JP3692126B2 - Cone-shaped connection terminal and assembly method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, since the electronic component, particularly the semiconductor package, corresponds to high-density mounting, spherical connection terminals that can be reduced in size and thickness are employed. corn) Contact and about the installation method cone-shaped connecting pin has a shape.
[0002]
[Prior art]
The development process of the conventional technology will be briefly described. Multi-functionality of semiconductor integrated circuit (IC), along with the high performance, package for mounting the IC is to change due to a variety of needs, it has evolved. Initially, the IC leads (legs) were straightened downward from both sides like the centipede legs and were inserted into the openings on the printed circuit board and fixed by soldering. There were restrictions on the number of devices, and it was not possible to cope with miniaturization, thinning, and space saving.
[0003]
Next came the pin type, which takes out pins from the entire back surface. In other words, PGA (Pin Grid Array) has been improved by increasing the number of pins, and many pins on the back side are made like a sword mountain of a flower arrangement tool. Although it responded to the increase in the number of terminals for various signals, there was a difficulty in reducing the thickness.
So appeared in the is the BGA corresponding to the die forte thinner pin in the ball (Ball Grid Array). By replacing the ball with a pin, it can be made extremely thin, contributing to space saving.
Furthermore, an IC chip size package (hereinafter referred to as an electronic component) , that is, a CSP (Chip Size Package) is a further reduction in size by eliminating the plastic that covers and seals the IC. The mounted IC chip itself has a chip size, and a smaller ball (for example, a diameter of 0.3 to 0.5 mm) is adopted as a spherical connection terminal on the back surface.
[0004]
Thus, on the back surface of the electronic component, the spherical connection terminal on behalf of the pins (hereinafter, referred to as balls) are arranged in a grid pattern, the pitch interval of the BGA has a narrow pitch to 0.5mm from 0.8mm It is advanced and the density of balls is increasing. Also, electronic components tend to be lighter, thinner, and smaller because of increased mounting density and electrical transmission characteristics. Of course, the contact that is the counterpart of the ball is also required to support higher density. .
[0005]
Therefore, the present applicant has disclosed a spiral contactor (spiral contactor) for spherical connection terminals corresponding to higher density (for example, see Patent Document 1).
10A is a plan view showing a spiral contactor 20 in which a plurality of spiral contactors 21 are arranged, and FIG. 10B is an enlarged plan view of the spiral contactor 21 in which the portion A of the spiral contactor 20 is enlarged. FIG. 10C is a cross-sectional view thereof. As shown in FIG. 10B, the spiral contact 21 has a spiral shape in plan view, and when contacting the ball, the contact spreads outward from the center of the spiral contact 21, and the spiral portion is The wire is deformed while being bent so as to be wound around the ball, thereby making an electrical connection. The spiral part of the spiral contact 21 has a feature that the thickness is constant and the width becomes narrower as it approaches the tip from the root.
[0006]
The present applicant has the alternative to BGA balls, proposes a cone-like connecting terminal grid array to enable thinner density (CGA) (e.g., see Patent Document 2). FIG. 11 is a diagram for explaining the difference in thickness between the ball 17 and the cone 1. FIG. 11A shows a state in which the electronic component having the ball 17 and the electronic component having the spiral contact 21 are inserted. sectional view in a cross-sectional view at (b) the state in which inserted an electronic component having a cone 1, an electronic component having a spiral contactor 21. As shown in FIGS. 11 (a) and 11 (b), when the amount of bending by both connecting terminals is the same (H3 = h3), the thickness dimension of the electronic component employing the cone 1 is H4> h4, and the ball It can be seen that the thickness can be reduced by 17 radii.
[0007]
[Patent Document 1]
JP 2002-175859 (FIGS. 1 and 2)
[Patent Document 2]
JP 2003-78078 A (FIGS. 1, 2, 3, and 4)
[0008]
However, when assembling the cone connection terminal on an electronic component, the fixed part of the shape of a cone-shaped connection terminal, the assembling process of a cone-shaped connection terminal has not been disclosed.
[0009]
[Problems to be solved by the invention]
Then, this invention makes it a subject to provide about the cone- shaped connection terminal which is easy to assemble | attach to an electronic component, and its assembling method.
