KR101848967B1

KR101848967B1 - Apparatus for molding semiconductor devices

Info

Publication number: KR101848967B1
Application number: KR1020140193282A
Authority: KR
Inventors: 임재형
Original assignee: 세메스 주식회사
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2018-04-13
Also published as: KR20160082451A

Abstract

A semiconductor device molding apparatus is disclosed. The apparatus includes a lower mold supporting a substrate on which semiconductor elements are mounted, and an upper mold having a mold cavity for molding the semiconductor elements. The lower mold includes a lower cavity block for supporting the substrate, a port block disposed at one side of the lower cavity block for supplying a resin for molding the semiconductor elements into the mold cavity, A lower chase block for supporting the block and the port block, and an elastic member disposed between the port block and the lower chase block.

Description

[0001] Apparatus for molding semiconductor devices [0002]

Embodiments of the present invention relate to an apparatus for molding semiconductor devices. And more particularly, to a semiconductor device molding apparatus for molding semiconductor devices mounted on a substrate into semiconductor packages using a molding resin.

Generally, a molding process for semiconductor devices can be performed by disposing a substrate on which the semiconductor devices are mounted in a mold and injecting a molding resin such as an epoxy resin into the mold cavity. The apparatus for performing the molding process may include a transfer molding method of injecting molten resin or liquid resin into the mold cavity, and a method of supplying molding resin, molten resin or liquid resin in powder form into the cavity, And a compression molding type apparatus for compressing and molding the molding resin between a mold and a lower mold.

As an example of the above transfer molding apparatus, Korean Patent Laid-Open Nos. 10-2001-0041616 and 10-2006-0042228 disclose transfer molding apparatuses including an upper mold and a lower mold for molding semiconductor elements .

The molding apparatus may include an upper mold having a lower mold supporting the substrate and a mold cavity for molding the semiconductor elements. The lower mold may include a lower cavity block for supporting the substrate, a port block for supplying the molding resin, and the substrate may be disposed on the lower cavity block.

After the substrate is positioned on the lower cavity block, the upper mold and the lower mold may be coupled to each other by a press mechanism, and then the molding resin may be supplied into the mold cavity through the port block.

The upper mold may include an upper cavity block including the mold cavity and a curl block located at one side of the upper cavity block. The curl block may be positioned above the port block. A lower surface of the curl block may include a well region for temporarily storing the molding resin and a runner and a gate for transferring the molding resin to the mold cavity.

Meanwhile, after the molding process for the semiconductor elements is completed, a digging process may be performed to remove the curled portion formed by the molding resin remaining in the well region. The digging process may be performed by cutting a portion between the mold portion surrounding the semiconductor elements and the curl portion and breaking the gate portion between the mold portion and the curl portion.

However, in recent years, in order to manufacture a semiconductor package to be applied to a flexible display, a wearable device, or the like, a soft silicone resin or a clean EMC is used instead of a conventional black epoxy molding compound as a molding resin There may arise a problem that the curled portion is cut without cutting the gate portion in the above-mentioned digging process due to the ductility of the molding resin. In this case, the curled portion may partially remain on the substrate, and a separate grinding process for removing the curled portion may be additionally performed.

It is an object of the present invention to provide a semiconductor device molding apparatus in which a digging process can be continuously performed after a molding process is completed in order to solve the above problems.

According to embodiments of the present invention, the semiconductor element molding apparatus may include a lower mold supporting a substrate on which semiconductor elements are mounted, and an upper mold having a mold cavity for molding the semiconductor elements, The mold includes a lower cavity block for supporting the substrate, a port block disposed at one side of the lower cavity block for supplying a resin for molding the semiconductor elements into the mold cavity, A lower chase block for supporting the port block, and an elastic member disposed between the port block and the lower chase block.

According to embodiments of the present invention, the upper surface of the port block may be positioned higher than the upper surface of the lower cavity block.

According to embodiments of the present invention, the upper edge portion of the port block may protrude toward the lower cavity block, and one side edge portion of the substrate may be positioned below the protruded edge portion of the port block .

According to embodiments of the present invention, one edge portion of the upper surface of the substrate may be closely contacted with the protruded edge portion of the port block when the upper mold and the lower mold are coupled.

According to embodiments of the present invention, an alignment hole for aligning the position of the substrate may be provided on the other edge of the substrate, and the lower mold may further include an alignment pin inserted into the alignment hole of the substrate. have.

