JP2012104687A - Manufacturing method for electronic components - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing electronic components efficiently by dividing a mother block into individual chips and reliably forming a plurality of aggregation divided block having a holding member that holds the chips in multiple number in a prescribed unit.SOLUTION: A plurality of aggregation divided blocks 10b are formed as follows: holding a mother block 10 on an adhesive face of a first holding member of a composite member 20, the composite member 20 having a first holding member 1 including an adhesive face 1a for holding the mother block 10 to be pasted on an adhesive face 2a of a second holding member 2; performing a first cut process for penetrating the mother block to be cut at a depth halfway through the first holding member before reaching the second holding member in thickness direction; and performing a second cut process for penetrating the mother block and the first holding member to be cut at a depth on halfway through the second holding member in the thickness direction to form a plurality of aggregation divided blocks 10b in which the mother block is divided into a plurality of chips 10a and the chips are integrally held by the first holding member in a prescribed unit.

Description

  The present invention relates to a method for manufacturing an electronic component, and more particularly to a method for manufacturing an electronic component manufactured through a process of dividing a mother block held on a holding member into individual chips.

  When an electronic component such as a chip-type multilayer ceramic capacitor is manufactured, for example, as shown in FIG. 9A, a mother block 51 including a plurality of chips (multilayer ceramic capacitor elements) is held by a holding member 52. Then, there is a method of manufacturing an electronic component through a process of cutting using a cutting blade and dividing into individual chips 53 as shown in FIG.

  In this method, when the mother block 51 is cut and the individual chips 53 integrally held by the holding member 52 are processed in the next step, an assembly of the individual chips 53 from which the mother block 51 has been cut ( Since the dimensions are too large if the aggregate block is left as it is, taking into consideration workability, as shown in FIG. 9C, the aggregated block 54 should be divided into a certain size before being used for the next step. Is done.

  However, in this method, if the assembly block in which the individual chips are held together by the holding member is divided using scissors or a cutting blade in another process, a new process and equipment are provided. There is a problem that productivity is reduced, and there is a problem that chips near the division part (cut line) for dividing the aggregate block are damaged and cause a quality defect.

  In addition, a method using an adhesive sheet having a two-layer structure or a multi-layer structure as a holding member has been proposed. For example, Patent Document 1 discloses a method in which a work (mother block) is fixed by an adhesive sheet having a two-layer structure and the work is cut.

In the method of Patent Document 1, as the holding member, for example, a heat-foaming type pressure-sensitive adhesive sheet is used for the first layer (upper layer side), and an extensible sheet is used for the second layer (lower layer side). A layered holding member is used, and the workpiece is held on the holding member. And when cutting and dividing the workpiece, after cutting to the depth penetrating the first layer (upper layer side), the second layer (lower layer side) is extended to provide a gap between the workpieces The first layer is foamed by applying heat, and the workpiece is peeled off and collected.
According to this method, since heat is applied after providing a gap between the workpieces, it is supposed that reattachment of the workpiece after cutting can be prevented.

  However, in the case of this method, after dividing into individual chips, heat is applied to foam the first layer (upper layer side) thermal foaming type pressure-sensitive adhesive sheet so that the workpiece is separated and separated into individual chips. Therefore, there are cases where individual chips are separated and processing in the next process cannot be performed efficiently.

  In addition, after dividing into individual chips, if the assembly block is divided using scissors or cutting blades in another process, new processes and equipment are required as in the case of the conventional method described above. Thus, there is a problem that productivity is lowered, and there is a problem that a chip in the vicinity of a division part (cut line) for dividing the aggregate block is damaged and causes a quality defect.

  On the other hand, in Patent Document 2, as a holding member, for example, a non-colored adhesive sheet (non-colored surface layer) is used for the first layer (upper layer side), and metal ions are used for the second layer (lower layer side). A method is shown in which a holding member having a two-layer structure using a colored sheet to which a pigment containing a pigment is added is used, and a semiconductor wafer is held on the holding member and cut.

  In this method, when cutting the semiconductor wafer, by cutting from the semiconductor wafer side to the non-colored surface layer on the upper layer side of the holding member, by causing the sensor to recognize the color when the groove after cutting is viewed from above, It is possible to accurately recognize the groove position at the time of pickup or the like. In the case of the method of Patent Document 2, the first layer is a non-colored layer to which a pigment containing metal ions is not added, so that the color component caught in the waste at the time of cutting reacts with the chip and the chip is contaminated. It is said that it will not end up.

  However, even in the method of Patent Document 2, it is suggested that after cutting the semiconductor wafer, the chip is moved by a pickup method, and each chip is handled individually. In some cases, it is not possible to efficiently perform the processing.

