Integrated circuit anti-reverse go-no go gauge
By designing integrated electrical anti-reverse gauges and using differential designs of rectangular slides and chutes, the problem of traditional lead frame tracks lacking anti-reverse treatment is solved, and the effect of effectively preventing direction reversal is achieved, and the quality and applicability of finished products are improved.
Patent Information
- Application Number
- CN202411630024.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-03-18
AI Technical Summary
The traditional lead frame track lacks anti-reverse treatment, which makes it easy for operators to turn the direction of the lead frame backward, thereby damaging the chip or plastic seal and reducing the yield rate.
An integrated circuit anti-reverse gauges are designed, and the body is made of metal material and has a rectangular slide and a rectangular slide chute inside. The height of the slide is greater than the thickness of the plastic seal body, and the height of the slide is less than the thickness of the plastic seal body, but greater than the thickness of the frame body. This design enables the lead frame package structure with the correct direction to pass, while the reverse direction cannot pass, thereby achieving the anti-reverse function.
Effectively prevent the direction of the lead frame packaging structural parts from being reversed, improve the quality of finished products, reduce the defective rate, and is suitable for the transmission and use of lead frame packaging structural parts of a variety of different specifications.
Smart Images
Figure CN119650430A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a conveying channel for an integrated circuit lead frame. Background Art
[0002] As the chip carrier of integrated circuits, the lead frame is a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire) to achieve electrical connection between the internal circuit lead ends of the chip and the external leads to form an electrical circuit. It serves as a bridge connecting the internal chip and the external wires. Lead frames are required in most semiconductor integrated blocks and are an important basic material in the electronic information industry.
[0003] The lead frame packaging structure includes a frame body and a plastic package body coated on the frame body, the lead frame is thinner and the plastic package body is thicker. When the lead frame packaging structure passes through different processing positions through a channel or track, the gap between the channel or track is large, so that both the frame body and the plastic package body can pass through. However, such a setting has disadvantages. The lead frame body and the plastic package body are easily placed upside down, which in turn causes subsequent misprocessing and reduces the yield rate of semiconductor devices.
[0004] The utility model with application number: 2012204399318 relates to the field of semiconductor packaging technology, and more particularly to an anti-reverse semiconductor lead frame, whose structure includes a chip welding area and a pin connected to the chip welding area, and the height difference between the chip welding area and the pin is 0.14mm~0.19mm. During the packaging process, the semiconductor lead frame can provide suitable space for the upper mold cavity and the lower mold cavity of the packaging mold, so that the resin flow speed in the upper and lower mold cavities is the same, and finally the two merge between the upper mold exhaust groove and the lower mold exhaust groove, so that the gas in the upper mold and the lower mold can be discharged smoothly, avoiding the reverse phenomenon of the product. This patent is for the anti-reverse of the product itself, not the anti-reverse of the product channel.
[0005] The invention of application number 2013100570477 discloses a spline stop gauge, which belongs to the field of spline detection technology and is intended to provide a spline stop gauge with reliable positioning, simple and fast detection process, batch detection, high production efficiency, and the ability to detect both the size of the spline and the rotation angle of the spline at the same time, including a cylindrical ring gauge, a detection hole perpendicular to the central axis of the cylindrical ring gauge is provided on the upper section of the cylindrical ring gauge, and an internal spline is provided on the inner cavity wall of the lower section of the cylindrical ring gauge. This invention cannot be used for lead frame detection. Summary of the invention
[0006] Purpose of the invention: The invention overcomes the disadvantage that the traditional lead frame track lacks anti-reverse treatment, and the operator is easy to put the lead frame in the wrong direction, causing damage to the chip or plastic package on the lead frame in the subsequent process. The invention provides an integrated circuit anti-reverse stop gauge which can effectively prevent the lead frame from being put in reverse and is suitable for use in various specifications.
[0007] Technical solution: The main body of the integrated circuit anti-reverse check gauge of the present invention has a rectangular appearance, is made of metal material (such as stainless steel with a hardness greater than copper, not easily scratched by the lead frame, and capable of conducting electricity), and can allow the lead frame packaging structure (composed of a plastic package body and a frame body) to pass through; has a rectangular slide and a rectangular slide groove inside, and the height of the rectangular slide is greater than the height of the rectangular slide groove. The rectangular slide has a notch on the right side (or left side, left and right can be switched), connected to the left side (or right side) of the rectangular slide groove, and both the left and right sides of the rectangular slide groove are open.
[0008] The height of the rectangular slideway is greater than the thickness of the plastic sealing body, the height of the rectangular slide groove is less than the thickness of the plastic sealing body, and the height of the rectangular slide groove is greater than the thickness of the frame body.
[0009] When the lead frame packaging structure passes through, the plastic package body passes through the rectangular slideway and the frame body passes through the rectangular slide groove.
[0010] When the non-through gauge of the present invention is set on the channel where the lead frame packaging structure runs, the one with the correct direction (plastic package body on one side, frame body on the other side) can pass through, and the one with the reverse direction cannot pass through, thereby realizing the anti-reverse function.
