KR20030064018A - Apparatus for inspecting lead frame - Google Patents

Abstract

PURPOSE: An apparatus for inspecting a leadframe is provided to more rapidly inspect the leadframe by inspecting two leadframes at a time, and to eliminate the necessity of transferring a camera frequently even in a case of a matrix-type leadframe by transferring a camera lens part in an X-Y direction. CONSTITUTION: A fixing frame(10) is positioned at a side part of a transfer rail. The first and second guide rails(20,22) extending in a direction parallel with the transfer rail are formed in a coaxial line of the fixing frame. The first and second transfer frames(12,14) are supported by each guide rail, capable of sliding, horizontally extending in a direction perpendicular to the transfer rail over a leadframe transfer rail. The third and fourth guide rails(36,38) are formed along the extension direction of the first and second transfer frames. The first and second transfer holders(24,26) are capable of sliding along the third and fourth guide rails, positioned right over a leadframe transfer path. A cylindrical camera lens part takes a picture of the quality state of the leadframe right over the leadframe, supported by each transfer holder.

Description

Lead frame inspection device {Apparatus for inspecting lead frame}

The present invention relates to a lead frame inspection apparatus.

A lead frame is one of the key components of a semiconductor package together with a semiconductor chip. This serves as a lead that connects the inside and the outside of the semiconductor package and a frame that supports the semiconductor chip, and may be deformed into various shapes according to high density, high integration, and component mounting methods of the semiconductor chip.

The lead frame typically includes a pad for mounting a semiconductor chip, which is a memory device, to maintain a static state, an internal lead connected to the semiconductor chip by wire bonding, and an external connection for an external circuit. It consists of a structure including an external lead.

The lead frame having such a structure is usually manufactured in a shape by a stamping process or an etching process. In other words, the stamping process is a method of manufacturing a lead frame by punching the thin plate material of the lead frame into a predetermined shape by using a press mold device which is sequentially transferred, and the etching process is suitable for mass production of the lead frame using chemicals. It is a chemical etching method that completes the shape of lead frame by corroding local parts of thin plate material. It is mainly applied to small quantity production.

On the other hand, the lead frame itself is very high precision, the lead frame produced through the production process performs the inspection through the lead frame inspection apparatus.

Usually, the lead frame inspection apparatus includes a transport rail on which a lead frame to be inspected is mounted and transported, and an inspection camera installed on a transport path of the lead frame transported along the transport rail to photograph a quality state of the lead frame.

As known in the art, a lead frame manufactured by the method of manufacturing the lead frame includes a strip type in which a lead frame is arranged in one row and a matrix type in two rows in a thin and long metal strip. It moves the pitch by one pitch, and each lead frame is positioned under the vertical position of the inspection camera for quality inspection.

However, the conventional inspection apparatus has a problem that it takes a long time to inspect the lead frame by one inspection camera, and in particular, the inspection of the matrix type lead frame requires moving the camera frequently. There was a problem that a separate device is needed to accurately select the position of the camera.

The present invention was created in order to solve the above problems, and it is possible to inspect two lead frames at a time at the same time, so that the inspection speed is high. In particular, the camera lens unit can be moved in the XY direction. Even if the camera is set to the correct position once and continue to use, there is no need to move the camera once and for all, the object of the present invention is to provide a lead frame inspection apparatus configured to perform the accurate inspection.

1 is a view schematically showing a lead frame inspection apparatus according to an embodiment of the present invention.

Figure 2 is a front view of the lead frame inspection apparatus according to an embodiment of the present invention.

3 and 4 are diagrams for explaining the operation of the lead frame according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: fixed frame 12: first moving frame

14: 2nd moving frame 16: 1st handle

18: 2nd handle 20: 1st guide rail

22: 2nd guide rail 24: 1st moving holder

26: 2nd movement holder 28: 3rd handle

30: first connection pulley 32: connection pulley

34, 54: Belt 36: 3rd guide rail

38: fourth guide rail 40: fourth handle

42, 44: rotating angle adjusting pulley 46: the first lead screw

48: second lead screw 50, 52: camera lens unit

56: lens pulley 58, 60: unzipping frame

62: pulley swivel handle 64: third lead screw

65: fourth lead screw

In order to achieve the above object, the present invention is to be installed on the transport path of the transport rail to be mounted and transported the lead frame to be inspected to inspect the quality of the lead frame transported along the transport rail, on the side of the transport rail A fixed frame having a coaxial line with the first and second guide rails positioned in one side thereof and extending in a direction parallel to the transfer rail; First and second movable frames supported by the guide rails and slidable and extending horizontally in a direction orthogonal to the conveying rails on the upper part of the lead frame conveying rails and having third and fourth guide rails along the extending direction; First and second moving holders slidable along the third and fourth guide rails and positioned vertically above the lead frame feed path; It is characterized in that it comprises a cylindrical camera lens unit which is supported by each of the moving holder and photographs the quality state of the lead frame from the vertical upper portion of the lead frame.

