CN115662915B - Lead frame orthopedic detection assembly and device - Google Patents
Lead frame orthopedic detection assembly and device Download PDFInfo
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- CN115662915B CN115662915B CN202211564164.8A CN202211564164A CN115662915B CN 115662915 B CN115662915 B CN 115662915B CN 202211564164 A CN202211564164 A CN 202211564164A CN 115662915 B CN115662915 B CN 115662915B
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- 230000000399 orthopedic effect Effects 0.000 title claims abstract description 22
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- 239000000758 substrate Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 7
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- 238000004026 adhesive bonding Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
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Abstract
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 upright posts are arranged at two ends of the cross beam; the two ends of the supporting roller are respectively connected with the upright posts on the 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 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 upright posts on two sides, the arc plates are made of hard insulating materials, the arc plates are circumferentially arranged on the outer wall of the central shaft, the outer walls of all the arc plates are constructed to form a complete cylindrical surface, and conductive probes are arranged in the arc plates at the same intervals along the circumference in a penetrating mode. The lead frame can be used for detecting pins while the lead frame is orthopedic, and the lead frame has higher detection efficiency.
Description
Technical Field
The invention belongs to the technical field of semiconductor device substrate production detection, and particularly relates to a lead frame orthopedic detection assembly and device.
Background
Semiconductor devices are typically formed on metal lead frames, which are typically stamped from copper sheets, and in order to improve the production efficiency and yield of a single lead frame, a plurality of semiconductor device package regions are arranged in an array on most lead frames, and each package region has a plurality of pins. When the semiconductor device is packaged, gluing, core-pointing, jumper wire assembling or other lead frame overlapping are performed on the pins, and then the final single semiconductor device is formed through the procedures of solid welding, plastic packaging, blanking and the like. After the lead frame is stamped, the lead frame needs to be shaped and inspected before the semiconductor package. The purpose of the correction is to enable all 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 spotting; the detection is mainly used for judging whether the pins on one lead frame are missing or not, so that whether the lead frame is used continuously or scrapped for recovery is determined.
The existing detection device is usually carried out in a visual comparison mode, namely, firstly, a photo of a qualified lead frame is stored in a detection system, then, based on the photo, the photo is scanned or photographed through a visual system, the detection system compares the acquired photo with the reference photo, and if the difference exists, a prompt is sent. However, the inspection method must be performed after the lead frame is shaped, otherwise, the inspection structure will be affected by deformation of the pins of the lead frame even other parts, that is, the inspection method does not allow any part of the lead frame to be missing or deformed, even the part outside the semiconductor packaging area, so that the defective product still has qualified pins, and the quality of the semiconductor finished product is not affected. In order to reduce scrapping of the lead frame, a manual re-checking link is required to be arranged, so that the detection accuracy is low, and the production efficiency of the detection link is affected; and the way also needs to be provided with an orthopedic device independently, thereby increasing the investment of equipment and cost.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the lead frame shape correction detection assembly and the lead frame shape correction detection device, which can detect pins while correcting the lead frame, have low equipment investment and high detection efficiency, and do not need manual rechecking.
In order to achieve the object of the invention, the following scheme is adopted:
a lead frame orthopedic detection assembly, comprising: mounting bracket, backing roll and detection roller group.
The mounting frame is provided with a cross beam, and two ends of the cross beam are vertically provided with mutually parallel upright posts;
the two ends of the supporting roller are respectively connected with the upright posts on the 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 plates, wherein 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 upright posts on two sides, the arc plates are made of hard insulating materials, the arc plates are circumferentially arranged on the outer wall of the central shaft, the outer walls of all the arc plates are constructed to form a complete cylindrical surface, probes are arranged in the arc plates at equal intervals along the circumference in a penetrating way, and the arc length distance of the intervals is equal to the interval between two adjacent transverse rows on the lead frame; the axial direction of the probe center shaft is arranged at intervals, the intervals are the same as the intervals between adjacent pins on the same horizontal row on the lead frame, the probe is made of conductive materials, the rear end of the probe is contacted with the outer wall of the center shaft, the front end of the probe protrudes out of the outer wall of the arc plate by a preset distance, and the probe is telescopic along the connecting line direction of the front end and the rear end of the length;
the support roller is synchronized with the detection roller set and rotates in the opposite direction.
Further, the front end of the probe is a needle head, the middle section is a spring structure, and the rear end is provided with a flat plate.
Further, the length direction of the probe is identical to the normal direction of the detection roller group.
Further, the arc plate is provided with a plurality of mounting holes for mounting the probes along the length direction.
Further, both ends of the center shaft are provided with end covers, one side of the end covers, facing the center of the center shaft, is provided with conical holes, the conical holes are coaxial with the center shaft, the outer sides of both ends of the arc-shaped plates are provided with inclined planes, and after the detection roller set is assembled, the inclined planes of the arc-shaped plates are attached to the inner walls of the conical holes on the corresponding sides.
