Frame structure

Abstract

The utility model discloses a frame structure which comprises a plurality of packaging bodies, and each packaging body comprises a base island and a chip arranged on the base island. A cutting channel connecting rib is arranged between any two adjacent packaging bodies, a plurality of first pins and a plurality of second pins are arranged on the cutting channel connecting rib, the first pins are located on one side of the cutting channel connecting rib and connected with a chip of one packaging body, and the second pins are located on the other side of the cutting channel connecting rib and connected with a chip of the other packaging body. The plurality of second pins are positioned on the other side of the cutting channel connecting rib and are connected with the chip of another adjacent packaging body; the packaging body allows a cutter to cut along the cutting channel connecting ribs, so that the frame structure is divided into a plurality of packaging bodies, and the first pin and the second pin are disconnected. According to the utility model, the frame structure is divided into a plurality of packaging bodies, and the first pin and the second pin can be disconnected at the same time, so that the technological process is simplified, the cost is reduced, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a semiconductor packaging technical field especially relates to a frame structure. BACKGROUND

[0002] QFN is a common integrated circuit packaging form, it has higher integration and good electrical performance. Usually, a plurality of circle pins are arranged on the frame, the pin is fixed through the connecting rib first, then the connecting rib is disconnected to separate the plurality of circle pins, finally the frame is cut into single package.

[0003] However, the package body and the plurality of circle pins are separately processed, and the two processes cannot be combined together, and the process is complicated, and the manufacturing cost and time cost are high. SUMMARY

[0004] In view of the above problems of the prior art, the utility model wants to solve the technical problem, and proposes a frame structure to solve the problem of complicated packaging process in the prior art.

[0005] The utility model solves the technical problem by adopting the technical scheme of a frame structure, which comprises:

[0006] A plurality of package bodies, the package body comprises a base island and a chip arranged on the base island;

[0007] A cutting channel connecting rib is arranged between any two adjacent package bodies, a plurality of first pins and a plurality of second pins are arranged on the cutting channel connecting rib, the plurality of first pins are arranged on one side of the cutting channel connecting rib and connected with the chip of one of the package bodies, and the plurality of second pins are arranged on the other side of the cutting channel connecting rib and connected with the chip of another adjacent package body.

[0008] The package body allows a cutter to cut along the cutting channel connecting rib to divide the frame structure into a plurality of package bodies and disconnect the connection between the first pin and the second pin.

[0009] Further, the plurality of cutting channel connecting ribs are arranged horizontally and vertically, the plurality of cutting channel connecting ribs arranged horizontally are connected head to tail, and the plurality of cutting channel connecting ribs arranged vertically are connected head to tail.

[0010] Further, a pin connecting rib is arranged between the cutting channel connecting rib and the base island, a plurality of inner circle pins and a plurality of outer circle pins are arranged on the front surface of the pin connecting rib, and the inner circle pin and the outer circle pin have a disconnection gap therebetween.

[0011] The back of the pin web is provided with a cutting portion, the pin web allows the cutter to cut along the cutting portion to form a breaking groove connected with the breaking gap.

[0012] Further, the cutter is disc-shaped, the peripheral wall of the cutter can be in contact with the cutting portion, and the cutter is rotated to cut the cutting portion.

[0013] Both ends of each pin web extend outward to form an extension section, and when the cutter cuts to the end of the pin web, at least part of the cutter is above the extension section.

[0014] Further, the extension section away from one end of the pin web is connected with the cutting web.

[0015] Further, a plurality of pin webs are arranged on the frame structure in a horizontal and vertical staggered manner, and any pin web is perpendicular, parallel or in the same straight line with another pin web.

[0016] Further, the breaking groove is filled with green paint.

[0017] Further, the surface of the green paint is flush with the surface of the pin web.

[0018] Further, a plurality of first pins / second pins are distributed equidistantly, a plurality of inner circle pins are distributed equidistantly, and a plurality of outer circle pins are distributed equidistantly.

[0019] Further, each inner circle pin has at least one outer circle pin and at least one first pin or second pin in the same straight line.