  Also, in the case of the method of Patent Document 2, when the assembly block is divided using scissors or a cutting blade in another process, a new process is performed as in the case of the conventional method. There is a problem that equipment is required and productivity is lowered, and there is a problem that a chip near the division part (cut line) for dividing the aggregate block is damaged and causes a quality defect. .

Japanese Patent Laid-Open No. 11-1671 JP 2003-221564 A

  The present invention solves the above-described problem. The mother block held by the holding member is divided into individual chips, and the assembly block in which the individual chips are integrally held by the holding member is divided. An object of the present invention is to provide a method of manufacturing an electronic component that is capable of efficiently forming a plurality of assembly divided blocks in which a plurality of chips are held by a holding unit by a predetermined number of units and that is excellent in productivity. .

In order to solve the above problems, a method for manufacturing an electronic component according to the present invention includes:
In a method of manufacturing an electronic component comprising a step of dividing a mother block into a plurality of chips,
A first holding member having an adhesive surface for holding the mother block is bonded to the adhesive surface of the second holding member having an adhesive surface for holding the first holding member. Forming a member;
A step of attaching a mother block that is divided into a plurality of chips by cutting on the adhesive surface of the first holding member;
Cut along a predetermined cut line from the mother block side through the mother block to reach the middle of the thickness direction of the first holding member, but at a depth that does not reach the second holding member A first cutting step of performing,
A second cutting step of cutting along a predetermined cutting line at a depth that penetrates the mother block and the first holding member and reaches the middle of the thickness direction of the second holding member from the mother block side. And
By performing the first cutting step and the second cutting step, the mother block is divided into a plurality of chips, and the divided chips are integrally held by the first holding member by a predetermined number of units. And a process for forming a plurality of aggregate divided blocks.

  In the electronic component manufacturing method of the present invention, it is preferable that the mother block is divided into individual chips in the first cutting step.

  Further, in the second cutting step, it is preferable that the chip is divided into a plurality of aggregate division blocks in which the chip is integrally held by a predetermined number of units by the first holding member.

  In the present invention, the mother block is preferably a laminate formed by laminating ceramic green sheets on which internal electrodes are formed.

  Moreover, it is preferable that the chip | tip obtained through the said 1st cut process and a 2nd cut process has a structure where the internal electrode was exposed to the cut end surface.

  Further, the planar area of the composite holding member is larger than the planar area of the mother block, and when the mother block is pasted on the adhesive surface of the first holding member constituting the composite holding member, It is preferable that the entire lower surface of the composite holding member is supported by the composite holding member and the composite holding member protrudes from the periphery of the mother block.

  In the method of manufacturing an electronic component according to the present invention, the first holding member of the composite holding member in which the first holding member having the adhesive surface for holding the mother block is attached to the adhesive surface of the second holding member. A mother block that is divided into a plurality of chips by cutting is pasted on the adhesive surface, and passes through the mother block from the mother block side in the thickness direction of the first holding member along a predetermined cut line. A first cutting step for cutting at a depth that does not reach the second holding member, but penetrates the mother block and the first holding member from the mother block side along a predetermined cut line. Then, the second cutting step is performed in which the cutting is performed at a depth that reaches the middle of the thickness direction of the second holding member, the mother block is divided into a plurality of chips, and the divided chips are a predetermined unit. Since it has a process of forming a plurality of aggregate divided blocks that are held together by the first holding member several times, the mother block is divided into individual chips, and the plurality of divided chips are It is possible to efficiently form a plurality of assembly divided blocks held by the holding member by a predetermined number of units, and the productivity of electronic parts can be improved.

In the present invention, there is no special restriction on the order of performing the first cutting step and the second cutting step,
(a) After carrying out the first cut process, when carrying out the second cut process,
(b) After performing the predetermined number of times of the first cutting step, performing the second cutting step, and further performing the predetermined number of times of the first cutting step,
(c) The case where the second cutting step is performed first, and then the first cutting step is performed, and other aspects are also included.

In the mother block, the region to be cut in the second cutting step is provided with a region for the second cutting step (cutting margin). It is also possible to adopt a mode having a margin portion that does not have to be.
In the present invention, the holding member having a multi-layer structure may include at least a first holding member and a second holding member, for example, a third holding member that is a lower layer of the second holding member. Also good.

  In addition, when the mother block is divided into individual chips in the first cutting step, the stable first cutting step is performed, and the individual shape of the mother block is high and the cutting surface is clean. Therefore, it is possible to divide efficiently into two, which is preferable.