[0010]
[Means for Solving the Problems]
As a means for solving the above problems, a cone-shaped connecting terminal according to claim 1 is provided in the electronic component, a cone-shaped connecting terminal having a connection terminal for electrically connecting the electronic component A cone-shaped head that becomes the cone- shaped connection terminal and a fixing portion that fixes the cone-shaped head to the electronic component, the cone-shaped head forming a cone, and the fixing portion is spherical characterized in that it is formed in.
[0011]
According to the first aspect of the present invention, since the cone-shaped head of the cone- shaped connection terminal is formed in a cone, the cone-shaped head can be made smaller than the ball of the spherical connection terminal, so that the thickness of the electronic component can be reduced. Moreover, since the fixing portion can be shortened by making the fixing portion spherical (ball), a cone-shaped connection terminal that can be assembled to a thinned electronic component can be provided .
[0012]
The invention described in claim 2 is an assembling method for assembling the cone- shaped connection terminal according to claim 1 to an electronic component,
(1) to the electronic component drilled through holes, and the upper surface Tobakuchi, and the inner circumferential surface, a first step of applying a metal plating to a lower surface Tobakuchi, (2) the cone of the cone-shaped connecting terminal The top of the cone is inserted into the through hole of the electronic component from the tip of the fixing part, and the lower surface of the cone-shaped head of the cone- shaped connection terminal is brought into contact with the upper surface and the mouth of the metal plating. And a second step.
[0013]
According to the second aspect of the present invention, a cone is formed on the cone-shaped head portion of the cone- shaped connection terminal , and a bulge is formed on the fixed portion, and an urging force is generated in the fixed portion due to the elasticity of the material itself. In the first step, through-holes are drilled in the electronic parts into which the fixed portions of the cone- shaped connection terminals are inserted, and the main parts are made of metal by increasing the elasticity of the material itself. In the second step, since the assembling work is completed simply by inserting the tip of the fixing portion of the cone- shaped connection terminal into the through hole and mounting it, the assembly can be performed easily and easily.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
<First embodiment>
FIG. 1 is a three-side view of a cone- shaped connection terminal 10 according to the first embodiment, where (a) is a front view, (b) is a right side view, and (c) is a bottom view.
As shown in FIG. 1A, the cone- shaped connection terminal 10 includes a cone-shaped head 1 and a fixed portion 2.
The cone- shaped head 1 forms a cone, and R (R) is applied to the top 1a. Regarding the size, the diameter of the cone- shaped head 1 is here 0.3 mm. The apex angle of the cone- shaped head 1 is, for example , 90 °, and R of the apex 1a is R 0.03 mm, but other dimensions, for example , the diameter of the cone- shaped head 1 is φ0. It may be 1 to 0.2 mm, and the angle and R may also be changed.
Further, the fixing portion 2 is fitted into the through-hole 5 (see FIG. 6) by close-fitting using the elasticity of the bulge 2b and the material itself and the elasticity of the electronic component itself, and is electrically connected. Although connected, you may make it bite into the metal plating 6 of the inner surface 5b of the through hole 5 mentioned later.
The distal end 3 of the fixing portion 2 is formed smaller than a hole diameter φd (see FIG. 6) of a through hole 5 provided later on an electronic component, for example , an insulating substrate.
[0015]
As shown in FIG. 1B, the cone- shaped connection terminal 10 has a cone-shaped head 1 having the same cone shape in a side view, but the fixed portion 2 is different and has a rectangular shape. As shown in FIG. 1 (c), the fixing portion 2 has a ridgeline, the fixing portion 2 is rectangular or square when viewed from below, and corners 2c, 2c,... Are formed at four corners thereof.
The end surface of the tip 3 is a rectangle, and the tip surface 3a is flat. The material of the cone- shaped connection terminal 10 may be the same solder as a ball grid array (BGA) ball, or may be a combination of nickel, copper, and other metals having good conductivity.
[0016]
FIGS. 2A and 2B are three views showing a modification of the cone- shaped connection terminal 10 according to the first embodiment, wherein FIG. 2A is a front view, FIG. 2B is a right side view, and FIG. 2C is a bottom view. .
The difference between the cone- shaped connection terminal 10 shown in FIG. 1 and the cone- shaped connection terminal 10 ′ shown in FIG. 2 is the difference in shape between the cone-shaped head 1 and the cone-shaped head 1 ′. That is, as shown in FIG. 2C, the cone-shaped head 1 'has the same cone shape, but the top portion of the cone in the vertical direction is deleted. By doing in this way, since it can manufacture with a board | plate material, there is no waste in material picking and it is convenient. Further, even if the cone-shaped head 1 ′ is cut out in this way, there is no problem in contact with the spiral contact 21 (see FIG. 9B).