According to embodiments of the present invention, the lower mold may further include a movable block configured to support the alignment pin and the other side edge portion of the substrate and movable in a horizontal direction, A recess into which the block is inserted may be provided.

According to embodiments of the present invention, a second elastic member may be disposed between the movable block and the inner surface of the recess.

According to embodiments of the present invention, the semiconductor device molding apparatus may further include a pushing member for pushing the movable block in a horizontal direction so that one side edge portion of the substrate closely contacts the side surface of the port block.

According to embodiments of the present invention, the pushing member may have a wedge shape mounted on the upper mold and having an inclined surface to push the movable block in the process of joining the upper mold and the lower mold.

According to embodiments of the present invention, the upper mold may include an upper cavity block disposed on the upper portion of the lower cavity block, and a curl block disposed on the upper portion of the port block, When the mold is coupled, the curl block presses the port block downward to lower the port block.

According to the embodiments of the present invention as described above, the port block is elastically supported on the lower chase block, the port block is moved downward by the curl block when the upper mold and the lower mold are coupled, The edge portion may be positioned below the protruding edge portion of the port block. Further, after the completion of the molding process, the upper mold and the lower mold are separated from each other, so that the port block can be raised. Accordingly, the mold portion formed on the substrate and the curled portion formed on the port block are automatically separated .

Particularly, since the gate portion between the mold portion and the curl portion can be automatically cut even in the case of a molding resin of a silicone type having softness or a clean EMC as well as a black EMC, the degating process and the removal It is not necessary to perform a separate grinding process. As a result, the time and cost required for manufacturing the semiconductor packages can be greatly reduced.

1 is a schematic block diagram illustrating a semiconductor device molding apparatus according to an embodiment of the present invention.
FIGS. 2 to 6 are schematic diagrams for explaining a semiconductor device molding process using the semiconductor device molding apparatus shown in FIG. 1. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with reference to the accompanying drawings showing embodiments of the invention. However, the present invention should not be construed as limited to the embodiments described below, but may be embodied in various other forms. The following examples are provided so that those skilled in the art can fully understand the scope of the present invention, rather than being provided so as to enable the present invention to be fully completed.

When an element is described as being placed on or connected to another element or layer, the element may be directly disposed or connected to the other element, and other elements or layers may be placed therebetween It is possible. Alternatively, if one element is described as being placed directly on or connected to another element, there can be no other element between them. The terms first, second, third, etc. may be used to describe various items such as various elements, compositions, regions, layers and / or portions, but the items are not limited by these terms .

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, all terms including technical and scientific terms have the same meaning as will be understood by those skilled in the art having ordinary skill in the art, unless otherwise specified. These terms, such as those defined in conventional dictionaries, shall be construed to have meanings consistent with their meanings in the context of the related art and the description of the present invention, and are to be interpreted as being ideally or externally grossly intuitive It will not be interpreted.

Embodiments of the present invention are described with reference to schematic illustrations of ideal embodiments of the present invention. Accordingly, changes from the shapes of the illustrations, e.g., changes in manufacturing methods and / or tolerances, are those that can be reasonably expected. Accordingly, the embodiments of the present invention should not be construed as being limited to the specific shapes of the areas illustrated in the drawings, but include deviations in shapes, the areas described in the drawings being entirely schematic and their shapes Is not intended to illustrate the exact shape of the area and is not intended to limit the scope of the invention.

FIG. 1 is a schematic structural view for explaining a semiconductor device molding apparatus according to an embodiment of the present invention, and FIGS. 2 to 6 illustrate a semiconductor device molding process using the semiconductor device molding apparatus shown in FIG. Are schematic diagrams.

Referring to FIG. 1, a semiconductor device molding apparatus 100 according to an exemplary embodiment of the present invention may be used to perform a molding process for semiconductor devices 20 mounted on a substrate 10. The semiconductor device molding apparatus 100 includes an upper mold 300 having a lower mold 200 for supporting the substrate 10 and a mold cavity 302 for molding the semiconductor devices 20 .

The lower mold 200 includes a lower cavity block 210 for supporting the substrate 10 and a lower cavity block 210 disposed on one side of the lower cavity block 210, A port block 220 for supplying a molding resin 30 for molding the lower cavity block 210 and a lower chase block 230 for supporting the lower cavity block 210 and the port block 220 .

