JP3265770B2 - Method for manufacturing surface mount components - 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 surface mount component used for, for example, a directional coupler.

[0002]

2. Description of the Related Art Conventional surface mount components include, for example,
The directional coupler is shown in FIGS. In FIG. 5, 1
Is a substrate made of a dielectric material,
1st stripline 2 bent at right angle in one place
Are formed, and a lead electrode 3a and an input electrode 4 are formed from one end of the first strip line 2 to a nearest corner of the first side surface 1a of the substrate 1, and a lead is drawn from the other end to a diagonal of the input electrode 4. The electrode 3b and the first output electrode 5 are formed.

A second strip line 6 is formed at a predetermined interval from the first strip line 2, and one end of the strip line 6 is connected to a second side 1b of the substrate 1 facing the input electrode 4. The extraction electrode 7a and the second output electrode 8 are formed at the corner of the above, and the extraction electrode 7b and the isolation electrode 9 are formed from the other end to the end of the substrate 1 between the output electrode 5 and the output electrode 8.

[0006] As shown in FIG. 6, a ground electrode 10 having a notch 10 a at a position facing the input electrode 4, output electrodes 5, 8 and the isolation electrode 9 on the front surface is provided on the back surface of the substrate 1. Is formed. Further, end electrodes 11a, 11b, 11c, 1 that are electrically connected to the input electrodes 4, the output electrodes 5, 8, and the isolation electrodes 9 are provided on the side surfaces of the substrate 1.
1d and end electrodes 11e, 11 which are electrically connected to the ground electrode 10.
f to form a directional coupler 12. The input electrodes 4, output electrodes 5, 8 and isolation electrode 9 function as connection electrodes for connecting the strip lines 2, 6 to the end face electrodes 11a to 11d.

[0005] Next, a method of manufacturing the directional coupler 12 configured as described above will be described. First, as shown in FIG. 7, strip lines 2, 6, lead electrodes 3a, 3b, 7a, 7b, input electrodes 4, output electrodes 5, 8, and isolation electrodes 9 are formed on the surface of a mother substrate 13 made of a dielectric material. Are formed in a matrix. Also, as shown in FIG.
On the rear surface of the mother substrate 13, a ground electrode 10 having a notch 10a at a position facing the input electrode 4, output electrode 5, 8 and isolation electrode 9 on the front surface is formed. After the mother substrate 13 is cut along the dividing lines 14a and 14b and divided into a plurality of small substrates 15, end electrodes 11a to 11b are formed on the divided surface of the small substrate 15, and the directional coupler 12 is obtained. Can be

The strip lines 2, 6 on the surface of the mother substrate 13 and the extraction electrodes 3a, 3b, 7a, 7b,
Input electrode 4, output electrode 5, 8, isolation electrode 9
In addition, the ground electrode 10 on the back surface is formed by forming a thin film on the entire surface, printing a resist by a pattern, and then forming the thin film by photoetching.

[0007]

However, in the above-mentioned conventional method of manufacturing a surface mount component, the mother board 13 is not provided.
Strip lines 2, 6 on the surface of
When the 3b, 7a, 7b, the input electrode 4, the output electrode 5, 8 and the isolation electrode 9 are formed so as to be shifted in the direction A of FIG. 7 due to the positional shift of the pattern, as shown in FIG. On the substrate 15, the output electrode 5, the isolation electrode 9, and the end face electrodes 11 b and 11 d are opened, and the output electrode 8 of the lowermost small substrate 15 is opened.
And the end surface electrode 11c is in an open state, while the input electrode 4 and the end surface electrode 11a of the uppermost small substrate 15 are in an open state as shown in FIG.