Further, discs are arranged in the conical holes of the end covers, and butterfly springs are arranged between the discs and the bottom surfaces of the conical holes.
Further, the distance between the supporting roller and the detecting roller set is adjustable so as to adapt to lead frames with different thicknesses.
Further, both ends of the central shaft are provided with sliding blocks which are made of insulating materials, the sliding blocks are arranged on the stand columns in a sliding mode, the top portions of the sliding blocks are provided with adjusting screws in a rotating mode, and the adjusting screws penetrate through the top portions of the stand columns.
The lead frame shape correction detection device comprises a conveying rail and the lead frame shape correction detection components, wherein a plurality of groups of lead frame shape correction detection components are arranged along the conveying direction of the conveying rail, and the position of the lead frame shape correction detection components along the width direction of the conveying rail is adjustable.
Further, the mounting groove is formed in the inner wall of the conveying track and used for being connected with the mounting frame, and the pressing screw is arranged on the outer wall of the conveying track in a penetrating mode corresponding to the mounting groove.
The invention has the beneficial effects that:
1. the supporting roller and the detection roller set can correct the lead frame and the pins, so that false detection judgment is avoided, the manual re-detection process 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 occurrence of error detection is avoided.
2. The utility model can finish the orthopedics and detection simultaneously, and can reduce the investment of equipment and reduce the cost.
Drawings
The drawings described herein are for illustration of selected embodiments only and not all possible implementations, and are not intended to limit the scope of the invention.
Fig. 1 shows a schematic partial structure of a lead frame.
Fig. 2 shows a preferred structural schematic of the lead frame orthopedic inspection 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 a structural exploded view 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 entire structure of the inspection roller set of the present application.
Fig. 7 shows a schematic structural view of a preferred embodiment of the lead frame orthopedic testing device of the present application.
The marks in the figure: the device comprises a mounting frame-1, a cross beam-11, an upright post-12, a supporting roller-2, a conductive ring-21, a detection roller set-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 rail-4 and a compression screw-41.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, but the described embodiments of the present invention are some, but not all embodiments of the present invention.
Example 1
As shown in fig. 2 to 6, a lead frame orthopedic detection assembly includes a mounting frame 1, a support roller 2 and a detection roller set 3.
Specifically, as shown in fig. 2, the mounting frame 1 has a cross beam 11, and two ends of the cross beam 11 are vertically provided with mutually parallel columns 12.
Specifically, as shown in fig. 2, two ends of the supporting roller 2 are respectively connected to the upright posts 12 on two sides, the outer surface of the middle section of the supporting roller 2 is a hard insulating layer, and at least one outer surface of one end of the supporting roller 2 is provided with a conductive ring 21. The hard insulating layer can be made of ceramic, toughened glass or hard plastic.
Specifically, as shown in fig. 2 to 6, the detecting roller set 3 is disposed above the supporting roller 2 in parallel, and includes a central shaft 31 and a plurality of arc plates 32, the central shaft 31 is made of conductive material, the central shaft 31 and the electric signals of the conductive ring 21 are all connected with the detecting upper computer, two ends of the central shaft 31 are respectively connected with the upright posts 12 on two sides, in order to prevent the whole conductive detecting assembly of the lead frame from being conductive, two ends of the central shaft 31 are all installed and connected through an insulating structure, the arc plates 32 are made of hard insulating material, and the hard insulating material is ceramic, toughened 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 are penetrated in the arc plates 32 at equal intervals along the circumference, the arc length distances of the intervals are the same as the intervals between two adjacent transverse rows on the lead frame, and the intervals between the arc plates 32 provided with the probes 33 are adjustable so as to adapt to the intervals between the different transverse rows of the lead frame. The interval adjustment mode is as follows: increasing or decreasing the number of other arcuate plates 32 between the arcuate plates 32 provided with the probes 33, while the other arcuate plates 32 are each provided with the probes 33; the probes 33 and the central shaft 31 are arranged at intervals along the axial direction, the intervals are the same as the intervals between the 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 plate 32 by a preset distance, the probes 33 can stretch along the connecting line direction of the front end and the rear end of the length, and the length direction of the probes 33 is consistent with the normal direction of the detection roller set 3.
The supporting roller 2 and the detecting roller set 3 are synchronous and rotate in opposite directions, specifically, the supporting roller 2 and the detecting roller set 3 can be independently driven to rotate by adopting two independent motors, the supporting roller 2 or the detecting roller set 3 can also be driven to rotate by utilizing one motor, and then the detecting roller set 3 or the supporting roller 2 is driven to rotate by arranging a transmission structure; the detecting roller set 3 can be controlled to rotate by only one motor so as to control the rotating speed of the detecting roller set, so that the rotating speed of the detecting roller set is matched 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 insulating connecting pipe can be concretely driven by a belt or is arranged between the motor main shaft and the central shaft 31.
