and the length direction of the probes 33 is consistent with the normal direction of the detection roller group 3.
The supporting rollers 2 and the detection roller sets 3 rotate synchronously and in opposite directions, specifically, the supporting rollers 2 and the detection roller sets 3 can be independently driven to rotate by adopting two independent motors, or the supporting rollers 2 or the detection roller sets 3 can be driven to rotate by utilizing one motor, and then the detection roller sets 3 or the supporting rollers 2 are driven to rotate by arranging a transmission structure; the detection roller group 3 can also be controlled to rotate only by one motor so as to control the rotating speed of the detection roller group to match the rotating speed of the detection roller group with the moving speed of the lead frame, then the supporting roller 2 is driven to rotate by friction force, the motor main shaft and the central shaft 31 are connected in an insulating way, and the specific belt transmission can be realized or an insulating connecting pipe is arranged between the motor main shaft and the central shaft 31.
When the lead frame straightening machine works, a lead frame enters from the supporting roller 2 and the detection roller group 3, the supporting roller 2 and the detection roller group 3 are used for straightening the lead frame, in the process, the supporting roller 2 and the arc-shaped plate 32 are made of hard insulating materials, so that the lead frame can be straightened, the supporting roller 2, the arc-shaped plate 32 and the lead frame cannot be electrified, and a process frame of the lead frame is contacted with the conductive ring 21 in the advancing process of the lead frame, so that the lead frame is electrified or grounded; the advancing speed of the lead frame is synchronous with the rotating speed of the detection roller set 3, and the probes 33 of each arc-shaped plate 32 are induced with the preset pin positions on the same horizontal row on the lead frame one by one through the rotation of the detection roller set 3 in the detection process; when the pin position is qualified, when the probe 33 rolls to the qualified pin, the probe 33 is convenient to contact with the top surface of the pin, the conductive ring 21 is conducted through the lead frame, and the upper computer detects that the conduction signal is received, the pin is free from loss and the position is qualified, and the probe 33 contracts at the same time, so that the pin is prevented from being crushed; when the missing pins exist in the lead frame, the probes 33 directly contact the insulating layer in the middle section of the supporting roller 2 when passing through the positions of the missing pins, so that signals cannot be conducted, and then unqualified prompts are sent out through the detection upper computer; the other common situation is that the pins are not lost and only have the phenomena of bending, tilting and the like, and the pins with the structure are corrected and flattened while passing through the supporting roller 2 and the detection roller group 3, so that the pins return to qualified positions, and therefore, the wrong judgment is avoided, the flow of manual reinspection is reduced, the detection accuracy is improved, and the detection mode only detects the key pins and avoids the influence of other unimportant parts on the detection result.
Preferably, as shown in fig. 3, the front end of the probe 33 is a needle head for contacting with a pin, the diameter of the needle head is smaller than that of the main body of the probe 33 to prevent sliding from the mounting hole of the arc-shaped plate 32, the middle section is of a spring structure to achieve expansion and contraction, and the rear end is provided with a flat plate for increasing the contact range with the central shaft 31.
Preferably, as shown in fig. 6, the arc-shaped plate 32 is provided with a plurality of mounting holes for mounting the probes 33 along the length direction, so that the probes 33 can be conveniently arranged in the mounting holes according to the selection of the distance between the pins of the same transverse plate on the lead frame.
Preferably, as shown in fig. 4 to 6, end caps 34 are provided at both ends of the central shaft 31, the end caps 34 can be locked by nuts, one of the end caps 34 and the central shaft 31 can be designed as an integral structure, only the other end cap 34 is designed as a detachable structure, so that the end cap 34 integral with the central shaft 31 is used to improve the accuracy of the installation position of the arc-shaped plates 32, and further reduce the assembly workload, one side of the end cap 34 facing the middle of the central shaft 31 has a conical hole 341, the conical hole 341 is coaxial with the central shaft 31, and both outer sides of the two ends of the arc-shaped plates 32 have inclined surfaces 321, after the detection roller set 3 is assembled, the inclined surfaces 321 of the arc-shaped plates 32 are attached to the inner walls of the conical holes 341 on the corresponding sides, and this structure can not only utilize the cylindrical end cap 34 to simultaneously compress the arc-shaped plates 32, and utilize the conical hole 341 to keep the arc-shaped plates 32 in a coaxial state with the central shaft 31, but also apply pressure to the arc-shaped plates 32 in the normal direction towards the central shaft 31, so as to make the formation of the arc-shaped plates 32 more regular, and make the contact between the adjacent arc-shaped plates 32 more tight, thereby avoiding the influence of the movement accuracy of the probe 33 caused by the seam.