[0011] The rectangular slideway of the present invention may have one, two or more mutually nested parts, and correspondingly, the rectangular slide groove may also have one, two or more mutually nested parts, so that the no-go gauge can be applied to lead frame packaging structural parts of various thicknesses.
[0012] That is, the second slideway is sleeved inside the first slideway, or the third slideway is sleeved inside the second slideway; the second slideway is sleeved inside the first slideway, and the third slideway is sleeved inside the second slideway.
[0013] The two or more slideways are tightly fitted on the sides of the notch, and accordingly, the grooves of the two or more slideways are also tightly fitted here, which has three functions: 1) All levels of slides and chutes can maintain electrical connection, and the static electricity on the lead frame plastic package (the plastic package is usually made of polymer materials such as epoxy resin. During transportation, friction will generate charges and form static electricity. These static electricity will have adverse effects on the embedded chips and also interfere with the operators who come into contact with them) can be eliminated through the metal material body.
[0014] 2) They have a common backing to facilitate limit positioning.
[0015] 3) This position is located in the center of the stop gauge, which makes it convenient for lead frame packaging structural parts of different specifications to share the production line channel.
[0016] A through hole is provided on the left side of the body of the stop gauge, and a through hole is also provided on the left side of the slideway accordingly, so as to facilitate the insertion of a limit rod (which is connected with the through hole) from the outside to fix the slideway so that it will not shift forward or backward with the lead frame packaging structure.
[0017] The limit rod is retractable and made of metal (such as stainless steel or copper alloy), and is formed by the sleeve connection of an outer sleeve rod and an inner sleeve rod, and a pressing rod (composed of a pressing spring and a pressing marble) is inserted into one end of the inner sleeve rod perpendicular to the central axis, and the outer sleeve rod is provided with a plurality of axially arranged limit holes (such as a first limit hole, a second limit hole, and a third limit hole). After the pressing marble is manually pressed from one limit hole, the inner sleeve rod can move axially relative to the outer sleeve rod, and the marble moves to another limit hole and then pops out of the limit, so that the length of the pressing rod varies, so that it can be inserted into the left side wall of different slideways (such as the first slideway, the second slideway, and the third slideway), so that the slideway is fixed.
[0018] The limit rod has an additional function, which is to connect the left sides of the slides at each level that are not in contact with the left wall of the stop gauge body (ground) to achieve electrical connection. The charges accumulated at the backing can be electrically neutralized, and have the same potential, further quickly eliminating the charges accumulated in the slides at each level.
[0019] Beneficial effects: The no-go gauge of the present invention can effectively prevent the lead frame packaging structure from being placed in the wrong direction, thereby improving the quality of the finished product and reducing the defective rate.
[0020] Moreover, through the simple and fast socketing of multi-level slideways and slide grooves, it is suitable for the transmission of lead frame packaging structural parts of various specifications.
[0021] By setting up a backrest in the central position, the production line channels can be shared.
[0022] It can eliminate the static electricity generated by the plastic package and effectively protect the chip packaged therein.
[0023] The stretching of the limit rod is simple and quick to operate, making it difficult for the slides at all levels to move or misalign. At the same time, it can eliminate the charge induced by the internal slide from the plastic package, further protecting the safety of the chip and the operator. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of a three-dimensional structure of a main body of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of a stop gauge having a primary structure (a first slideway and a first slide groove); Figure 3 It is a perspective structural diagram of a no-go gauge having a two-stage structure; Figure 4 It is a perspective structural diagram of a no-go gauge having a three-level structure; Figure 5 It is a schematic diagram of a state of the limit rod of the present invention; Figure 6 yes Figure 5 Another state diagram; Figure 7 It is a schematic diagram of the state of the lead frame plastic package of the present invention when passing through.
[0025] In the figure: 1-first slide; 2-second slide; 3-third slide; 4-fourth slide; 5-first slide groove; 6-second slide groove; 7-third slide groove; 8-fourth slide groove; 9-top wall; 10-bottom wall; 11-side wall; 12-first limiting hole; 13-second limiting hole; 14-third limiting hole; 15-limiting rod; 16-pressing spring; 17-pressing marble; 18-positioning hole; 19-plastic sealing body; 20-frame body. DETAILED DESCRIPTION
[0026] Embodiment 1: like Figure 1 The stop gauge shown has a rectangular appearance and is made of 304 stainless steel. It has a rectangular slide (1, 2 or 3) with a larger height and a rectangular slide groove (6, 7 or 8) with a smaller height inside. The rectangular slide (1, 2, 3 or 4) has a notch on the right side, which is connected to the left side of the rectangular slide groove (5, 6, 7 or 8). The left and right sides of the rectangular slide groove (5, 6, 7 or 8) are both open.
[0027] The height of the rectangular slideway (1, 2, 3 or 4) is greater than the thickness of the plastic package body of the lead frame packaging structure, the height of the rectangular slide groove (5, 6, 7 or 8) is less than the thickness of the plastic package body, and the height of the rectangular slide groove (5, 6, 7 or 8) is greater than the thickness of the frame body, allowing the lead frame packaging structure to pass through, and the direction of the lead frame packaging structure is consistent, and the plastic package body and the frame body will not be reversed.
