JPH0628938A - Ceramic container for enclosing electronic part and manufacture thereof - Google Patents

Abstract

PURPOSE:To make a tube and a drum part of the molding material fit for the function thereof, and prevent the rolling by inserting a ceramic tube, which is burned and ground for polishing, into the center of a drum part made of synthetic resin and having a polygonal cross section for integral forming. CONSTITUTION:A kneaded raw material is extruded for molding by an extruder, and dried, and heated for burning, and thereafter, it is ground by a centerless grinder to finish it into a ceramic tube 1 having, for example, a diameter of 2.5mm and a center hole diameter of 1.3mm and a length of 2.6mm. Next, the synthetic resin having a relatively high heat resistance is extruded by an extruder to mold a drum part 2, which has a square cross section of about 2.7mm and a length of about 2.6mm, integrally with the tube 1 so that the tube 1 is inserted to the center of the drum part 2 for passing through the drum part 2. The tube 1 and the drum 2 are thereby made of the material fit for the function thereof, for example, the tube 1, which maintains the accuracy severely, is made of ceramic and the drum part 2 for preventing the rolling of the tube 1 is made of the synthetic resin, which can be molded easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a ceramic container for enclosing an electronic component and a method for manufacturing the same. Since it is formed, it rolls easily, and in the configuration in which an electronic component such as a semiconductor is inserted into the ceramic tube, the lead wire is projected to the outside, and the circuit is formed by mounting it on a printed circuit board or the like, the rolling is easy. The poor stability due to (1) is improved by industrial means.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, a conventional ceramic container for enclosing an electronic component is a fired circular ceramic tube a having an outer diameter of 2 mm to 4 mm and a length of 5 mm to 8 mm.
In the central portion of the outer periphery of the same, a homogeneous circular firing body portion b having a thickness of about 1 mm to 2 mm is integrally formed in a cover shape. However, with such a structure, firing distortion cannot be avoided, so after firing, the ceramic tube is finished by rotating and grinding the ceramic tube with a hard blade, a centerless grinder, etc. It is inevitable. For this reason, it is difficult to roll the mounting technology by soldering electronic components such as semiconductors to a printed circuit board or the like.

[0003]

Since the above-mentioned rolling deteriorates the workability of the ceramic container as described above, the synthetic resin molding for preventing the rolling by making only the body part polygonal and the addition of the ceramic powder. Pressure molding etc. can be considered, but synthetic resin molding has problems in moisture resistance, heat resistance, etc., and ceramic powder molding is to maintain the accuracy of the ceramic tube part protruding from the body part on both sides as designed. Grinding and polishing are indispensable, but the polygonal body part is not circular as before, so there remains a drawback that rotary grinding and polishing of the tube part becomes impossible. The present invention has been made in view of the fact that the body portion is prevented from rolling and the tube portion is not ground and polished after insert molding.

[0004]

According to a first aspect of the present invention, a ceramic tube which has been fired and ground and polished is inserted into the center of a synthetic resin body portion which has a polygonal cross section to prevent rolling and is integrally formed. The present invention relates to a ceramic container for enclosing an electronic component. According to a second aspect of the present invention, a ceramic tube that is fired and ground and polished is inserted into the center of a synthetic resin body portion that has a polygonal cross section to prevent rolling, and is integrally molded. The present invention relates to a method for manufacturing a container.

[0005]

According to the present invention, unlike the prior art, the whole tube is not fired and molded by grinding and polishing, but only the tube to be ground and polished after firing is molded from ceramic, and the fired and ground ceramic tube is used as an insert material. The body part that is prepared and prevents rolling is the same shape as the conventional one, with insert molding by casting the above insert material with synthetic resin that is easy to form a polygon and does not require grinding and polishing after insert molding. The difference in the function that does not interfere as a container is realized by the configuration in which the materials of the tube and the body are different.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The attached drawings show an embodiment of the present invention. FIG. 1 is a partially cutaway side view of the insert material of claim 1, FIG. 2 is a vertical sectional front view of a synthetic resin body, and FIG. It is a side view of a container.

FIG. 1 shows a ceramic tube 1 in which a kneaded raw material is extruded and molded by an extruder in a known manner.
After drying, it is heated and baked, and after baking it is ground by a centerless grinder to have a diameter of 2.5 mm. Inner diameter of center hole 1.3m
m. Finish the insert material with a length of 2.6 mm. Figure 2
Indicates a body portion 2 extruded from a synthetic resin material having a relatively high heat-resistant temperature by an extrusion molding machine, and is formed into a square section of about 2.7 mm and a length of about 2.6 mm, and the ceramic tube of FIG. The container of FIG. 3 is constructed by integrally molding by inserting 1 into a penetrating shape.

[0008]

According to the first aspect of the present invention, the ceramic tube 1 which has been fired and ground is inserted into the center of the synthetic resin body portion 2 which has a polygonal cross section to prevent rolling and is integrally molded. The tube made of insert material, which must be capped or soldered on a printed circuit board or the like and whose precision must be strictly maintained, is fired with ceramics, and then manufactured by grinding and polishing. Since the body part that is formed into a rectangular shape and prevents unintentional rolling is formed from a synthetic resin that is easy to form and does not easily change over time, the ground and polished ceramic tube that is the insert material is inserted and integrally formed. There is an effect that the tube and the body can be made into a molding material corresponding to each function and integrated. The invention of claim 2 relates to an invention of a method for producing the product of claim 1,
The invention of claim 1 is a specific invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 of the accompanying drawings show an embodiment of the present invention, and FIGS.
Shows a ceramic container for enclosing a conventional electronic component.

1 is a partially cutaway side view of the insert material according to claim 1;

FIG. 2 is a vertical sectional front view of a synthetic resin body portion.

FIG. 3 is a side view of the container according to the first aspect of the invention.

FIG. 4 is a side view of a conventional ceramic container that encloses electronic components.

FIG. 5 is a front view of the same.

[Explanation of symbols]

1 Ceramic tube, 2 Body part of synthetic resin material extruded by extruder

Claims (2)

[Claims] 1. A ceramic encapsulating an electronic component, characterized in that a ceramic tube which is fired and ground and polished is inserted into the center of a synthetic resin body portion having a polygonal cross section to prevent rolling and integrally molded. container. 2. A ceramic encapsulating an electronic component, characterized in that a fired and ground and polished ceramic tube is inserted into the center of a synthetic resin body portion having a polygonal cross section to prevent rolling and integrally molded. Container manufacturing method.