JPH06163734A - Flat package and its production - Google Patents

Abstract

PURPOSE:To provide a reliable flat package by equipping a base where single or multi-gapped recessed section having upwardly opening sectional square shape is integrally formed on a sheet, and a cap for sealing the base surface opening. CONSTITUTION:While a carrier sheet 22 is fed in a direction indicated by an arrow mark, the surface is coated by supplying a material 26 through a blade- like opening 26a of a cylindrical body 27 so that the film formation of the material 26 may be made on the sheet at a specified thickness, it is passed through a drying furnace 28 to dry a solvent through semi-drying, and a ceramic raw sheet 29 made of thick film is formed. When the material 26 is supplied to the sheet 22, if it is coated at a thickness enough to overally cover respective projecting sections 22b..., single-gapped recessed sections 29a... that are opened on the surface as corresponded to the sections 22b on the sheet 29 will be formed together with the sheet. Therefore, since the sheet 29 is cut at a predetermined dimension to form a base or a cap, the productivity can be improved and a flat package with high packaging property and without generating any deformation can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat package made of a ceramic material and a method for manufacturing the flat package.

[0002]

2. Description of the Related Art For example, there are flat packages (A) and (B) shown in FIG. 4 or 5 as a container for storing elements such as a crystal oscillator and a SAW filter. First, the flat package (A) shown in FIG. 4 comprises a base (1) and a cap (9), and the base (1) is a rectangular thick film sheet (3) made of a ceramic material or a ceramic / glass mixed material. Rectangular frame bodies (4) and (5) having the same outer shape and same sheet material as the thick film sheet (3) and having small and large openings are sequentially laminated and fixed,
A two-step concave portion (1b) for storing a rectangular cross section of a staircase wall surface having a step portion (1a) on the intermediate inner wall surface is provided. Then, an electrode lead-through through hole (6) penetrating vertically is formed in the step portion (1a), a conductive adhesive, for example, a silver paste (7) is filled therein, and vacuum suction is applied to reach the step surface. Derive. Therefore, the silver paste (7) on the step surface
The peripheral end of the element (8) such as the crystal unit is connected to the step (1
After being fixedly attached to a) and vibratably accommodated and held, the cap (9) is sealed on the upper surface of the frame body (5) through the sealant (10).

A flat package (B) shown in FIG.
Is a rectangular thick-film sheet (11) which comprises a base (2) and a cap (14) and is also made of a ceramic material or a mixed material of ceramic and glass, and has the same outer shape as the thick-film sheet (11). The frame body (12) is laminated and fixed, and a concave section (2a) for storing a rectangular cross section is provided. The holding plate (1) is planted on the bottom surface of the recess (2a).
After the element (8) is fixed by 3) and accommodated and held so as to be able to vibrate, the cap (14) is sealed to the upper surface of the frame (12) through the sealant (10).

The flat package (A) or (B)
When manufacturing, the doctor blade method is used as shown in FIG. That is, first, a long carrier tape (1) made of a plastic material is provided on the supply drum (15).
6) is wound up and fed out in the direction of the arrow, and is successively wound up on a winding drum (17), and above the intermediate position thereof, a slurry-like material (20) made of a ceramic material or a ceramic-glass mixed material. A cylindrical body (18) for storing the is placed, and a drying furnace (19) is continuously placed at a predetermined distance downstream thereof.

In the above structure, the carrier tape (1
6) are sequentially fed in the direction of the arrow, and the cylindrical body (1
The material (20) is supplied from the blade-shaped opening (18a) of 8) and is applied in the form of imprint, and the material (20) is deposited on the tape to a constant thickness. Then, the solvent is dried by passing through a drying oven (19) by semi-drying to form a thick film green ceramic sheet (21). Therefore, in the case of the flat package (B), first, as shown in FIG. 7A, the thick film sheets (11) and (11) are formed by cutting into a rectangular shape.
Next, the pair of thick film sheets (11) and (11) are combined into a set, and as shown in FIG. 7B, the central portion of one thick film sheet (11) is punched out to form a rectangular frame (12). ) Is formed, the frame body (12) is laminated on the other sheet (11) as shown in FIG. 7C. Then, the pair of stacked sheets (11) and (12) are fitted into a mold and hot pressed at 60 to 80 ° C. in a state where the outer shape thereof is regulated, and then 10
When fired at about 00 ° C, as shown in Fig. 7 (d),
A flat package (B) base (2) having a sheet thickness of about 0.2 to 1.0 mm is manufactured. The same applies to the cap (14).