[0028] Embodiment 2: like Figure 2 , 3 The no-go gauge shown in , 4 is made of stainless steel, and has a first 1, second 2 or third rectangular slide 3, a first 5, second 6 or third rectangular slide groove 7 inside, so that the no-go gauge can be suitable for the passage of two or more lead frame packaging structural parts of different thicknesses.
[0029] All rectangular slides (1, 2, 3 or 4) have notches on the right side, which are respectively connected to the left side of their respective rectangular slide grooves (5, 6, 7 or 8), and the left and right sides of each rectangular slide groove (5, 6, 7 or 8) are both open.
[0030] Each specification of the lead frame packaging structure has a plastic package body and a frame body, the height of each rectangular slide (1, 2, 3 or 4) is greater than the thickness of the corresponding plastic package body, the height of each rectangular slide groove (5, 6, 7 or 8) is less than the thickness of the corresponding plastic package body, and the height of each rectangular slide groove (5, 6, 7 or 8) is greater than the thickness of the corresponding frame body.
[0031] The first 1, second 2 and third slideways 3 fit tightly on the sides of the notch and are electrically connected to the body of the stop gauge. The slide grooves (5, 6, 7 or 8) of each slideway (1, 2, 3 or 4) also fit tightly here and are electrically connected to the slide grooves of the body of the stop gauge.
[0032] A through hole is provided on the left side of the body of the stop gauge, and a through hole is correspondingly provided on the left side of the first 1, second 2 or third slide 3, so as to facilitate the insertion of a metal limit rod 15 from the outside, so that each slide (1, 2, 3 or 4) is fixed and electrically connected to the left side of each slide (1, 2, 3 or 4).
[0033] like Figure 5 , 6 As shown, the limit rod 15 can be telescopic, and is formed by an outer sleeve rod and an inner sleeve rod. The inner sleeve rod can move axially relative to the outer sleeve rod, so that the length of the limit rod changes. It is respectively connected and fixed to the first 1, the second 2 or the third slide 3 to prevent forward and backward displacement, and is connected to the stop gauge body to quickly eliminate the accumulated charge.
Claims
1. An integrated circuit anti-reverse check gauge, having a rectangular appearance, made of metal material, capable of allowing a lead frame packaging structure to pass through, the lead frame packaging structure having a plastic package body and a frame body, characterized in that: A rectangular slide (1, 2, 3 or 4) and a rectangular chute (5, 6, 7 or 8) are provided inside, wherein the rectangular slide (1, 2, 3 or 4) has a notch on the right side, connected to the left side of the rectangular chute (5, 6, 7 or 8), and the left and right sides of the rectangular chute (5, 6, 7 or 8) are both open; The height of the rectangular slideway (1, 2, 3 or 4) is greater than the thickness of the plastic package body, the height of the rectangular slide groove (5, 6, 7 or 8) is less than the thickness of the plastic package body, and the height of the rectangular slide groove (5, 6, 7 or 8) is greater than the thickness of the frame body.
2. The integrated circuit anti-reverse check gauge according to claim 1, characterized in that: The rectangular slideway (1, 2, 3 or 4) has two or more mutually nested parts, and correspondingly, the rectangular slide groove (5, 6, 7 or 8) also has two or more mutually nested parts, so that the no-go gauge can be suitable for the passage of two or more lead frame packaging structural parts of different thicknesses.
3. The integrated circuit anti-reverse check gauge as claimed in claim 2, characterized in that: The two or more slideways (1, 2, 3 or 4) are tightly fitted at the side of the notch, and correspondingly, the slide grooves (5, 6, 7 or 8) of the two or more slideways (1, 2, 3 or 4) are also tightly fitted at this location.
4. The integrated circuit anti-reverse check gauge according to claim 1, characterized in that: A through hole is provided on the left side of the body of the stop gauge and is vertically oriented inward. Correspondingly, a through hole is also provided on the left side of the slideway (1, 2, 3 or 4) to facilitate the insertion of a metal limit rod (15) from the outside, thereby fixing the slideway (1, 2, 3 or 4) and achieving electrical connection with the left side of the slideway (1, 2, 3 or 4) to eliminate the electric charge accumulated in the slideway (1, 2, 3 or 4).
5. The integrated circuit anti-reverse check gauge as claimed in claim 4, characterized in that: The limit rod (15) is telescopic and is formed by an outer sleeve rod and an inner sleeve rod being sleeved together, and a pressing rod is inserted into one end of the inner sleeve rod perpendicular to the central axis; the pressing rod is composed of a pressing spring (16) and a pressing marble (17), and has a plurality of axially arranged limit holes (12, 13 or 14) on the outer sleeve rod. The inner sleeve rod can move axially relative to the outer sleeve rod, and the marble (17) moves to another limit hole (12, 13 or 14) and then pops out to limit, so that the limit rod can achieve precise length adjustment.