JP2571709Y2 - Stacking punch for edging machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch of a trim system used in a trimming process of a semiconductor package. The present invention relates to a stacking punch of a edging machine which can be easily used when manufacturing a semiconductor package having various lead intervals.

[0002]

2. Description of the Related Art In general, when a semiconductor package is manufactured, after a molding process is performed, trimming (T) is performed.
A rimming process is performed to cut and remove each dambar (Dambar) connected to the lead frame to separate the leads of each semiconductor package.

That is, as shown in FIG. 6, in a conventional edging machine, each semiconductor package 2 of a lead frame to be transferred is supported from below, and a lower portion having a groove corresponding to each damper 4 of the lead frame. The work table 1 and a punch 3 installed above the lower work table 1 to cut each of the dam bars of the lead frame at once are provided.

The punch 3 has a cutting punch support 7 as shown in FIG. 7, and cutting plates 6 and 6 'are integrally formed on both sides of the cutting punch support 7, respectively. On the lower side of the cutting plates 6, 6 ', a plurality of cutting tools 5 for cutting the respective dambars, and a semiconductor package 2 are provided.
And a plurality of lead protection grooves 5a for protecting the respective leads are alternately projected.

In the punch of the conventional edging machine configured as described above, the molding of the semiconductor package 2 is completed, and the lead frames connected to the semiconductor packages 2 are placed on the upper surface of the lower work table 1 of the edging machine. When the punch 3 is transported, the punch 3 descends, and the cutting tools 5 below the punch 3 cut and remove all the dambar 4 portions between the lead frame and the semiconductor package 2 at a time.

[0006]

In the punch of such a conventional edging machine, a plurality of cutting tools for cutting a plurality of dambars at a time are formed integrally on a punch support base. If any one of the plurality of cutting tools becomes defective, the entire punch must be replaced, which increases the maintenance and repair cost of the mold and is uneconomical.

Further, when manufacturing a punch used for a semiconductor package having a fine pitch, an expensive and precise die must be manufactured, which is disadvantageous in that it is extremely complicated.

An object of the present invention is to solve the above-mentioned problems,
Provided is a stacking punch for an edging machine in which, when any one of a plurality of cutting tools of a punch is damaged, only the damaged cutting tool can be replaced, and the cost for maintaining the punch is reduced. It is in.

Another object of the present invention is to provide a laminated punch for an edger which can easily manufacture a punch used for manufacturing a fine pitch semiconductor package.

[0010]

According to the present invention, the stacking punch of the edging machine has a plurality of cutting plates each having a cutting tool having the same thickness as the width of the dambar to be cut, and a thinner than the damper width. A plurality of cutting plates having a thickness, a plurality of lead protection plates having a thickness similar to the width of the lead to be protected, and a plurality of compensation plates having a thickness smaller than the width of the lead; Lead protection plate, and the cutting plate, compensation cutting plate, lead protection plate and compensation lead protection plate, select the appropriate cutting, lead protection and compensation plate, stack them and fasten them so that they can be assembled and disassembled Means.

[0011] Preferably, the fastening means is formed with a bolt insertion hole on each side of the cutting plate, the compensation cutting plate, the lead protection plate and the compensation lead protection plate, and a bolt is inserted into the bolt insertion hole. It is good to fasten with a nut.

[0012] Preferably, the fastening means is a position fixing pin for fastening the dambar cutting plate and the lead protection plate.

Further, preferably, the fastening means is a fixed frame for fixing the position for fastening the respective dambar cutting plates and the lead protection plates.

[0014]

According to the present invention, a cutting plate, a lead protection plate,
Since these compensating plates are stacked and fastened according to the dambar to be cut and the lead width to be protected to form a punch of the edging machine, when cutting each dambar connected to the lead frame, each punch is cut by the punch. Dunbars can be cut and removed at once.

In addition, even if any of the cutting plates or the compensating cutting plate is damaged during use, the fastening means of the punch is removed, and only the damaged parts can be replaced, immediately assembled and reused. It is convenient.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 to 5, in the stacking punch of the trimming machine (trim system) according to the present invention, the cutting tools 10, 10 having the same thickness as the dambar width of the lead frame to be cut are provided. A plurality of cutting plates 11, 11 ', 11 ",... Are integrally formed on both sides and project downward, and a plurality of compensating cutting plates having a thickness smaller than the width of the dambar to be cut. 11a are respectively formed. A plurality of lead protection plates 12, 12 '... Having the same thickness as the semiconductor package lead width to be protected are formed, and the compensation lead protection plate 12a having a thickness smaller than the semiconductor package lead width. Are formed.

That is, for example, the lead pitch obtained by adding the dam bar width to the lead width is 0.15 mm lead width + 0.15 mm dam bar width = 0.3 mm lead pitch, 0.25 mm + 0.25 mm = 0.5 mm, 0.4
mm + 0.3mm = 0.7mm, 0.77mm + 0.5
mm = 1.27 mm, 1.54 mm + 1.0 mm = 2.
In various cases of 54 mm, the thickness of the cutting plate 11 is 0.15 mm, 0.25 mm, 0.3 mm, and 0.5 m, respectively.
m, 1.0 mm, and the thickness of the lead protection plate 12 is set to 0.15 mm, 0.25 mm, 0.4 mm, and 0.1 mm, respectively.
The punches can be formed and used by forming them at 77 mm and 1.54 mm, and alternately laminating the cutting plates 11 and the lead protection plates 12 one by one.