In addition, a lens pulley is provided on the outer periphery of each camera lens unit so as to focus by rotating the respective camera lens units, and the first and second moving holders extend downward and rotate at a lower end corresponding to the lens pulley. Each of the pulley frame is provided with an angle control pulley, each of the lens pulley and the rotation angle adjustment pulley is characterized in that connected by a belt.

In addition, the lower end of each pulley frame is provided with a rotating means for rotating the rotation angle control pulley, the fixed frame is a lead screw parallel to the first and second guide rails and conveys the first and second moving frames The first and second moving frames may include third and fourth lead screws that are parallel to the third and fourth guide rails and transfer the first and second moving holders.

Hereinafter, one embodiment according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view schematically showing a lead frame inspection apparatus according to an embodiment of the present invention.

As shown, the lead frame inspection apparatus according to the present embodiment is positioned on the upper portion of the rail (R) for guiding the transfer of the lead frame to be inspected, and has a configuration for photographing the lead frame transferred along the rail. .

The lead frame inspection apparatus, the fixed frame 10 and the first and second guide rails 20 and 22 are provided on one side of the rail (R) facing the rail, and the first and second guide rails The first and second moving frames 12 and 14 which are guided while being supported by (20, 22) and are movable in the X direction, and are supported by the first and second moving frames 12 and 14, which are movable in the Y direction. And the first and second moving holders 24 and 26 having camera lens portions 50 and 52 in the lower portion thereof.

The first guide rails 20 and the second guide rails 22 are coaxially positioned as shown in FIG. 2 and are provided one above and one below. The first guide rail 20 guides the X-direction sliding motion of the first moving frame 12, and the second guide rail 22 guides the X-direction sliding motion of the second moving frame 14.

A first guide screw (46 in FIG. 2) is provided between the two first guide rails 20, and a second guide screw (48 in FIG. 2) is also provided between the second guide rails 22. FIG. . The first and second lead screws 46 and 48 move the first and second moving frames 12 and 14 in the X direction as known lead screws.

That is, the first and second moving frames 12 and 14 are connected to the first and second lead screws 46 and 48 and are movable in the arrow X direction by the axial rotation of the lead screw. First and second handles 16 and 18 fixed to the lead screw are provided to move the first and second moving frames 12 and 14 as described above.

The first handle 16 axially rotates the first lead screw 46, and the second handle 18 axially rotates the second lead screw 48. As a result, the first and second moving frames ( X-direction movement of 12 and 14 is performed by the first and second handles 16 and 18. In some embodiments, a motor may be connected to the first and second handles 16 and 18 to control the movement of the first and second moving frames 12 and 14 using an electric signal.

Meanwhile, the first and second moving frames 12 and 14 are horizontally extended in a direction orthogonal to the rail at the top of the rail R, and the third and fourth guide rails 36 and 38 are formed on the opposite surfaces thereof. It is prepared.

As shown in FIG. 2, two third guide rails 36 are installed in the first moving frame 12 to guide the Y-direction sliding movement of the first moving holder 24. Of course, the third guide rails 36 are positioned in parallel with each other.

In addition, a third guide screw (64 in FIG. 2) is provided at the center of the third guide rail 36. The third guide screw 64 is parallel to the third guide rail 36 and a first connection pulley 30 is fixed to an end thereof. The first connecting pulley 30 moves the first moving holder 24 in the Y direction by rotating the third lead screw 64.

In addition, a second connection pulley 32 is provided at the side of the first connection pulley 30. The second connection pulley 32 is supported by the first moving frame 12 and is connected to the first connection pulley 30 and the belt 34. In addition, a third handle 28 is fixed to the second connection pulley 32.

Therefore, when the third handle 28 is rotated, the rotational force of the second connection pulley 32 is transmitted to the first connection pulley 30 through the belt 34 to rotate the lead screw 64. . As a result, the position of the first moving holder 24 in the Y direction can be adjusted by rotating the third handle 28 to the left and right.

Like the first moving frame 12, the second moving frame 14 is provided with two parallel fourth guide rails 38 and four lead screws 65. In addition, a fourth handle 40 is fixed to an end of the fourth lead screw 65. By rotating the fourth handle 40 to the left and right, it is a matter of course that the movement of the second moving holder 26 in the Y direction relative to the second moving frame 14 can be controlled.

As a result, the first and second movement holders 24 and 26 may be moved in the X-Y direction by rotating the first and second handles 16 and 18 and the third and fourth handles 28 and 30 from side to side.

Figure 2 is a front view of the lead frame inspection apparatus according to an embodiment of the present invention.

The same reference numerals as the above reference numerals denote the same members having the same function.