The upper mold 300 includes an upper chase block 310, an upper cavity block 320 mounted on a lower portion of the upper chase block 310 and disposed above the lower cavity block 210, And a curl block 330 mounted on the upper chase block 310 and disposed on the upper portion of the port block 220.

According to an embodiment of the present invention, the lower mold 200 may include a pair of lower cavity blocks 210 and a port block 220 disposed between the lower cavity blocks 210 The upper mold 300 may include a pair of upper cavity blocks 320 and a curb block 330 disposed between the upper cavity blocks 320.

In particular, the port block 220 may be elastically supported on the lower chase block 230 in the vertical direction. For example, an elastic member 240 such as a spring may be disposed between the port block 220 and the lower chase block 230. Specifically, the port block 220 may be in an elevated state by the elastic member 240. After the substrate 10 is loaded on the lower cavity block 210, the lower mold 200, The curl block 330 may lower the port block 220 by pressing the port block 220 downward while the upper mold 300 and the upper mold 300 are coupled to each other by a press mechanism (not shown).

The upper surface of the port block 220 may be positioned higher than the upper surface of the lower cavity block 210 and one side edge portion of the substrate 10 may be positioned on the upper surface of the port block 220 It can be brought into close contact with the side surface.

The substrate 10 can be transferred between the lower mold 200 and the upper mold 300 by a substrate loader and then loaded on the lower cavity block 210. At this time, an alignment hole 12 for aligning the position of the substrate 10 may be provided on the other edge of the substrate 10, and on the lower cavity block 210, An alignment pin 250 to be inserted may be provided.

According to an embodiment of the present invention, the lower mold 200 may include a movable block 260 configured to be movable in a horizontal direction on the lower cavity block 210, and the alignment pins 250, The other side edge portion of the substrate 10 may be supported by the movable block 260. In particular, the lower cavity block 210 may include a recess into which the movable block 260 is inserted, and the movable block 260 may be movable in a horizontal direction within the recess .

For example, a second elastic member 270 such as a spring may be disposed between the movable block 260 and the inner surface of the recess. The semiconductor device molding apparatus 100 may be configured such that the substrate 10 is loaded on the lower cavity block 210 and the movable block 260 and then transferred to the movable block 260. [ And one side edge portion of the substrate 10 may be in close contact with one side surface of the port block 220 by the pushing member 340. [

According to an embodiment of the present invention, the pushing member 340 may be mounted on the upper mold 300. In the course of coupling the lower mold 200 and the upper mold 300, the movable block 260 A wedge shape having an inclined surface for pushing the wedge. However, the pushing member 340 may have the shape of a pin mounted to the upper mold 300 so as to be inclined at a predetermined angle. Alternatively, the pushing member 340 may be provided with a movable block 260 by using a driving unit such as a pneumatic cylinder, It may be moved in the horizontal direction.

Particularly, the upper edge portion of the port block 220 may protrude toward the lower cavity block 210, and one edge portion of the substrate 10 may be protruded from the port block 220 by the pushing member 340. [ 220, respectively. The edge of one side of the substrate 10 may be brought into close contact with the edge of the protruded edge of the port block 220 by the engagement of the upper mold 300 and the lower mold 200. That is, the substrate 10 is moved in the horizontal direction by the pushing member 340 while the lower mold 200 and the upper mold 300 are coupled to each other, So that one side edge portion of the substrate 10 protrudes from the protruded upper edge portion of the port block 220 and one side surface of the port block 220 and the lower surface of the lower cavity block 210, It can be stably fixed.

The port block 220 may be provided with a port through which the molding resin 30 is supplied and a plunger 222 for supplying the molding resin 30 into the mold cavity 302 May be disposed. As an example, a tablet-like molding resin or a liquid molding resin may be supplied to the port. In particular, as the molding resin 30, a molding resin of a silicone type having softness as well as a black EMC or a clean EMC may be used.

The curl block 330 may include a well region 332 in which the molding resin 30 is temporarily stored and a runner and a gate connecting the well region 332 and the mold cavity 302 . The molding resin 30 may be injected into the mold cavity 301 through the well region 332, the runner, and the gate.

Hereinafter, a semiconductor device molding process performed by the semiconductor device molding apparatus 100 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2, a substrate 10 transferred between the lower mold 200 and the upper mold 300 may be loaded on the lower cavity block 210 and the movable block 260. [ At this time, the alignment pins 250 on the movable block 260 may be inserted into the alignment holes 12 of the substrate 10.