In this case, all the cutting plates 11 and the lead protection plates 12 corresponding to various pitches, respectively, are used.
A cutting plate 11 having a cutting tool having a thickness as small as possible in a variety of dambar widths and lead widths without forming each one, and a compensation having a thickness smaller than the damper width. A plurality of cutting plates 11a and a lead protection plate 1 having a thickness similar to the width of the lead as small as possible.
2 and a plurality of compensating lead protection plates 12a having a thickness smaller than the lead width are formed, and the cutting plate 11, the compensating cutting plate 11a, the lead protection plate 12, and the compensating lead protection plate 12a are: The corresponding cutting and protection plates can be selected according to the width of the dambar and the lead to be cut and protected, and the respective plates can be alternately laminated for cutting and protection, fastened and used. .

That is, when the lead pitch is 0.3 mm, one cutting board 11 having a thickness of 0.15 mm is added to the cutting board 11 with a thickness of 0.1 mm.
A single lead protection plate 12 having a thickness of 15 mm is laminated and used. When the lead pitch is 0.5 mm, a new cutting plate 11 and the protection plate 12 are not formed, and the lead protection plate 12 is formed by 0.1 m.
Only the compensating cutting plate 11a and the compensating lead protection plate 12a having a thickness of m are formed, and together with the 0.15 mm-thick cutting plate 11 and the lead protection plate 12 used for the 0.3 mm pitch, It can be used alternately for cutting and protection. In addition, even in the case of the 0.7 mm pitch, two lead protection plates having a thickness of 0.15 mm can be laminated and used without forming the lead protection plate 12 having a thickness of 0.3 mm. .

As described above, the cutting plate 11, the compensating cutting plate 11a, the lead protecting plate 12, and the compensating lead protecting plate 12a are laminated in accordance with the width of the dambar to be cut and the width of the lead to be protected, and then tightened. As shown in FIG. 3, each of the cutting plates 11 and 11a (see FIG. 2) and the lead protecting plate 1
2 and 12a (see FIG. 2), bolt insertion holes 11b and 12b are formed on both sides, respectively.
It is also possible to insert the bolt 14 into the b and 12b and screw it with the nut 15. Further, as shown in FIG. 4, it is also possible to fasten with a pin. Further, as shown in FIG. 5, the fastening can be performed by a fixed frame.

In the stacking punch of the edging machine according to the present invention, the cutting plate 11 and the compensating cutting plate 11a are appropriately set according to the width of the bar and the lead to be cut and protected. , The lead protection plate 12 and the compensation lead protection plate 12a are alternately laminated and fastened to each other, installed on the upper side of the lower work table 1 of the edging machine, and formed on the upper surface of the lower work table 1. When the semiconductor package of the frame is moved, each dambar between the lead frame and the semiconductor package can be cut at once by lowering the punch.

Further, in the punch according to the present invention, the width of the cutting tool 10 is made longer, and the junk portion of the semiconductor package molded product adjacent to the damper can be cut at a stroke.

[0024]

As described above, in the stacking punch of the trimming machine (trim system) according to the present invention, the cutting plate and the lead protection plate and the lead protection plate thereof are set in accordance with the dambar to be cut and the lead width to be protected. A compensating plate and a compensating plate are selected, and can be stacked and fastened. Therefore, when any one of the plurality of cutting tools is damaged, only the damaged cutting tool is replaced and used, and there is an effect that the maintenance cost of the punch can be reduced.

Further, when manufacturing a semiconductor having a fine pitch, a punch is appropriately formed by a thin cutting plate, a lead protection plate and a compensating plate thereof without manufacturing expensive and difficult molds. Since it can be assembled and used, there is an effect that it is extremely simple and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a stacked punch of a edging machine when a compensating plate according to the present invention is not used.

FIG. 2 is a side view showing the stacking punch of the edging machine when the compensating plate according to the present invention is used.

FIG. 3 is a perspective view showing a process of assembling the stacked punch when using the bolt and nut fastening means according to the present invention;

FIG. 4 is a perspective view illustrating an assembling process of the stacked punch when the pin fastening means according to the present invention is used.

FIG. 5 is a perspective view showing a process of assembling the stacked punch when the fixing means of the fixing frame according to the present invention is used.

FIG. 6 is a schematic configuration and operation diagram of a conventional edging machine.

FIG. 7 is an exploded perspective view showing a conventional punch.

[Description of Signs] 10 Cutting tool 11, 11 ', 11 "Cutting plate 11a, 11'a, 11" a Compensating cutting plate 11b, 12b Bolt insertion hole 12 Lead protection plate 12a Compensation lead protection plate 13 Fastening Means 14 Bolt 15 Nut In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (4)

(57) [Scope of request for utility model registration] 1. A laminating punch for an edger (trim system), comprising a plurality of cutting plates (11) each having a cutting tool (10) having a thickness similar to the width of a dambar to be cut. A plurality of compensating cutting plates (11) having a thickness smaller than the dambar width.
a), a plurality of lead protection plates (12) having a thickness similar to the width of the lead to be protected, and a plurality of compensation lead protection plates (12a) having a thickness smaller than the lead width. Cutting plate (11), cutting plate for compensation (11a), lead protection plate (12) and lead protection plate for compensation (12a)
Medium, select the appropriate cutting, lead protection and compensation plate,
Fastening means (13) for stacking and fastening so as to be disassembled
And a stacking punch for an edger. 2. The cutting means (11), wherein the fastening means comprises:
Bolt insertion holes are formed on both sides of the compensating cutting plate (11a), the lead protection plate (12) and the compensation lead protection plate (12a), and the bolts (1) are formed in the bolt insertion holes.
The punch according to claim 1, wherein the punches (4) are inserted and fastened with nuts (15). 3. The stacking punch according to claim 1, wherein said fastening means is a pin for fixing a position for fastening each of the dambar cutting plates and the lead protection plates. 4. The stacking punch according to claim 1, wherein said fastening means is a fixing frame for fixing a position for fastening each of the dambar cutting plate and the lead protection plate.