[0017]
<Second Embodiment>
FIG. 3 is a three-side view of the cone- shaped connection terminal 11 according to the second embodiment, in which (a) is a front view, (b) is a right side view, and (c) is a bottom view.
The difference between the cone- shaped connection terminal 10 and the cone- shaped connection terminal 11 is that an opening 2 a is provided in front of the fixed portion 22. As shown in FIG. 3 (a), the substantially O-shaped opening 2a is provided at the center of the fixed portion 22, and has bulges 2b and 2b to the left and right so as to generate a biasing force. As shown in FIG. 3C, the fixing portion 22 has a rectangular shape. When the fixing portion 22 is inserted into a hole diameter φd of a through hole 5 (see FIG. 6A) described later, the width direction is compressed. Deform.
[0018]
FIGS. 4A and 4B are three views showing a modification of the cone- shaped connection terminal 11 according to the second embodiment, where FIG. 4A is a front view, FIG. 4B is a right side view, and FIG. 4C is a bottom view. .
A cone-shaped connection terminal 11 shown in FIG. 3 described above, the difference between the cone-shaped connecting terminal 11 'shown in FIG. 4 is a difference in the shape of a cone-shaped head 1 and the cone-shaped head 1'. That is, as shown in FIG. 4C, the cone-shaped head 1 'has the same cone shape, but the top portion of the cone in the vertical direction is deleted. By doing in this way, since it can manufacture with a board | plate material, there is no waste in material picking and it is convenient. Similarly to the above, even if the cone-shaped head 1 ′ is cut out in this way, there is no problem in contact with the spiral contact 21 (see FIG. 9B).
[0019]
<Third Embodiment>
5A and 5B show the cone- shaped connection terminals 12 and 13 according to the third embodiment, in which FIG. 5A is a front view showing the cone- shaped connection terminal 12 in which the fixing portion 32 is spherical, and FIG. It is a front view which shows the cone- shaped connection terminal 13 made into the elliptical sphere.
As shown in FIG. 5A, the thickness of the electronic component can be reduced by making the fixing portion 32 of the cone- shaped connection terminal 12 into a spherical shape (ball) as the shortest shape.
Moreover, as shown in FIG.5 (b), the fixing | fixed part 42 of the cone- shaped connection terminal 13 is good also as an elliptical sphere like a rugby ball, or an egg type. It is easier to assemble than the spherical shape (ball) because the tip is sharp.
Further, the fixing to the electronic component can be performed by adding an interference with a spherical diameter and an interference fit with respect to the hole diameter of the through hole.
[0020]
Next, a method for assembling the cone- shaped connection terminal 11 will be described with reference to FIGS.
Figure 6 is an explanatory view showing the assembling process of a cone-shaped connection terminal 11, FIGS. 6 (a) is a sectional view showing a process of inserting the fixed portion of the cone-shaped connecting terminals 11, Fig. 6 (b) fixing portion FIG. 6C is a bottom view after the insertion shown in FIG. 6B.
In the first step, a through hole 5 is formed in an insulating substrate 4, which is an electronic component, for example, and copper plating 6 is provided on the upper surface and the opening 5a, the inner peripheral surface 5b of the through hole 5, and the lower surface and the opening 5c. Apply.
In the second step, the cone-shaped heads 1 of the cone- shaped connection terminals 11 aligned by a parts feeder (not shown) are held by a holding member 18 by suction, inserted into the through hole 5 of the insulating substrate 4 from the tip 3, For example, the bottom surface 1b of the cone-shaped head 1 of the cone- shaped connection terminal 11 is pushed into the copper plating 6 of the mouth 5a.
[0021]
As a result, as shown in FIG. 6 (b), the substantially O-shaped opening 2a and the bulges 2b and 2b of the fixing portion 22 are forcibly deformed, and as shown in FIG. Transforms into When pushed into the through hole 5, an urging force is generated, so that the corners 2 c, 2 c... Of the fixing portion 22 of the cone- shaped connection terminal 11 bite into the metal plating 6 of the through hole 5 and are fixed.
Also, by the cone-shaped head 1 cone shaped connection terminal 11, since the thickness smaller than the ball of the spherical connection terminal, can reduce the thickness of the electronic component.