When the ground electrode 10 on the back surface is formed so as to be displaced in the direction A in FIG. 8 due to the displacement of the pattern, as shown in FIG. When the end electrodes 11b and 11d that are electrically connected to the isolation electrode 9 are short-circuited with the ground electrode 10, and formed to be shifted in the B direction,
In all the small substrates 15, as shown in FIG. 12, the ground electrode 10 and the end electrodes 11e and 11f are in an open state. Further, when the ground electrode 11 is formed to be shifted in the C direction, as shown in FIG. 13, in the small substrates 15 other than the rightmost column, the end face electrode 11a conducting to the input electrode 4 is short-circuited with the ground electrode 10. Becomes

When the mother substrate 13 is divided into the small substrates 15 and cut off from the dividing lines 14a, 14b, the input electrodes 4, the output electrodes 5, 8 In addition, the conduction and insulation between the isolation electrode 9 and the ground electrode 10 and the end face electrodes 11a to 11f may be inferior, failing to function as a directional coupler, and lowering the product yield.

The present invention has been made in order to solve such a problem, and a surface capable of maintaining conduction between an end face electrode and a connection electrode or a ground electrode even if a pattern shift or a cutting shift occurs. It is an object of the present invention to provide a method for manufacturing a mounted component.

[0011]

In order to achieve the above object, according to the present invention, a main electrode and connection electrodes extending from the main electrode are formed in a matrix on the surface of a mother substrate made of a dielectric material. A ground electrode provided with a notch facing the connection electrode on the back surface is formed, the mother substrate is divided into a plurality of small substrates along a division line, and the connection electrode or the divided surface of the divided small substrate is divided. In a method for manufacturing a surface mount component having an end face electrode which is electrically connected to a ground electrode, the notch of the connection electrode and the ground electrode is formed so as to extend over the dividing line.

[0012]

According to the above construction, the notch for insulating the connection electrode conducting to the end face electrode and the insulation for the end face electrode and the ground electrode are formed on the front and back surfaces of the mother board over the dividing line for dividing the board into small substrates. Even if a pattern shift occurs during electrode formation or a cutting shift occurs when the substrate is divided into small substrates, the connection electrode and the ground electrode are located at positions on the front and back surfaces of the small substrate that are electrically connected to the end surface electrodes. And a notch is provided on the back surface of the small substrate at a position where the end face electrode and the ground electrode are insulated, so that there is no problem in conduction between the end face electrode and the connection electrode or the ground electrode.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method of manufacturing a surface mount component used as a directional coupler according to the present invention will be described below with reference to the drawings. Parts that are the same as or correspond to those of the conventional example are denoted by the same reference numerals, and description thereof is omitted.

According to the present invention, a connection electrode is formed over a dividing line on the front surface of a mother substrate, and a cutout of a ground electrode is formed over a dividing line on the back surface of the mother substrate. is there.

That is, as shown in FIG. 1, strip lines 2, 6, lead-out electrodes 3a, 3b, and 3b are provided on the surface of a mother board 16 made of a dielectric material having edges 16a, 16a at both ends on the long side. Dummy electrodes 18a, 7b, input electrodes 4, output electrodes 5, 8, isolation electrodes 9, and dummy electrodes 18 located at diagonal positions of the output electrodes 8 are formed in a matrix. Among them, the even-numbered strip lines 2, 6, extraction electrodes 3a, 3b, 7a, 7b, input electrodes 4, output electrodes 5, 8, isolation electrodes 9, and dummy electrodes 18
Are the strip lines 2 and 6 of the odd-numbered stages and the extraction electrode 3
a, 3b, 7a, 7b, input electrode 4, output electrode 5, 8,
1 for the isolation electrode 9 and the dummy electrode 18
It is formed in an inverted form of 80 °.

At the same time, the edge 16 of the mother substrate 16
A dummy electrode 19 extending from the input electrode 4, the output electrodes 5, 8, the isolation electrode 9 and the dummy electrode 18 is also formed on the electrodes a and 16a.

As shown in FIG. 2, a circular or semi-circular surface is formed on the rear surface of the mother substrate 16 at a position facing the input electrodes 4, output electrodes 5, 8, isolation electrodes 9, and dummy electrodes 18, 19 on the front surface. The ground electrode 20 provided with the notch 20a is formed.

With such a configuration, the input electrodes 4, output electrodes 5, 8, isolation electrodes 9, and dummy electrodes 1 on the dividing lines 14a, 14b on the surface of the mother board 16 are formed.
8, 19 straddle the dividing lines 14a, 14b,
The notch 20a on the back also straddles the dividing line 14a or 14b.