In the case of the flat package (A), three thick film sheets (3), (3) and (3) formed by cutting the green sheet (21) into a rectangular shape, as in the case of FIG. 7A. ) As a set, and two thick film sheets (3) and (3) in each of them are punched out at their central portions with small and large dimensions to form rectangular frame bodies (4) and (5) having different small and large openings. Form. And FIG.
As shown in (e), they are the other thick film sheet (3)
After sequentially stacking in three layers on top of each other, for example, a pin for forming a through hole is pierced in the step portion (1a) of the frame body (4), and heat pressing and firing are repeated in the same manner to produce Form the base (1). Also, the cap (9)
Is also the same.

[0007]

The problem to be solved by the invention is that when a flat package base is formed, a rectangular thick film sheet cut from a raw sheet is punched out to form a rectangular frame body. As the number of man-hours increases and the number of man-hours increases, the ceramic material is expensive. Therefore, when the punched part is discarded, the material utilization rate (about 20 to 60%) is reduced, which leads to an increase in cost. Is easily deformed, and therefore, when the opening is deformed, the size and shape accuracy of the recess are reduced.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a flat package having one or more recesses of a rectangular cross-section having a transverse cross section that is expanded upward on the surface of a rectangular thick film sheet made of a ceramic material or a mixed material of ceramic and glass. A base integrally formed on the sheet, or a cap for sealing the base surface opening expanded downward,

As a manufacturing method thereof, a step of making a ceramic material or a mixed material of ceramic and glass into a slurry, and a carrier sheet having a plurality of one or multi-step convex portions of a predetermined shape projected on a surface at a constant array pitch The above slurry-like material is applied by the doctor blade method to form a thick film, and the thickness of the ceramic having one or multi-step concave portions formed by expanding upward on the carrier sheet corresponding to the convex portions. A step of forming a film sheet, and a step of drying the thick film sheet and thereafter cutting the thick film sheet into a rectangular frame shape for each of the recesses to form a package base or a cap having the recesses as a storage part. It is characterized by

[0010]

According to the above-mentioned technical means, a ceramic material or a slurry-like material composed of a ceramic and glass mixed material is applied thickly on a carrier sheet having a rectangular or multi-stage convex portion by a doctor blade method to form a film. Forming a ceramic thick film sheet having one or multi-stage recesses of a rectangular cross-section that is expanded upward. Next, the sheet is dried,
In addition, after cutting to a fixed size to form a package base or cap, the base opening is sealed with a cap via a sealant to form a flat package.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a flat package and a manufacturing method thereof according to the present invention will be described below with reference to FIGS. 1 (a) and 1 (b) are partial perspective views of carrier sheets (22) and (23) according to the present invention, wherein the carrier sheets (22) are plural on a long sheet (22a) made of a plastic material. The single-step convex portions (22b) ... Are integrally arranged at a constant alignment pitch, and the convex portions (22b) are formed by integrally molding or adhering the same material to the sheet (22a). Further, the carrier sheet (23) is formed by integrally arranging a plurality of two-step convex portions (23b) ... On a long sheet (23a) at a constant alignment pitch.
In the case of b), the sheet (23a) is integrally molded or attached separately and made of the same material.

Therefore, when manufacturing the flat package (B) having the one-step recessed portion shown in FIG. 5, first, as shown in FIG. 2, the doctor blade method is used, and first, a long carrier sheet is attached to the supply drum (24). (22) the convex part (22
B) is wound so as to face the front side, and is extended in the direction of the arrow with the convex portion (22b) placed on the upper surface. Then, the carrier sheet (22) is sequentially wound from the drum (24) onto the winding drum (25), and above the intermediate position thereof, a slurry-like material (26) made of a ceramic material or a ceramic-glass mixed material is provided. ) To store (2)
7) is arranged, and a drying furnace (28) is continuously arranged at a predetermined distance downstream thereof.

In the above structure, the carrier sheet (2
2) are sequentially fed in the direction of the arrow, and the cylindrical body (2
The material (26) is supplied from the blade-shaped opening (26a) of 6) and is applied in the form of imprint, and the material (26) is formed into a film with a constant thickness on the sheet. Then, the solvent is dried by passing through a drying oven (28) by semi-drying to form a thick ceramic raw sheet (29). At this time, when the material (26) is supplied onto the carrier sheet (22), the protrusions (22)
b) ... is applied to a thickness to cover the entire surface, and FIG.
As shown in, the convex portion (22b) on the green sheet (29) ...
The one-step recesses (29a) ... Therefore, as in the conventional case, FIG.
As shown in FIG. 5, the base (30) of the flat package (B) corresponding to the base (2) is formed by simply cutting each recess (29a) ... And
A cap (14) formed by integrally forming in the sheet a stepped concave portion having a rectangular cross-section that is formed by the same process and is expanded downward.
Is sealed in the opening of the base (30) to form a flat package (B).