[0020] Compared with the prior art, the utility model has at least the following beneficial effects:

[0021] (1) A plurality of cutting webs are arranged on the frame, and a plurality of first pins and a plurality of second pins are arranged on the cutting webs, when the cutting webs are cut, the frame structure can be divided into a plurality of packaging bodies, and the first pins and the second pins are disconnected, so that the two processes of pin division and packaging body division are carried out at the same time, thereby simplifying the process flow, reducing the cost and improving the efficiency.

[0022] (2) When the inner circle pin is connected, no additional web needs to pass through the outer circle pin, the distance between the two outer circle pins can be reduced, the arrangement number of the inner and outer circle pins can be improved, and the product performance can be enhanced.

[0023] (3) The cutter separates the inner ring lead and the outer ring lead completely after cutting the lead webs, even if burrs are generated after cutting, the burrs cannot connect with the lead on the other side through the break groove, thus avoiding short circuit of the inner ring lead and the outer ring lead caused by the burrs.

[0024] (4) The break groove is filled with green paint, thus avoiding tin paste entering the break groove during soldering to cause short circuit of the inner ring lead and the outer ring lead.

[0025] (5) The inner ring lead and the outer ring lead are separated by the cutter, thus replacing the original scheme of separating the inner ring lead and the outer ring lead through etching process, reducing manufacturing process difficulty and manufacturing cost of the package.

[0026] (6) An extension section is arranged at the end of the lead web, the extension section allows the outermost side of the cutter to continue cutting after reaching the end of the lead web, so that the lowest point of the cutter can continue cutting towards the end of the lead web until the lowest point of the cutter cuts to the end of the lead web or directly penetrates the end of the lead web to cut the lead web, thus ensuring complete separation of the inner ring lead and the outer ring lead. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of the frame structure in the embodiment;

[0028] Figure 2 is a schematic view of two adjacent packages in the embodiment;

[0029] Figure 3 is a back view of the package in the embodiment;

[0030] Figure 4 is a sectional view of the lead web in the embodiment;

[0031] In the drawings:

[0032] 100, package; 110, base island; 120, base island web; 130, lead web; 131, separation gap; 132, break groove; 140, first lead; 150, second lead; 160, inner ring lead; 170, outer ring lead; 180, cutting path web. DETAILED DESCRIPTION

[0033] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0034] Please refer to Figures 1-4 The utility model discloses a frame structure, comprising:

[0035] a plurality of packages 100, each of the packages 100 comprising a base island 110 and a chip disposed on the base island 110;

[0036] a plurality of first pins 140 and a plurality of second pins 150 disposed on the scribe lane webs 180, the plurality of first pins 140 being disposed on one side of the scribe lane webs 180 and connected to the chip of one of the packages 100, the plurality of second pins 150 being disposed on the other side of the scribe lane webs 180 and connected to the chip of another adjacent package 100;

[0037] the packages 100 allowing a cutter to cut along the scribe lane webs 180 to separate the frame structure into the plurality of packages 100 and disconnect the first pins 140 and the second pins 150.

[0038] In particular, the present application provides a plurality of scribe lane webs 180 disposed on the frame, and a plurality of first pins 140 and a plurality of second pins 150 disposed on the scribe lane webs 180, so that the frame structure can be separated into a plurality of packages 100 and the first pins 140 and the second pins 150 can be disconnected when the scribe lane webs 180 are cut, thereby realizing simultaneous separation of the pins and the packages 100, simplifying the process flow, reducing the cost, and improving the efficiency.

[0039] More particularly, on the same scribe lane web 180, the plurality of first pins 140 are disposed on one side and the plurality of second pins 150 are disposed on the other side, thereby ensuring that the first pins 140 and the second pins 150 can be completely separated after the scribe lane web 180 is disconnected. When the scribe lane web 180 is disconnected, the plurality of first pins 140 belong to one of the packages 100 and are connected to the chip of the package 100, and the plurality of second pins 150 belong to another adjacent package 100 and are connected to the chip of the package 100.