Then, after cutting along the dividing lines 14a, 14b and dividing into a plurality of small substrates 17, as shown in FIG. End electrodes 11a, 11 that are electrically connected to electrode 9.
b, 11c, 11d, an end face electrode 11e conducting to the ground electrode 20, and an end face electrode 11f conducting to the dummy electrode 18.
Are formed to obtain the surface-mounted directional coupler 21. The input electrodes 4, output electrodes 5, 8 and isolation electrode 9 function as connection electrodes for connecting the strip lines 2, 6 to the end face electrodes 11a to 11d.

According to the above-described method, the electrode pattern on the mother substrate 16 is shifted in each of the directions A, B, C, and D shown in FIGS. 1 and 2, and the cutting is performed while being shifted from the dividing lines 14a and 14b. However, the conduction between the input electrodes 4, the output electrodes 5, 8 and the isolation electrode 9 and the end electrodes 11a to 11d, and the conduction between the ground electrode 20 and the end electrode 11e are not impaired.

It should be noted that the method of manufacturing a surface mount component according to the present invention is not limited to the directional coupler.
2 has a main electrode 23 at the center, an input electrode 24 and a dummy electrode 25 at one end, three output electrodes 26 at the other end, and a ground electrode 27 on the back. Further, the present invention can be applied to a surface mount type branch line hybrid 29 having an end face electrode 28 that is electrically connected to the input electrode 24, the dummy electrode 25, the output electrode 26, and the ground electrode 27. The present invention can be applied to an electronic component in which a mother substrate is divided into a plurality of small substrates, and an end surface electrode that is electrically connected to electrodes on the front and back surfaces is formed on the divided surface.

[0022]

As described above, according to the method for manufacturing a surface mount component according to the present invention, the notch of the connection electrode and the ground electrode is formed across the dividing line on the front and back surfaces of the mother substrate. As a result, even if a pattern shift or a cutting shift occurs, conduction between the end face electrode and the connection electrode or the ground electrode can be performed normally, and the product yield can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a mother substrate of a directional coupler according to an embodiment of the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a plan view of a directional coupler according to an embodiment of the present invention.

4A is a plan view and FIG. 4B is a cross-sectional view taken along line AA of a branch line hybrid to which the method for manufacturing a surface mount component of the present invention can be applied.

FIG. 5 is a plan view of a conventional directional coupler.

FIG. 6 is a bottom view of FIG. 5;

FIG. 7 is a plan view of a mother board of a conventional directional coupler.

FIG. 8 is a bottom view of FIG. 7;

9 is a plan view of the lowermost small substrate when the electrode pattern of FIG. 7 is shifted in the direction A. FIG.

10 is a plan view of the small substrate when the electrode pattern of FIG. 7 is shifted in the B direction.

11 is a bottom view of the small substrate when the electrode pattern of FIG. 8 is shifted in the direction A.

FIG. 12 is a bottom view of the small substrate when the electrode pattern of FIG. 8 is shifted in the B direction.

13 is a bottom view of the small substrate when the electrode pattern of FIG. 8 is shifted in the C direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2, 6 Strip line 4 Input electrode 5, 8 Output electrode 9 Isolation electrode 10 Ground electrode 11a-11f End face electrode 17 Substrate 21 Directional coupler

Claims (3)

(57) [Claims] A main electrode and a connection electrode extending from the main electrode are formed in a matrix on a surface of a mother substrate made of a dielectric, and a ground electrode provided with a cutout facing the connection electrode on a back surface is formed. A method of manufacturing a surface-mounted component, comprising: dividing the mother substrate into a plurality of small substrates along a dividing line; and forming an end surface electrode that is electrically connected to the connection electrode or the ground electrode on a divided surface of the divided small substrate. 3. The method for manufacturing a surface mount component according to claim 1, wherein the notch of the connection electrode and the ground electrode is formed so as to extend over the dividing line. 2. The method according to claim 1, wherein said surface-mounted component is a directional coupler. 3. The method according to claim 1, wherein said surface mount component is a branch line hybrid. .