It is further preferable that, as shown in fig. 6, each of the conical holes 341 of the end cap 34 is provided with a disc 342, and a belleville spring 343 is provided between the disc 342 and the bottom surface of the conical hole 341, so as to provide pre-pressure to the arc-shaped plates 32 during assembly to facilitate assembly and provide reaction force to the nut for locking the end cap 34 through the end cap 34 to prevent the nut from loosening.
Preferably, the distance between the supporting roller 2 and the detection roller group 3 is adjustable to adapt to lead frames with different thicknesses.
More specifically, as shown in fig. 2, the two ends of the central shaft 31 are both provided with a sliding block 35, the sliding block 35 is made of an insulating material, the sliding block 35 is slidably disposed on the upright post 12, the top of the sliding block 35 is rotatably provided with an adjusting screw 36, the adjusting screw 36 penetrates through the top of the upright post 12, the detection roller set 3 can be moved by rotating the adjusting screw 36, so that the distance between the support roller 2 and the detection roller set 3 is adjusted, and the structure realizes an insulating mounting structure at the two ends of the central shaft 31.
Example 2
As shown in fig. 7, a lead frame reshaping detecting device includes a conveying rail 4 and the lead frame reshaping detecting assemblies disclosed in embodiment 1, where the lead frame reshaping detecting assemblies are provided with multiple groups along the conveying direction of the conveying rail 4, and the positions of the lead frame reshaping detecting assemblies along the width direction of the conveying rail 4 are adjustable to adapt to the positions of the leads on different horizontal rows on the same lead frame, such as the lead frame shown in fig. 1, where the direction of an arrow in the figure is the length direction of the lead frame, and the horizontal direction perpendicular to the arrow is the horizontal direction, where a pin c corresponding to a trajectory of a double-dashed line a and a pin d corresponding to a trajectory of a double-dashed line b are in different horizontal rows and do not coincide along the length direction of the lead frame, a group of lead frame reshaping detecting assemblies cannot detect all the leads at the same time, so that multiple groups need to be provided, and in order to adapt to the positions of the pins in different horizontal rows, when the lead frame reshaping detecting assemblies are mounted on the conveying rail 4, the positions of the lead frame reshaping detecting assemblies in the width direction need to be adjusted, so as to meet the inspection work of the pins at different positions, so as to improve the detection efficiency, and the group of the lead frame reshaping detecting assemblies 2 and the lead frame reshaping detecting assemblies can improve the whole.
Further preferably, as shown in fig. 7, an installation groove is formed in the inner wall of the conveying track 4 for connecting the mounting frame 1, a compression screw 41 penetrates through the outer wall of the conveying track 4 corresponding to the installation groove, and the position of the mounting frame 1 in the width direction of the conveying track 4 can be adjusted through the compression screw 41, and the mounting frame 1 can also be compressed, so that the lead frame shape correction detection assembly is fixed.
The foregoing is only a preferred embodiment of the present invention and is not intended to be exhaustive or to limit the invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention.