[0040] Further, the plurality of scribe lane webs 180 are arranged in a horizontal and vertical staggered manner, the plurality of scribe lane webs 180 arranged horizontally are connected end to end, and the plurality of scribe lane webs 180 arranged vertically are connected end to end.

[0041] In particular, the plurality of scribe lane webs 180 are arranged in a horizontal and vertical staggered manner, and the plurality of scribe lane webs 180 arranged on the same line are connected end to end, so that the cutter only needs to cut horizontally or vertically multiple times without needing to change direction in a single cutting process, thereby facilitating the cutting process.

[0042] Further, a pin connecting rib 130 is arranged between the cutting track connecting rib 180 and the base island 110, and the front surface of the pin connecting rib 130 is provided with a plurality of inner ring pins 160 and a plurality of outer ring pins 170, and the inner ring pins 160 and the outer ring pins 170 have a disconnection gap 131 therebetween.

[0043] The back surface of the pin connecting rib 130 is provided with a cutting portion, and the cutter is allowed to cut along the cutting portion to form a disconnection groove 132 connected with the disconnection gap 131.

[0044] Specifically, a plurality of pin connecting ribs 130 are arranged at the outer ring of the base island 110, and the inner ring pins 160 and the outer ring pins 170 are arranged on the two sides of the front surface of the pin connecting rib 130 respectively, and the inner ring pins 160 and the outer ring pins 170 have a disconnection gap 131 therebetween; the back surface of the pin connecting rib 130 is provided with a cutting portion, and a cutter is used to cut the pin connecting rib 130 along the cutting portion, thereby forming a disconnection groove 132 connected with the disconnection gap 131. That is, after the pin connecting rib 130 is cut by the cutter, the connection between the inner ring pins 160 and the outer ring pins 170 is disconnected.

[0045] The above arrangement of the present application realizes the arrangement of the inner and outer ring pins 170, and when the inner ring pins 160 are connected, no additional connecting rib is needed to pass through the gap between the outer ring pins 170, the distance between the two outer ring pins 170 can be reduced, the number of arranged inner and outer ring pins 170 can be increased, and the product performance can be improved. At the same time, since no additional connecting rib is needed to pass through the gap between the two outer ring pins 170, no half-etching area needs to be arranged on the front surface of the frame, and the process is simplified. Furthermore, after the cutter cuts the pin connecting rib 130, the inner ring pins 160 and the outer ring pins 170 are completely separated, and even if burrs are generated after cutting, these burrs cannot connect with the pins on the other side through the disconnection groove 132, thereby avoiding the short circuit between the inner ring pins 160 and the outer ring pins 170 caused by cutting burrs.

[0046] Further, the cutter is disc-shaped, and the peripheral wall of the cutter can be in contact with the cutting portion, and the cutter is rotated to cut the cutting portion.

[0047] The two ends of each pin connecting rib 130 respectively extend outward to form an extension segment, and when the cutter cuts to the end of the pin connecting rib 130, at least part of the cutter is above the extension segment.

[0048] It should be noted that the cutter is disc-shaped, and through the rotation of the disc-shaped cutter, the peripheral wall is moved and the pin connecting rib 130 is cut. However, because the cutter is disc-shaped, the part that acts on the cutting is only the lowest point of the side wall. When the outermost side of the cutter is just at the end of the pin connecting rib 130, the lowest point of the cutter has not yet cut to the end of the pin connecting rib 130, and there is a problem that the cutter cannot continue to cut, but the pin connecting rib 130 has not been completely cut off.

[0049] Based on this, an extension section is arranged at the end of the pin connecting rib 130, which can allow the outermost side of the cutter to continue to cut after reaching the end of the pin connecting rib 130, so as to make the lowest point of the cutter continue to cut towards the end of the pin connecting rib 130 until the lowest point of the cutter cuts to the end of the pin connecting rib 130, or directly passes through the end of the pin connecting rib 130, so as to cut off the pin connecting rib 130, and ensure that the inner ring pins 160 and the outer ring pins 170 are completely disconnected.

[0050] Furthermore, the disconnection of the inner ring pins 160 and the outer ring pins 170 is realized by the cutter, so as to replace the original scheme of disconnecting the inner and outer ring pins 170 by etching process, and the manufacturing process difficulty and manufacturing cost of the package are reduced.