Referring to FIG. 3, the lower mold 200 and the upper mold 300 may be coupled to each other by a press mechanism. In the process, the movable block 260 is moved by the pushing member 340, And the port block 220 may be moved downward by the curl block 330. In this case, As a result, one side edge portion of the substrate 10 is stably fixed between the protruded upper edge portion of the port block 220, one side of the port block 220 and the lower cavity block 210 .

4 and 5, as the plunger 222 inside the port block 220 rises, the molding resin 30 passes through the well region 332 of the curl block 330, the runner and the gate Can be injected into the mold cavity 302, so that the semiconductor elements 20 can be packaged by the molding resin 30.

After the molding process for the semiconductor elements 20 is completed, the lower mold 200 and the upper mold 300 can be separated. 6, the port block 220 can be raised by the elastic member 240 as the lower mold 200 and the upper mold 300 are separated from each other, And can be moved away from the port block 220 by the second elastic member 270.

The mold part 40 corresponding to the mold cavity 302 and the curl part corresponding to the well area 332 and the runner are formed by the upward movement of the port block 220 and the horizontal movement of the substrate 10, 50 can be separated from each other. Particularly, since the curled portion 50 is located above the port block 220, the gate portion between the curled portion 40 and the curled portion 50 can be accurately cut.

According to the embodiments of the present invention as described above, the port block 220 is elastically supported on the lower chase block 230, and when the upper mold 300 and the lower mold 200 are coupled, the curl block 330 The port block 220 may be moved downward by a predetermined distance from the edge of the port block 220 and one side edge portion of the substrate 10 may be positioned below the protruding edge portion of the port block 220. After the completion of the molding process, the upper mold 300 and the lower mold 200 are separated from each other, so that the port block 220 can be lifted. As a result, the mold part 40 And the curled portion 50 formed on the port block 220 can be automatically separated.

Particularly, since the gate portion between the mold portion 40 and the curled portion 50 can be automatically cut even in the case of a molding resin of a silicone type having softness or a clean EMC as well as a black EMC, It is not necessary to perform a separate grinding process for removing the curled portion. As a result, the time and cost required for manufacturing the semiconductor packages can be greatly reduced.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

10: substrate 20: semiconductor element
30: Molding resin 100: Semiconductor device molding device
200: lower mold 210: lower cavity block
220: Port block 230: Lower chase block
240: elastic member 250: alignment pin
260: movable block 270: second elastic member
300: upper mold 310: upper chase block
320: upper cavity block 330: curl block
340: pushing member

Claims

A lower mold supporting a substrate on which semiconductor elements are mounted; And
And an upper mold having a mold cavity for molding the semiconductor elements,
A lower cavity block supporting the substrate;
A port block disposed at one side of the lower cavity block for supplying a resin for molding the semiconductor elements into the mold cavity;
A lower chase block for supporting the lower cavity block and the port block; And
And an elastic member disposed between the port block and the lower chase block,
A recess is formed in the other side of the lower cavity block, a movable block configured to be movable in a horizontal direction is disposed in the recess, and an alignment pin configured to be inserted into the alignment hole formed in the substrate, Wherein the semiconductor device is a semiconductor device.

The apparatus of claim 1, wherein an upper surface of the port block is positioned higher than an upper surface of the lower cavity block.

3. The semiconductor device molding apparatus according to claim 2, wherein an upper edge portion of the port block protrudes toward the lower cavity block, and a side edge portion of the substrate is positioned below the protruding edge portion of the port block. .

4. The semiconductor device molding apparatus of claim 3, wherein one edge portion of the upper surface of the substrate is in close contact with an edge of the protruding edge of the port block when the upper mold and the lower mold are coupled.

delete

3. The semiconductor device molding apparatus according to claim 2, wherein a second elastic member is disposed between the movable block and the inner surface of the recess.

The semiconductor device molding apparatus according to claim 7, further comprising a pushing member for pushing the movable block in a horizontal direction so that one side edge portion of the substrate is in close contact with a side surface of the port block.

9. The semiconductor device molding apparatus of claim 8, wherein the pushing member is mounted on the upper mold and has a wedge shape having an inclined surface to push the movable block in the process of joining the upper mold and the lower mold.

The method as claimed in claim 1,
An upper cavity block disposed above the lower cavity block; And
And a curl block disposed above the port block,
Wherein the curl block pushes the port block downward to lower the port block when the upper mold and the lower mold are coupled.