JP3135132B2 - Manufacturing method of green sheet laminate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a green sheet laminate, and more particularly, to a method of manufacturing a green sheet laminate, in which defective products can be easily grasped and the yield and the quality of sintered products can be improved. And a method for producing the same. The present invention
It is used for IC packages, sensors such as oxygen sensors, and green sheet laminates having two or more layers of metallized printed parts such as industrial ceramics.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a green sheet laminate by cutting a laminated green sheet at a predetermined position, cutting is performed by using a cutting mark or other printed portion formed on the outermost green sheet as a mark. There is known a manufacturing method.

[0003]

However, when there are two or more main green sheets, for example, there is a slight gap between the printed patterns, such as a gap caused by a screen mask printing setup. Sometimes occurred. In the method of manufacturing a green sheet laminate, when cutting the laminated green sheet to a predetermined size,
Since the cutting is performed using only the cutting mark or other printed portion formed on the surface of the laminated green sheet as a mark, it is difficult to adjust the cutting, and a cutting defect occurs, or the quality of the sintered product is not sufficient (for example, heat generation). In the case of a pattern, the heat generation becomes non-uniform, etc.).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method of manufacturing a green sheet laminate in which defective products are easily grasped, the yield is improved, and the quality of a sintered product is improved. Aim.

[0005]

According to the method for producing a green sheet laminate of the present invention, two or more green sheets having a metallized printed portion are laminated to produce a laminated green sheet, and thereafter, the laminated green sheet is produced. A green sheet laminate, wherein the cut mark is formed on at least one (preferably two or more ) of the main green sheets having the metallized printed portion, Two or more of the green sheets are stacked so that the cut marks of the green sheet located at a lower layer are exposed and can be visually checked later, and thereafter the green sheets are cut using the cut marks as marks.

The main green sheet means a green sheet having a metallized print portion and requiring alignment between upper and lower layers. The main green sheet is composed of two or more sheets, and the number of laminated sheets is selected according to the purpose, application, desired performance and the like. As a configuration in which the cutting mark is exposed and can be viewed, for example, the first
A first cutting mark is formed in a layer (lower layer), and a portion of the second layer, which is directly above the first cutting mark, is punched out to form a punching opening, and a third laminated layer is formed thereon.
In the layer (upper layer), a portion corresponding to a portion directly above the first cutting mark can also be configured to be a punching opening. Note that this metallized printing section is provided with a predetermined conductive pattern.
Pattern or heat generation pattern.

The main green sheet is a punch.
If a green sheet is provided, this green sheet
Metallized printing section on the base sheet
After that, punching holes are formed at predetermined positions by punching.
It is preferable to manufacture it. Thus, metallization
After the punched hole is formed,
With this, the metallized printing part can be formed up to the ridge of the opening
Therefore, printing design up to the end face of the opening becomes possible,
Product quality can be improved by expanding the conductive area, etc.
Wear. In addition, the flow of metallized ink to the punched holes
Can be prevented from coming into contact with the wiring formed in the lower layer.
Can be prevented.

[0008]

The present invention will be described below in detail with reference to examples. First, a green base sheet (29 × 145 × thickness = 0.2 to 0.9 mm) was prepared, and only a guide pin portion for printing was punched out at a predetermined position by punching. Thereafter, a predetermined pattern was printed on the green base sheet by a screen mask method using metallization (platinum paste). At this time, the screen mask was designed and printed to the inside (L) of about 0.1 mm from the end face of the intended opening as shown by the dotted line in FIG. That is, L is the length of the printed portion to be removed by punching. This printing part is a heater heating pattern,
Its line width is 0.3 mm. Note that a plurality (eight) of line widths are set to 0. 1 at the end farther than the predetermined metallized print portion.
A cutting mark of 15 mm (for example, M _{1 in} FIG. 4) is simultaneously formed.

Then, while positioning using a guide pin (not shown) punched out of the green base sheet, the green base sheet is positioned at the center using a pair of die sets as shown in FIG. A punched hole having a predetermined shape (for example, 4.2 × 4.2 mm) is punched out, has a predetermined printing portion 12 and a hole 11, and is designed to be printed up to the end surface of the target hole. 1 green sheet 1
Was prepared.

As a result, a second green sheet and a third green sheet having metallized printing portions 22 and 32 and punching openings 21 and 31 as shown in FIGS. 3 and 4 were produced as a result. Note that the metallized printed portions 22, 32 formed on these sheets are used as electric wiring patterns. These are all major green sheets. When the first, second, and third green sheets (1, 2, 3) are stacked, the respective cutting marks (M ₁ , M ₂ , M ₃ ) are sequentially located at positions adjacent to each other. Are formed. The sheet to be laminated on the lowermost layer is the green base sheet 4, which has no metallized printed portion and is not the main one, so that no cutting mark is formed.