In addition, the method of holding the cone-shaped head 1 by the holding member 18 may be magnetic attachment by magnetic force or other methods in addition to adsorption. A plurality may be held simultaneously. Moreover , the cone- shaped connection terminal used is not limited to the cone- shaped connection terminal 11, and may be the cone- shaped connection terminals 10, 10 ′, 11 ′, 12, and 13.
[0022]
FIG. 7A is a plan view showing a cone grid array in which a cone- shaped connection terminal is assembled to an electronic component, and FIG. 7B is a front view thereof. In this manner, the cone- shaped connection terminals are assembled in orderly arranged in through holes provided in a lattice shape.
[0023]
Next, a method for disassembling the cone- shaped connection terminal 11 will be described.
Figure 8 is an explanatory view showing a method for decomposing a cone-like connecting terminal 11, (a) is a sectional view showing an insertion process of inserting a core pin tool 19 into the through holes 5, (b) corn-like connecting FIG. 6 is a cross-sectional view showing a process of detaching the terminal 11.
As shown in FIGS. 8A and 8B, the extraction pin tool 19 is inserted into the through hole 5 on the back surface of the insulating substrate 4 , which is an electronic component, and the tip surface of the tip 3 of the cone- shaped connection terminal 11. Even if the cone- shaped connection terminal 11 with the corners 2c, 2c... Of the fixing portion 22 biting into the hole of the through hole 5 can be removed simply by abutting and pushing into 3a, the replacement of the cone- shaped connection terminal 11 is possible. Besides, it can be easily added or deleted, and can cope with design changes and specification changes. In addition, it is easy to separate and collect after disposal, and it can cope with environmental conservation.
In addition to the punch pin tool 19, a high-pressure fluid, for example , high-pressure air, may be directly injected into the hole of the through hole 5 to push out the cone- shaped connection terminal 11 by air pressure.
[0024]
FIG. 9 is an explanatory view for explaining the operation of the spiral contact 21 by the cone- shaped connection terminal 11, and (a) is a cross-sectional view showing a state before contact with the spiral contact 21, ) Is a cross-sectional view showing a state after contact with the spiral contact 21. As shown in FIG. 9 (b), when the spiral contact 21 comes into contact with the cone-shaped head 1, the contact spreads outward from the center of the spiral contact 21, and the spiral portion is wound around the cone-shaped head 1. Deforms while touching and deforms to make line contact.
Thus, by using the cone-shaped head 1 as the connection terminal, the amount of bending of the spiral contactor 21 is greatly different from that of the ball, and the amount of bending near the base and the amount of bending of the tip are almost equal. Therefore, the bending stress in the vicinity of the base can be reduced, and the effect of reducing the influence on the repeated load can be obtained.
Further, in the comparison with the ball shown in FIG. 11, in the case of the cone-shaped head 1, as shown in FIG. 9 (b), since it can be brought into deep contact with the root, the reliability of electrical connection is high, There is little damage.
The cone refers to a cone-shaped connection terminal (including a fixed portion) that replaces the ball of the spherical connection terminal, and the cone grid array refers to an electronic component in which cones are arranged in a grid, and CGA (Cone Grid). Array).
[0025]
The present invention can be modified and changed in various ways within the scope of the technical idea. For example, the shape of the fixed portion is not limited to a plate shape, and may be a tapered cylindrical body. Further, as shown in FIG. 5, the shape is not limited to a spherical shape, and may be a pin shape or a shape such as a hose joint tapered and provided with a plurality of V grooves for retaining. The shape of each cone is not limited to a cone, but may be a polygonal pyramid such as a triangular pyramid or a quadrangular pyramid.
[0026]
【The invention's effect】
According to the first aspect of the present invention, since the cone-shaped head portion of the cone- shaped connection terminal is formed into a cone, the cone- shaped connection terminal can be made smaller than the ball of the spherical connection terminal, so that the thickness of the electronic component can be reduced. Moreover, since the fixing portion can be shortened by making the fixing portion spherical (ball), it is possible to provide a cone-shaped connection terminal that can be suitably assembled to a thinned electronic component .
[0027]
According to the second aspect of the present invention, a cone is formed on the cone-shaped head portion of the cone- shaped connection terminal , and a bulge is formed on the fixed portion, and an urging force is generated in the fixed portion due to the elasticity of the material itself. By forming a bulge and increasing the elastic force of the material itself, in the first step, a through hole is drilled in the electronic component into which the cone- shaped connection terminal is inserted, and the main part is metal plated, In the second step, the assembly work is completed simply by inserting and attaching the tip of the fixed portion of the cone- shaped connection terminal into the through hole, so that the assembly can be performed easily and easily.