Further, in the second cutting step, when the chip is divided into a plurality of aggregate division blocks in which the predetermined number of chips are integrally held by the first holding member, the plurality of divided chips are predetermined. It becomes possible to efficiently form a plurality of aggregate divided blocks held by the holding member by the number of units.
In the second cut process, the same cut line as in the first cut process may be used as a cut line, and the cut line may be further cut, and a line different from the cut line in the first cut process may be used as a cut line. A cut may be made.

  Further, when the mother block is a laminated body formed by laminating ceramic green sheets on which internal electrodes are formed, it is preferable because it is possible to efficiently produce a laminated ceramic electronic component such as a laminated ceramic capacitor.

  In addition, when the chip obtained through the first cutting step and the second cutting step has a structure in which the internal electrode is exposed on the cut end face, the end face is damaged in the conventional manufacturing method, and the product characteristics are deteriorated. In some cases, the electronic component having desired characteristics can be efficiently manufactured according to the present invention.

  Further, when the planar area of the composite holding member is made larger than the planar area of the mother block and the mother block is attached on the adhesive surface of the first holding member constituting the composite holding member, the lower surface of the composite holding member When the whole is supported by the composite holding member and the composite holding member protrudes from the periphery of the mother block, the composite holding is performed when handling the mother block, the assembly block, and the divided assembly block. The protruding portion of the member can be gripped and handled without damaging the mother block or the chip, and the present invention can be further improved.

It is a front view which shows the structure of the holding member of the two-layer structure used in the Example (Example 1) of this invention. It is a front view which shows the state which carried out adhesion holding of the mother block on the composite holding member of 2 layer structure in Example 1 of this invention. It is a top view which shows the state which carried out adhesion holding of the mother block on the composite holding member of 2 layer structure in Example 1 of this invention. It is a front view which shows the state which coat | covered the surface of the 1st holding member of the composite holding member of the 2 layer structure used in Example 1 of this invention with the coating sheet. It is a figure which shows the state which implemented the 1st cut process with respect to the mother block by the method concerning Example 1 of this invention. It is a figure which shows the state which implemented the 2nd cut process with respect to the mother block by the method concerning Example 1 of this invention. It is a top view which shows the state which divided | segmented the mother block into the several aggregate division | segmentation block by the method concerning Example 1 of this invention. It is sectional drawing which shows the structure of the electronic component (multilayer ceramic capacitor) manufactured by the method of this invention. (a), (b), (c) is a figure which shows the manufacturing method of the conventional electronic component.

  Embodiments of the present invention will be described below to describe the features of the present invention in more detail.

[Preparation of mother block and composite holding member]
First, a mother block that is an aggregate of chips (unfired chips) to be electronic components is prepared.
In the first embodiment, the mother block is formed by laminating a ceramic green sheet having an internal electrode pattern and a ceramic green sheet for an outer layer having no internal electrode pattern in a predetermined order. A mother block for manufacturing a multilayer ceramic capacitor, which was divided into individual chips by cutting along a line, was prepared.

  As a method for forming the internal electrode pattern on the ceramic green sheet, various known methods such as ink jet, gravure printing, and screen printing can be used.

  1 to 3, as the composite holding member 20, the first holding member 1 provided with the adhesive surface 1a for holding the mother block 10 (FIG. 2) is bonded to the first holding member 1. The composite holding member 20 was produced by affixing on the adhesion surface 2a of the 2nd holding member 2 provided with the adhesion surface 2a for hold | maintaining.

  In Example 1, a sheet made of a polyester film was used as the first holding member 1. Other constituent materials for the first holding member 1 include polyethylene, polypropylene, polyvinyl chloride, nylon, polystyrene, and the like.

  As the second holding member 2, a sheet made of a polyester film was used. In addition, polyethylene, polypropylene, polyvinyl chloride, nylon, polystyrene, or the like can be used as a constituent material of the second holding member 2.

  Moreover, the adhesive surface 1a of the first holding member was formed by the first adhesive layer 11 made of an adhesive material. In addition, as a material which has adhesiveness, it is possible to use various materials, such as a thermal foaming type, a pressure sensitive type, a UV hardening type, and a cooling peeling type, for example.

Further, the adhesive surface 2a of the second holding member was formed by the second adhesive layer 12 made of an adhesive material. As the material constituting the second adhesive layer, the same material as that constituting the first adhesive layer can be used.
However, in the cutting process of the mother block 10 and the like, it is necessary that the first holding member 1 has an adhesive force and a holding force so that the first holding member 1 does not peel from the second holding member 2.