During operation, the lead frame enters from the supporting roller 2 and the detecting roller group 3, the supporting roller 2 and the detecting roller group 3 are utilized to rectify the lead frame, and in the process, the supporting roller 2 and the arc plate 32 are made of hard insulating materials, so that the lead frame can be rectified, the supporting roller 2, the arc plate 32, the lead frame and the space between the supporting roller 2 and the arc plate 32 are not electrified, and the technical frame of the lead frame is contacted with the conductive ring 21 during the pushing 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 probe 33 of each arc plate 32 is induced with the upper preset pin position of 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 positions of the pins are qualified, when the probes 33 roll on the qualified pins, the probes 33 are convenient to contact with the top surfaces of the pins, the conducting rings 21 are conducted through the lead frame, the detection upper computer receives a conducting signal to indicate that the pins are not missing and the positions of the pins are qualified, and the probes 33 shrink at the same time, so that the pins are prevented from being crushed; when the missing pins exist in the lead frame, the probes 33 directly contact with the insulating layer at 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 a disqualification prompt is sent out by detecting an upper computer; another common situation is that the pins are not missing, but only have bending, tilting and other phenomena, and the pins with the structure are corrected and flattened while passing through the supporting roller 2 and the detecting roller group 3, so that the pins return to the qualified positions, and error judgment is avoided, so that the flow of manual rechecking is reduced, the detection accuracy is improved, and the detection mode only detects the critical pins, and the influence of other unimportant parts on the detection result is avoided.
Preferably, as shown in fig. 3, the front end of the probe 33 is a needle for contacting the pins, the diameter of the needle is smaller than that of the main body of the probe 33, so as to prevent the needle from sliding down from the mounting hole of the arc plate 32, the middle section is a spring structure, so as to realize 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 arcuate plate 32 is provided with a plurality of mounting holes along the length direction for mounting the probes 33, so that the probes 33 can be conveniently arranged according to the mounting holes which are selected and adapted according to the spacing between the pins of the same transverse plate on the lead frame.
Preferably, as shown in fig. 4 to 6, both ends of the central shaft 31 are respectively provided with an end cap 34, the end caps 34 can be locked by nuts, one end cap 34 and the central shaft 31 can be designed into an integral structure, and the other end cap 34 can be designed into a detachable structure, so that the accuracy of the mounting position of the arc plate 32 is improved by using the end cap 34 integral with the central shaft 31, the assembly workload can be reduced, one side of the end cap 34 facing the middle of the central shaft 31 is provided with a conical hole 341, the conical hole 341 is coaxial with the central shaft 31, both outer sides of the two ends of the arc plate 32 are respectively provided with an inclined surface 321, after the detection roller set 3 is assembled, the inclined surfaces 321 of the arc plate 32 are attached to the inner walls of the conical holes 341 on the corresponding sides, the structure can not only simultaneously compress the arc plate 32 by using the end caps 34, but also can keep the state of the arc plate 32 coaxial with the central shaft 31 by using the conical hole 341, and exert pressure on the arc plate 32 facing the central shaft 31 along the normal direction, thereby ensuring that the cylindrical surface formed by the arc plate 32 is more regular, and the contact between adjacent arc plates 32 is tighter, so that the influence of the seam on the movement accuracy of the probe 33 is avoided.
Further preferably, as shown in fig. 6, the circular discs 342 are disposed in the conical holes 341 of the end cover 34, and the belleville springs 343 are disposed between the circular discs 342 and the bottom surfaces of the conical holes 341, so that pre-compression force is provided for the arc plates 32 to facilitate assembly during assembly, and reaction force is provided for the nuts of the locking end cover 34 through the end cover 34 to prevent the nuts from loosening.
Preferably, the distance between the supporting roller 2 and the detecting roller set 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 slider 35, the slider 35 is made of an insulating material, the slider 35 is slidably disposed on the upright post 12, the top of the slider 35 is rotatably provided with an adjusting screw 36, the adjusting screw 36 passes through the top of the upright post 12, the detecting roller set 3 can be moved by rotating the adjusting screw 36, and thus, the distance between the supporting roller 2 and the detecting 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 shape-correction testing apparatus includes a conveying track 4 and the lead frame shape-correction testing component disclosed in embodiment 1, in which a plurality of groups of lead frame shape-correction testing components are provided along the conveying direction of the conveying track 4, and the positions of the lead frame shape-correction testing components along the width direction of the conveying track 4 are adjustable to adapt to the positions of the pins on different transverse rows on the same piece of lead frame, as shown in fig. 1, the arrow direction is the length direction of the lead frame, the horizontal direction perpendicular to the arrow is the transverse row direction, the corresponding pin c on the track of the double-line mark a and the corresponding pin d on the track of the double-dot chain line b are in different transverse rows, and are not overlapped along the length direction of the lead frame, and a group of lead frame shape-correction testing components cannot test all the pins at the same time, so that a plurality of groups are required to be provided, and in order to adapt to the positions of the pins in different transverse rows, when the lead frame shape-correction testing components are mounted on the conveying track 4, the positions of the lead frame shape-correction testing components in the width direction of the conveying track 4 need to be adjusted, so as to meet the checking work of the pins in different positions, so as to improve the testing efficiency of the pins in the detecting the lead frame shape-correction testing component, and the plurality of groups and the supporting roller 3.