[Brief description of the drawings]
FIG. 1 is a three-side view of a cone- shaped connection terminal according to a first embodiment of the present invention, where (a) is a front view, (b) is a right side view, and (c) is a bottom view.
FIGS. 2A and 2B are three side views showing a modification of the cone- shaped connection terminal according to the first embodiment, wherein FIG. 2A is a front view, FIG. 2B is a right side view, and FIG.
3A and 3B are three views of a cone- shaped connection terminal according to a second embodiment of the present invention, in which FIG. 3A is a front view, FIG. 3B is a right side view, and FIG.
FIGS. 4A and 4B are three side views showing a modification of the cone- shaped connection terminal according to the second embodiment, wherein FIG. 4A is a front view, FIG. 4B is a right side view, and FIG.
5A and 5B are a cone- shaped connection terminal according to a third embodiment of the present invention, in which FIG. 5A is a front view showing a cone- shaped connection terminal having a fixed portion made spherical, and FIG. It is a front view which shows the cone- shaped connection terminal .
[Figure 6] is an explanatory view showing a method of assembling the conical connection terminal, (a) shows the cross-sectional view showing a process of inserting the fixed portion of the cone-shaped connection terminal, (b) is after insertion of the cone-like connecting terminal Sectional drawing of the AA line shown to (c), (c) is a bottom view after the insertion shown to FIG. (B).
7A is a plan view showing a cone grid array in which a cone- shaped connection terminal is assembled to an electronic component, and FIG. 7B is a front view thereof.
8 is an explanatory view showing a method for decomposing a cone-shaped connection terminal, the (a) is a sectional view showing an insertion process of inserting a core pin tool into the through holes, (b) is a leaving process of the cone-shaped connecting terminal It is sectional drawing shown.
9A and 9B are explanatory diagrams for explaining the operation of the spiral contact by the cone- shaped connection terminal , wherein FIG. 9A is a sectional view showing a state before contact with the spiral contact, and FIG. 9B is a spiral contact. It is sectional drawing which shows the state after contact with.
10A is a plan view showing a spiral contactor in which a plurality of conventional spiral contacts are arranged, FIG. 10B is an enlarged plan view of the spiral contactor in which the A portion of the spiral contactor is enlarged, and FIG. FIG.
FIG. 11 is an explanatory diagram for explaining a difference in thickness between a ball and a cone- shaped connection terminal . FIG. 11A shows an electronic component having a ball and an electronic component having a spiral contact. Sectional drawing in the state where it inserted, (b) is a sectional view in the state where the electronic component which has a cone- shaped connection terminal, and the electronic component which provided the spiral contactor were inserted.
[Explanation of symbols]
1, 1 ' Cone-shaped head 1a Top 1b Lower surface 2, 22, 32, 42 Fixed portion 2a Opening 2b Swelling 2c Corner 3 Tip 3a Tip surface 4 Insulating substrate 5 Through-hole 5a Upper surface and edge 5b Inner peripheral surface 5c Spout 6 Metal (copper) plating 10, 10 ', 11, 11', 12, 13 Cone- shaped connection terminal 18 Holding member 19 Extraction pin tool 20 Spiral contactor 21 Spiral contact

Claims (2)

A cone-shaped connection terminal provided in an electronic component and having a connection terminal for electrical connection of the electronic component,
Consists of a cone- shaped head that becomes the cone- shaped connection terminal, and a fixing portion that fixes the cone-shaped head to the electronic component,
The cone-shaped connection terminal, wherein the cone-shaped head forms a cone, and the fixing portion is formed in a spherical shape . An assembly method for assembling the cone- shaped connection terminal according to claim 1 to an electronic component,
(1) A first step of drilling a through hole in an electronic component, and performing metal plating on the upper surface, the flange, the inner peripheral surface, and the lower surface, the flange,
(2) holding the cone-shaped head of the cone-shaped connection terminal, the insert from the distal end of the fixing portion in a through hole of an electronic component, the upper surface Tobakuchi metal plated, the cone-shaped connection terminal A second step of contacting the lower surface of the cone-shaped head of
A method for assembling a cone- shaped connection terminal , comprising:

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