Claims (10)
1. A lead frame orthopedic inspection assembly, comprising:
the mounting frame (1) is provided with a cross beam (11), and two ends of the cross beam (11) are vertically provided with vertical columns (12) which are parallel to each other;
the two ends of the supporting roller (2) are respectively connected with the upright posts (12) at the two sides, the outer surface of the middle section of the supporting roller (2) is a hard insulating layer, and the outer surface of at least one end of the supporting roller (2) is provided with a conductive ring (21);
the detection roller set (3) is arranged above the supporting roller (2) in parallel and comprises a central shaft (31) and a plurality of arc-shaped plates (32), the central shaft (31) is made of a conductive material, electric signals of the central shaft (31) and the conductive ring (21) are connected with a detection upper computer, two ends of the central shaft (31) are respectively connected with the stand columns (12) on two sides, the arc-shaped plates (32) are made of a hard insulating material, the arc-shaped plates (32) are arranged on the outer wall of the central shaft (31) along the circumference, the outer walls of all the arc-shaped plates (32) form a complete cylindrical surface, probes (33) penetrate through the arc-shaped plates (32) at the same interval along the circumference, and the arc length distance of the interval is the same as the distance between two adjacent transverse rows on the lead frame; the probes (33) and the central shaft (31) are arranged at intervals in the axial direction, the intervals are the same as the intervals between adjacent pins on the same horizontal row on the lead frame, the probes (33) are made of conductive materials, the rear ends of the probes (33) are in contact with the outer wall of the central shaft (31), the front ends of the probes (33) protrude out of the outer wall of the arc-shaped plate (32) for a preset distance, and the probes (33) are arranged in a telescopic mode in the connecting line direction of the front end and the rear end of the length.
2. The lead frame orthotic test assembly of claim 1, wherein the probe (33) has a needle at the front end, a spring configuration at the middle section, and a flat plate at the rear end.
3. Lead frame orthopaedic testing assembly according to claim 1, characterized in that the length direction of the probe (33) coincides with the normal direction of the set of testing rollers (3).
4. The lead frame reshaping test assembly according to claim 1, wherein the arc-shaped plate (32) is provided with a plurality of mounting holes along the length direction for mounting the probes (33).
5. The lead frame reshaping detection assembly according to claim 1, wherein end caps (34) are respectively arranged at two ends of the central shaft (31), a conical hole (341) is respectively formed in one side of each end cap (34) facing the middle of the central shaft (31), the conical holes (341) are coaxial with the central shaft (31), inclined surfaces (321) are respectively formed on the outer sides of two ends of the arc-shaped plate (32), and after the detection roller group (3) is assembled, the inclined surfaces (321) of the arc-shaped plate (32) are attached to the inner walls of the conical holes (341) on the corresponding side.
6. Lead frame orthopaedic detection assembly according to claim 5, characterized in that the conical holes (341) of the end caps (34) are each provided with a disc (342), and a belleville spring (343) is provided between the disc (342) and the bottom surface of the conical hole (341).
7. Lead frame orthopaedic testing assembly according to claim 1 or 5, characterized in that the spacing between the support roller (2) and the set of testing rollers (3) is adjustable.
8. Lead frame shape righting detection assembly according to claim 6, wherein the central shaft (31) is provided with sliding blocks (35) at both ends, the sliding blocks (35) are made of insulating materials, the sliding blocks (35) are slidably arranged on the upright posts (12), the top portions of the sliding blocks (35) are rotatably provided with adjusting screw rods (36), and the adjusting screw rods (36) penetrate through the top portions of the upright posts (12).
9. Lead frame reshaping test device, comprising a conveying track (4) and lead frame reshaping test assemblies according to any one of claims 1 to 8, wherein the lead frame reshaping test assemblies are provided in a plurality of groups along the conveying direction of the conveying track (4), and the positions of the lead frame reshaping test assemblies along the width direction of the conveying track (4) are adjustable.
10. The lead frame shape righting detection device as claimed in claim 9, wherein the inner wall of the conveying rail (4) is provided with a mounting groove for connecting the mounting frame (1), and the outer wall of the conveying rail (4) is provided with a compression screw (41) corresponding to the mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211564164.8A CN115662915B (en) | 2022-12-07 | 2022-12-07 | Lead frame orthopedic detection assembly and device |
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| CN202211564164.8A CN115662915B (en) | 2022-12-07 | 2022-12-07 | Lead frame orthopedic detection assembly and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117483265A (en) * | 2024-01-02 | 2024-02-02 | 四川富美达微电子有限公司 | Lead frame detection equipment and detection sorting method |
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| CN115662915B (en) | 2023-06-02 |
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