[0051] Further, one end of the extension section away from the pin connecting rib 130 is connected with the cutting channel connecting rib 180.

[0052] Further, a plurality of pin connecting ribs 130 are arranged on the frame structure in a horizontal and vertical staggered manner, and any pin connecting rib 130 is perpendicular to, parallel to, or in the same straight line with another pin connecting rib 130.

[0053] Specifically, a plurality of pin connecting ribs 130 are arranged in the same straight line, and the extension sections at the ends of the adjacent two pin connecting ribs 130 are connected with each other, and the cutter only needs to cut in the same direction when cutting, without needing to turn multiple times, so as to reduce the cutting difficulty.

[0054] Further, the break groove 132 is filled with green paint.

[0055] Specifically, the break groove 132 is filled with green paint, which can avoid the tin paste in the soldering process from entering the break groove 132 and causing short circuit of the inner ring pins 160 and the outer ring pins 170.

[0056] Further, the surface of the green paint is flush with the surface of the pin connecting rib 130.

[0057] Further, a plurality of the first pins 140 / the second pins 150 are distributed equidistantly, a plurality of the inner ring pins 160 are distributed equidistantly, and a plurality of the outer ring pins 170 are distributed equidistantly.

[0058] Further, each of the inner ring pins 160 has at least one of the outer ring pins 170 and at least one of the first pins 140 or the second pins 150 in line therewith.

[0059] It should be noted that the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship and movement condition between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0060] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0061] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

Claims

1. A frame structure, characterized by, The application relates to a frame structure for packaging a plurality of chips, comprising: a plurality of packages, each of which comprises a base island and a chip arranged on the base island; a plurality of cutting channel webs are arranged between any two adjacent packages, each of which is provided with a plurality of first pins and a plurality of second pins, the plurality of first pins are arranged on one side of the cutting channel web and connected with the chip of one of the packages, and the plurality of second pins are arranged on the other side of the cutting channel web and connected with the chip of the other adjacent package; the packages are cut by a cutter along the cutting channel webs to separate the frame structure into the plurality of packages and disconnect the first pins and the second pins.

2. A frame structure according to claim 1, wherein The plurality of cutting channel webs are arranged in a horizontal and vertical staggered manner, the plurality of horizontally arranged cutting channel webs are connected end to end, and the plurality of vertically arranged cutting channel webs are connected end to end.

3. A frame structure according to claim 1, wherein A plurality of pin webs are arranged between the cutting channel webs and the base islands, the front surface of each of the pin webs is provided with a plurality of inner ring pins and a plurality of outer ring pins, and the inner ring pins and the outer ring pins are separated by a disconnection gap; the back surface of each of the pin webs is provided with a cutting part, and the pin web is cut by the cutter along the cutting part to form a disconnection groove connected with the disconnection gap.

4. A frame structure according to claim 3, wherein The cutter is disc-shaped, the peripheral wall of the cutter is in contact with the cutting part, and the cutter is rotated to cut the cutting part; the two ends of each pin web extend outward to form an extension segment, and at least part of the cutter is above the extension segment when the cutter cuts the end of the pin web.

5. A frame structure according to claim 4, wherein The end of the extension segment away from the pin web is connected with the cutting channel web.

6. A frame structure according to claim 4, wherein A plurality of pin webs are arranged on the frame structure in a horizontal and vertical staggered manner, and any pin web is perpendicular to, parallel to or in the same straight line with another pin web.

7. A frame structure according to claim 3, wherein The disconnection groove is filled with green paint.

8. A frame structure according to claim 7, wherein The surface of the green paint is flush with the surface of the pin web.

9. A frame structure according to claim 3, wherein The plurality of first pins / second pins are distributed equidistantly, the plurality of inner ring pins are distributed equidistantly, and the plurality of outer ring pins are distributed equidistantly.

10. A frame structure according to claim 9, wherein Each of the inner ring pins is in the same straight line with at least one of the outer ring pins and at least one of the first pins or the second pins.

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