Next, the first to third green sheets 1, 2, 3 and the green base sheet 4 are laminated while being aligned using guide pins, and the laminated green sheet (129) shown in FIGS. × 145 × 2.6 (thickness)
mm) 5. In this, desired metallized printing sections 12, 22, 32 and punching aperture section 11,
21, 31 are appropriately arranged and the cutting marks M ₁ , M ₂ , M formed on each green sheet ₁ , ₂ , 3
₃ are sequentially arranged adjacently for each of the layers to be laminated. That is, the cut marks M ₁ and M ₂ of the lower green sheet and the cut mark M ₃ on the third green sheet of the surface layer are exposed and visible after the lamination. That is, the cut marks M ₁ and M ₂ can be visually recognized by the concave portions 7 formed by the punching openings 21 and 31.

Thereafter, the three cut marks are cut using the positional relationship as a mark to obtain a green sheet laminate (9.6 × 9.6 × 2.6 (thickness) mm) 6 shown in FIGS.
To produce For example, when there is almost no deviation of the print mark, the cutting is performed along these cutting marks, and when there is a slight deviation, the cutting is performed at the middle of the deviation. Therefore, in the case of cutting in the middle of this deviation, it is possible to obtain a product that can satisfy any of the dimensional standards. In particular, since the deviation of the heater pattern can be reduced, a product excellent in uniform heating can be obtained. However, the deviation of the center position of these cutting marks is 0.075 which is the half value of the line width of 0.15 mm.
If it is not less than mm, defective cutting lines and uneven heating are involved. Thus, even before the cutting step, the judgment can be made visually.

The present invention is not limited to the specific embodiments described above, but can be variously modified within the scope of the present invention according to the purpose and application. That is,
The shape, pattern, size, number, arrangement, and the like of the metallized printing section or the punching opening section can be varied depending on the purpose and application. Further, the method of forming the metallized print portion, the line width, and the type of the metallized material used for the metallized print portion are not limited. Further, the number of laminated main green sheets and the number of used non-main green sheets or green base sheets are not particularly limited, and may be other than those in the above embodiment. In addition, there is no particular limitation on the number of cut marks, the number of cut mark exposing recesses, the location, the shape, and the size (length, etc.).

[0014]

According to the method for manufacturing a laminated green sheet product of the present invention, the cutting marks on each main sheet are exposed and can be visually checked, so that the position of the laminated printing section can be grasped. Good products can be easily grasped. In addition, since it is possible to cut at a predetermined position after grasping the state of this printing unit, it is possible to eliminate a defective product with a large positional deviation of the printing unit of each sheet before cutting, and even if a small amount of this positional deviation occurs, Since the cutting can be performed at a position in consideration of each deviation, it is possible to complete a product that is totally satisfactory as a design after cutting and thus after sintering. Therefore, it is possible to reduce the number of defective products, improve the yield, and improve the quality of the product.

[Brief description of the drawings]

FIG. 1 is a partial plan view of a green sheet having a metallized printing section and a punching opening section manufactured in an example.

FIG. 2 is an explanatory cross-sectional view illustrating a conventional green sheet in which metallized printing ink flows into an opening.

FIG. 3 is a partially explanatory sectional view showing a state before laminating and cutting each green sheet manufactured in the example.

FIG. 4 is a partial plan view showing a state before laminating and cutting each green sheet manufactured in the example.

FIG. 5 is an explanatory sectional view of a laminated green sheet after cutting, which is manufactured in an example.

FIG. 6 is a plan view of the laminated green sheet shown in FIG.

[Explanation of symbols]

1, 2, 3 Green sheet 11, 21, 31 Punching opening 12, 22, 32 Metallized printing section 12a End of metalized printing section (flow-in section) 4 Green base sheet 5 Laminated green sheet 6 Green sheet laminated product 7 Cutting Mark exposure recesses M ₁ , M ₂ , M ₃ Cutting mark L Length of printed portion removed by punching

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B28B 11/12

Claims (1)

(57) [Claims] 1. A laminated green sheet is produced by laminating two or more green sheets having a metallized printed portion,
Thereafter, in a method of manufacturing a green sheet laminate, in which the laminated green sheet is cut using a cutting mark as a mark, the cutting mark is formed on at least one of the main green sheets having the metallized printed portion, and further, after lamination, Stacking two or more green sheets so that the cut marks of the green sheet located in the lower layer are exposed and visible, and then cut using the cut marks as a mark; Production method.