Further preferably, as shown in fig. 7, a mounting groove is formed in the inner wall of the conveying track 4 and used for connecting the mounting frame 1, the outer wall of the conveying track 4 is provided with a compression screw 41 in a penetrating manner corresponding to the mounting groove, 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 be compressed, so that the lead frame orthopedic detection assembly is fixed.
The foregoing description of the preferred embodiments of the invention is merely exemplary and is not intended to be exhaustive or limiting of the invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (10)
1. A lead frame orthopedic detection 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 mutually parallel upright posts (12);
the two ends of the supporting roller (2) are respectively connected with the upright posts (12) on 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 plates (32), wherein the central shaft (31) is made of conductive materials, electric signals of the central shaft (31) and the conductive rings (21) are connected with the detection upper computer, two ends of the central shaft (31) are respectively connected with the upright posts (12) on two sides, the arc plates (32) are made of hard insulating materials, 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) form a complete cylindrical surface, probes (33) are arranged in the arc plates (32) at equal intervals along the circumference in a penetrating manner, and the arc length distance of the interval is the same as the interval between two adjacent transverse rows on the lead frame; the axis direction interval of probe (33), center pin (31) sets up, and its interval is the same with the interval between the adjacent pin on the same horizontal row on the lead frame, and probe (33) are made by conductive material, and the rear end of probe (33) and the outer wall contact of center pin (31), and the front end protrusion of probe (33) is in arc (32) outer wall preset distance, and probe (33) are along the flexible setting of length front and back end line direction.
2. The lead frame orthopedic detection assembly of claim 1, characterized in that the front end of the probe (33) is a needle, the middle section is a spring structure, and the rear end is provided with a flat plate.
3. The lead frame orthopedic detection assembly according to claim 1, characterized in that the length direction of the probe (33) coincides with the normal direction of the detection roller group (3).
4. The lead frame orthopedic detection assembly of claim 1, characterized in that the arcuate plate (32) is provided with a plurality of mounting holes along the length for mounting probes (33).
5. The lead frame orthopedic detection assembly according to claim 1, characterized in that end caps (34) are arranged at two ends of the central shaft (31), conical holes (341) are formed in one sides of the end caps (34) facing the middle of the central shaft (31), the conical holes (341) are coaxial with the central shaft (31), inclined surfaces (321) are formed in the outer sides of two ends of the arc plate (32), and after the detection roller set (3) is assembled, the inclined surfaces (321) of the arc plate (32) are attached to the inner walls of the conical holes (341) on the corresponding sides.
6. The lead frame orthopedic detection assembly according to claim 5, characterized in that discs (342) are arranged in conical holes (341) of the end caps (34), and belleville springs (343) are arranged between the discs (342) and the bottom surfaces of the conical holes (341).
7. A lead frame orthopedic detection assembly according to claim 1 or 5, characterized in that the distance between the support roller (2) and the detection roller set (3) is adjustable.
8. The lead frame orthopedic detection assembly according to claim 6, wherein both ends of the central shaft (31) are provided with sliding blocks (35), the sliding blocks (35) are made of insulating materials, the sliding blocks (35) are slidably arranged on the upright posts (12), and an adjusting screw (36) is rotatably arranged at the top of the sliding blocks (35), and the adjusting screw (36) penetrates through the top of the upright posts (12).
9. A lead frame shape-correcting inspection device, characterized by comprising a conveying track (4) and the lead frame shape-correcting inspection assembly according to any one of claims 1-8, wherein the lead frame shape-correcting inspection assembly is provided with a plurality of groups along the conveying direction of the conveying track (4), and the position of the lead frame shape-correcting inspection assembly along the width direction of the conveying track (4) is adjustable.
10. The lead frame orthopedic detection device according to claim 9, characterized in that a mounting groove is formed in the inner wall of the conveying rail (4) and used for being connected with the mounting frame (1), and a compression screw (41) is arranged on the outer wall of the conveying rail (4) in a penetrating manner corresponding to the mounting groove.
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| 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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| CN115662915B true CN115662915B (en) | 2023-06-02 |
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