As shown, the first and second guide rails 20 and 22 and the first and second guide screws 46 and 48 are provided at one side of the fixed frame 10 to provide the first and second moving holders 24 and 26. ) Can be moved in the feed direction of the lead screw. In addition, the third and fourth guide rails 36 and 38 and the third and fourth guide screws 64 and 65 are installed in the first and second moving frames 12 and 14, respectively, and the first and second moving holders 24 and 26 are provided. ) Can be transferred in a direction perpendicular to the lead frame transfer direction.

Camera lens parts 50 and 52 are provided below the first and second moving holders 24 and 26, respectively. The camera lens parts 50 and 52 are positioned on the vertical portion of the lead frame and photographed to show the state of the lead frame passing downward. A lens pulley 56 is fixed to the outer circumference of each of the camera lens parts 50 and 52 to focus by rotating the outer circumference of the camera lens part left and right.

Meanwhile, release frames 58 and 60 are fixed to the first and second moving holders 24 and 26. The pulley frames 58 and 60 extend downward while being fixed to the first and second moving holders 24 and 26, and at the lower end thereof, rotation angle adjustment pulleys 42 and 44 and the rotation angle adjustments. It has a pulley rotation handle 62 for rotating the pulleys (42, 44).

The rotation angle adjusting pulleys 42 and 44 are located at a height corresponding to each lens pulley 56 and are connected to the lens pulley 56 through the belt 54. Therefore, by rotating the pulley rotation handle 62, the camera lens unit 56 can be rotated to accurately focus the camera lens.

3 and 4 are views for explaining the operation of the lead frame according to an embodiment of the present invention, Figure 3 shows a state of inspecting the strip-type lead frame, Figure 4 is a matrix type lead frame Shown to examine the appearance.

Referring to FIG. 3, it can be seen that the first and second moving holders 26 and 28 are located in a straight line along the feeding direction of the lead frame L. FIG. In addition, the interval between the first and second movement holders 26 and 28 also maintains an interval corresponding to the interval of each lead frame. As described above, the position adjustment of the first and second moving holders 26 and 28 is made by the first, second, third and fourth handles.

In any case, if the positions of the first and second moving holders 24 and 26 are set, the lead frame R is transferred by two pitches. Since the first and second moving holders 24 and 26 are positioned in the feeding direction of the lead frame, the first and second moving holders 24 and 26 may be moved by two pitches to perform photographing.

Referring to Figure 4, it can be seen that the lead frame (R) of the matrix type is transferred along the rail (R). In order to inspect the lead frame of the matrix type, for example, the second moving holder 26 is moved in the direction of the arrow c so that two rows of lead frames can be simultaneously photographed. At this time, the lead frame is moved by one pitch.

As a result, as described above, the inspection of the two lead frames at the same time can be twice as fast, especially the need to change the position of the camera lens every time, the efficiency of the work is so high.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various deformation | transformation is possible for a person with ordinary knowledge within the scope of the technical idea of this invention.

The lead frame inspection apparatus of the present invention made as described above can inspect two lead frames at a time at the same time, so the inspection speed is high, and in particular, in the case of a matrix type lead frame, the camera lens portion can be moved in the XY direction. Even if the camera is set to the correct position once and continue to use, there is no need to move the camera once and for all, so the accurate shooting can be done.

Claims (3)

It is installed on the conveying path of the conveying rail which is mounted and conveyed the lead frame to be inspected, and inspects the quality state of the lead frame conveyed along the conveying rail, A fixed frame having a coaxial line with first and second guide rails extending in a direction parallel to the transport rail and positioned at a side of the transport rail; First and second movable frames supported by the guide rails and slidable and extending horizontally in a direction orthogonal to the conveying rails on the upper part of the lead frame conveying rails and having third and fourth guide rails along the extending direction; First and second moving holders slidable along the third and fourth guide rails and positioned vertically above the lead frame feed path; And a cylindrical camera lens unit which is supported by each of the moving holders and photographs a quality state of the lead frame in the vertical upper portion of the lead frame. The method of claim 1, A lens pulley is provided on the outer periphery of each camera lens unit so as to focus by rotating the respective camera lens units, and the first and second moving holders extend downward, and at the bottom thereof, a rotation angle control corresponding to the lens pulley is provided. And a pulley frame provided with a pulley, respectively, wherein each lens pulley and the rotation angle adjusting pulley are connected by a belt. The method of claim 2, The lower end of each pulley frame is provided with a rotating means for rotating the rotation angle control pulley, The fixed frame is provided with a lead screw parallel to the first and second guide rails to convey the first and second moving frames, The first and second moving frames are parallel to the third and fourth guide rails, and lead frame inspection apparatus, characterized in that provided with a third, fourth lead screw for conveying the first and second moving holders.