  On the other hand, since the second holding member 2 is peeled from the first holding member 1 after the first cutting step and the second cutting step are performed on the mother block 10, It is desirable that it can be easily peeled off. From such a viewpoint, for example, an inexpensive pressure-sensitive adhesive is suitably used as the constituent material of the second adhesive layer 12. In the case where the second adhesive layer 12 is peeled off from the first adhesive layer 11, the adhesive force of the second adhesive layer 12 is configured to be weaker than the adhesive force of the first adhesive layer 11. It is desirable that

  In Example 1, in order to secure the adhesiveness of the adhesive surface 1a of the first holding member 1 until the mother block 10 is adhesively held, as the composite holding member 20, as shown in FIG. The thing provided with the coating sheet 30 which coat | covers and protects the adhesion surface 1a (namely, the surface of the 1st adhesion layer 11) of the 1st holding member 1 was used.

[Retain Mother Block]
After peeling off the covering sheet 30 (FIG. 4) that protects the adhesive surface 1a of the first holding member 1 of the composite holding member 20 produced as described above, as shown in FIGS. A mother block 10 to be divided into a plurality of chips by being cut is pasted on the adhesive surface 1a of the 1 holding member 1 and is adhesively held.

  In this embodiment, the composite holding member 20 is configured to support the entire lower surface of the mother block 10 and to be larger than the planar area of the mother block 10. When the mother block 10 is affixed on the adhesive surface 1a of the 1 holding member 1, the composite holding member 20 protrudes from the periphery of the mother block 10 (see FIGS. 2 and 3).

[Cut mother block]
(a) As shown in FIG. 5, from the upper surface side of the mother block 10 held by the composite holding member 20, the first adhesive layer 11 including the first adhesive layer 11 passes through the mother block 10 along a predetermined cut line. The first holding member 1 is cut to a depth that reaches the middle of the thickness direction but does not reach the second holding member 2. This cutting step corresponds to the first cutting step in the present invention.
By the cutting in the first cutting step, a first cut groove C1 is formed (FIG. 5), and the mother block 10 is divided into a plurality of individual chips (unfired chips) 10a.

In this example, the mother block 10 was cut by a dicing method using a dicing blade.
However, the cutting of the mother block 10 is not limited to the dicing method, and can be performed by various methods such as a pressing method using a cutting blade and a laser processing method. The same applies to the second cutting step described below.

(b) Next, as shown in FIG. 6, the mother block 10 and the first holding member 1 including the first adhesive layer 11 are penetrated from the upper surface side of the mother block 10 along a predetermined cut line. The second holding member 2 including the second adhesive layer 12 is cut at a depth reaching the middle of the thickness direction. This cutting step corresponds to the second cutting step in the present invention.
A second cut groove C2 is formed by the cutting in the second cutting step (FIG. 6).

  Then, by peeling the second holding member 2 from the first holding member 1, as shown in FIG. 7, the individual chips 10 a divided in the first cutting step are integrated by the first holding member 1 by a predetermined number of units. A plurality of (4 in this embodiment, as shown in FIG. 7) aggregated divided blocks 10b are formed.

  In this embodiment, the mother block (aggregate block) divided into individual chips is divided into four in the second cutting step. However, the present invention is not limited to this, and is divided into two, nine, and sixteen. It is possible to divide into any number of aggregate division blocks.

In this embodiment, the predetermined cut groove C1 (C1a) of the first cut grooves C1 (FIG. 4) formed by performing the first cut process is cut deeper in the second cut process. By doing so, a second cut groove C2 reaching the middle of the thickness direction of the second holding member 2 is formed, and the first holding member 1 is divided by the second cut groove C2, whereby a plurality of aggregate division blocks are formed. 10b was obtained.
However, the cutting position when the first cutting step is performed is not limited to the position where the first cutting groove is formed, and the second cutting is performed at a position where the first cutting groove is not formed. It is also possible to do.

  Then, the individual chips 10a included in the divided assembly division block 10b are subjected to the following processes after the entire assembly division block 10b for necessary processing. For example, in the case of a manufacturing process of a multilayer ceramic capacitor, a chip (unfired capacitor element) is fired under predetermined conditions, and then an external electrode is formed, for example, a chip type having a structure as shown in FIG. A multilayer ceramic capacitor can be obtained. In this multilayer ceramic capacitor, an internal electrode 42 disposed inside a ceramic multilayer body (multilayer ceramic element) 40 is laminated via a ceramic layer (dielectric ceramic layer) 41 which is a dielectric layer, and The ceramic laminate 40 has a structure in which a pair of external electrodes 43a and 43b are alternately provided on both end faces of the ceramic laminate 40 so as to be electrically connected to the internal electrodes 42 exposed on the opposite end face.