Further, in the case of manufacturing the flat package (A) having the two-step recess shown in FIG. 4, the doctor blade method is used in the same manner as described above, and the carrier sheet (22) is replaced with the one shown in FIG. A long carrier sheet (23) having a step convex portion (23b) is used.

In the above structure, a thick ceramic green sheet is formed as in the above. At this time, when the material (26) is supplied onto the carrier sheet (23), each convex portion (23
When b) is applied to a thickness to cover the entire surface, a two-step concave portion that expands upward corresponding to the convex portions (23b) is formed on the green sheet together with the sheet. Therefore, as in the conventional case, FIG.
As shown in (c), the base (32) of the flat package (A) corresponding to the base (1) is formed by simply cutting each recess (31) ... Then, the flat cap (9) formed in a separate step is sealed in the opening of the base (32) as in the conventional case to form the flat package (A).

Incidentally, when forming the base (32), as shown in FIG.
As shown in FIG. 3D, a rectangular frame body (3) having a large opening is formed on the base (30) of the flat package (B) shown in FIG. 3B.
3) may be formed by laminating by hot pressing. In this case, the concave portion of the base (30) which requires dimensional accuracy is formed integrally with the sheet with high dimensional accuracy,
Since the opening size of the frame body (33) may be coarse, there is no problem even if the frame body (33) is deformed during hot pressing.

[0017]

According to the present invention, a slurry material composed of a ceramic material or a mixed material of ceramic and glass is applied by a doctor blade method onto a carrier sheet having convex portions to form a thick film, and the convex portions are dealt with. After forming a thick film ceramic raw sheet with concave portions, the raw sheet was cut to a fixed size to form a flat package base or cap, so the concave portion punching process is not required and the man-hours are reduced. In addition, since there is no punched part, waste material is eliminated and cost can be reduced. In addition, since the laminated portion is eliminated, the sealing property is good, and the deformation of the concave portion due to hot pressing does not occur,
Improves reliability.

[Brief description of drawings]

FIG. 1A is a partial perspective view of a carrier sheet showing an embodiment of a method for manufacturing a flat package according to the present invention. (B) is a partial perspective view of a carrier sheet showing another embodiment of the method for manufacturing a flat package according to the present invention.

FIG. 2 is a schematic side view of a doctor blade method showing an embodiment of a flat package manufacturing method according to the present invention.

FIG. 3A is a partial perspective view showing an embodiment of a thick film green ceramic sheet according to the present invention. (B) is FIG.
It is a perspective view which shows the Example of the flat package base formed from the thick film sheet | seat shown to (a). (C) is FIG.
It is a perspective view which shows the other Example of the flat package base formed from the thick film sheet | seat shown to (a). FIG. 3D is a perspective view showing another embodiment of the flat package base formed from the thick film sheet shown in FIG.

FIG. 4 is a schematic side sectional view showing an example of a conventional flat package.

FIG. 5 is a schematic side sectional view showing another example of a conventional flat package.

FIG. 6 is a schematic side view of a doctor blade method showing an example of a conventional flat package manufacturing method.

7 (a), (b), (c), (d) e) are perspective views showing steps of forming a flat package base from a thick ceramic green sheet formed by the doctor blade method shown in FIG. .

[Explanation of symbols]

 30, 32 Base 9, 14 Cap 22, 23 Carrier sheet 22b, 23b Convex portion

Claims (3)

[Claims] 1. A base comprising a square thick film sheet made of a ceramic material or a mixed material of ceramic and glass, on the surface of which a single or multi-stage concave portion having a transverse cross-section rectangular shape which is expanded upward is integrally formed on the sheet. A flat package comprising a cap for sealing a surface opening. 2. A base formed by integrally forming one or multi-stage recesses of a rectangular cross-section which is expanded upward on the surface of a rectangular thick film sheet made of a ceramic material or a mixed material of ceramic and glass, and a base. A flat package, comprising: a cap formed integrally with a sheet to form a single or multi-stage concave portion having a lateral cross-sectional square shape that seals a surface opening. 3. A step of making a ceramic material or a mixed material of ceramic and glass into a slurry form, and the slurry form on a carrier sheet in which a plurality of one or multi-step convex portions having a predetermined shape are projected on a surface at a constant array pitch. A material is applied by a doctor blade method to form a thick film, and a thick film sheet of ceramic having one or multi-stage concave portions formed by expanding upward corresponding to the convex portions is formed on a carrier sheet. A flat package characterized by including a step and a step of drying the thick film sheet and then cutting the thick film sheet into a rectangular frame shape for each of the recesses to form a package base or a cap having the recesses. Production method.