  When the mother block is cut by the method shown in the first embodiment, an aggregated divided block having a desired size is obtained by adjusting the position to be cut in the second cutting step (b). This makes it possible to efficiently manufacture electronic components such as multilayer ceramic capacitors.

  Further, in this embodiment, the composite holding member 20 has a larger planar size and plane area than the mother block 10, and when the mother block 10 is adhered and held on the composite holding member 20, the composite holding member 20. When the entire lower surface of the mother block 10 is supported by the composite holding member 20 and the composite holding member 20 protrudes from the periphery of the mother block 10 and the mother block 10 is divided into a plurality of assembly divided blocks 10b, Since the composite holding member 20 protrudes from some sides, the protruding portion 20m (see FIG. 7) of the composite holding member 20 when handling the mother block, the assembly block, and the assembly division block into which the mother block, the assembly block is divided. ) Can be handled without damaging the mother block or chip.

The cut surface where the internal electrode is exposed is the surface on which the external electrode that conducts with the internal electrode is formed and is very delicate. If the cut surface becomes dirty or damaged, the connection between the internal electrode and the external electrode will occur. However, according to the method of the above embodiment, the cut surface should be handled reliably without damaging or damaging it. It is possible to improve productivity without sacrificing product reliability.
Therefore, the electronic component manufacturing method of the present invention shown in the first embodiment is suitable for a case where the mother block 10 includes an internal electrode, and the internal electrode is exposed on the cut surface and requires delicate handling. It can be applied and is particularly meaningful.

  The present invention is not limited to the above-described embodiments. The type of electronic component as a product, the size of the chip when the mother block is divided into a plurality of chips, the number of chips after the division, Within the scope of the invention, regarding the order of performing the cutting step and the second cutting step, the first holding member constituting the composite holding member, the constituent material of the second holding member, the size and number of the assembly divided blocks obtained after the division, etc. It is possible to add various applications and modifications.

DESCRIPTION OF SYMBOLS 1 1st holding member 1a Adhesive surface of 1st holding member 2 2nd holding member 2a Adhesive surface of 2nd holding member 10 Mother block 10a Individual chip | tip 10b Aggregate division | segmentation block 11 1st adhesion layer 12 2nd adhesion layer 20 Composite Holding member 20m Projecting portion of composite holding member 30 Cover sheet C1 First cut groove C1a First cut groove C2 second cut groove at the position where the second cut step is performed 40 Ceramic laminate (multilayer ceramic element)
41 Ceramic layer (dielectric ceramic layer)
42 Internal electrode 43a, 43b External electrode

Claims (6)

In a method of manufacturing an electronic component comprising a step of dividing a mother block into a plurality of chips,
A first holding member having an adhesive surface for holding the mother block is bonded to the adhesive surface of the second holding member having an adhesive surface for holding the first holding member. Forming a member;
A step of attaching a mother block that is divided into a plurality of chips by cutting on the adhesive surface of the first holding member;
Cut along a predetermined cut line from the mother block side through the mother block to reach the middle of the thickness direction of the first holding member, but at a depth that does not reach the second holding member A first cutting step of performing,
A second cutting step of cutting along a predetermined cutting line at a depth that penetrates the mother block and the first holding member and reaches the middle of the thickness direction of the second holding member from the mother block side. And
By performing the first cutting step and the second cutting step, the mother block is divided into a plurality of chips, and the divided chips are integrally held by the first holding member by a predetermined number of units. And a process for forming a plurality of assembly divided blocks.   2. The method of manufacturing an electronic component according to claim 1, wherein in the first cutting step, the mother block is divided into individual chips.   The said 2nd cutting process WHEREIN: The said chip | tip is divided | segmented into the some aggregate | assembly division block by which the said chip | tip was integrally hold | maintained by the predetermined unit number by the said 1st holding member. Manufacturing method of electronic components.   The method for manufacturing an electronic component according to claim 1, wherein the mother block is a laminate formed by laminating ceramic green sheets on which internal electrodes are formed.   5. The electronic component according to claim 1, wherein the chip obtained through the first cutting step and the second cutting step has a structure in which an internal electrode is exposed on a cut end surface. Production method.   The composite holding member has a planar area larger than that of the mother block, and the composite holding member is attached when the mother block is attached onto the adhesive surface of the first holding member constituting the composite holding member. The whole lower surface of the member is supported by the composite holding member, and the composite holding member protrudes from the periphery of the mother block. Manufacturing method of electronic components.

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