JPH087233B2 - Printed circuit board measuring device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed board measuring device.
It is about.

[0002]

2. Description of the Related Art Conventionally, when measuring an electronic component such as an LSI element, as shown in FIG. 7, a lead (terminal portion 3) of an LSI element (electronic component 3) mounted on a printed circuit board 6 is conventionally used.
During a) or by touching the measuring element 7 to the reference point on the printed circuit board 6 and the lead 3a of the LSI element 3.

[0003]

However, in recent years, the density of the electronic components 3 has been increased, and the pitch between the leads of the electronic components 3 has become narrower. In the conventional method, the measurement is performed at an accurate measurement point. It is difficult to touch the child 7,
It has been pointed out that a short circuit or the like is likely to occur in an adjacent lead at the time of measurement, and the measurement reliability is lowered.

According to the present invention, the above object is achieved by the lifting means.
With multiple conveyors including a conveyor that can
Printed circuit board with multiple electronic components under test
The transport means for transporting the printed circuit board and the mounting on the printed circuit board.
The contact terminal that press-contacts with the terminal part of the measured electronic component.
A surface parallel to the printed circuit board at one end and at the other end
Arranged appropriately on the upper surface of the main body made of insulating material
It should be larger than the pitch between the terminals of the measured electronic component.
Multiple terminal strips with measuring terminals that can be deployed at different pitches
With a measuring jig having, and pressure contact with the measuring terminal of the measuring jig,
A probe with multiple probes connected to the tester
And a printed circuit board by the elevating means.
By moving the probe upward to measure the probe
Electronic parts to be measured on the printed board
Printed circuit board measurement that enables electrical measurement of terminals
This is accomplished by providing a device .

The present invention has been made to solve the above drawbacks , and has high measurement accuracy and automatic printing.
Provide a printed circuit board measuring device capable of measuring a board.
The purpose is to

[0006]

The measuring jig has the terminal piece 2 held by the main body 1, and the terminal piece 2 is provided with the contact terminal 4 and the measuring terminal 5. The contact terminals 4 are provided so as to correspond to the terminal portions 3a of the electronic component 3, and the measuring terminals 5 are spread on an appropriate portion of the main body 1, for example, the upper surface at a pitch larger than the pitch between the terminal portions 3a of the electronic component 3.

As a result, the pin between the terminal portions 3a of the electronic component 3 is
The switch is opened at the location where the measurement terminal 5 is placed.
In addition, because the area of the measuring terminal 5 becomes large, the fixture
Even if an error occurs in the set position of B, the contact point 7 is measured accurately.
Pressure contact with the constant terminal 5 improves the reliability of measurement.
be able to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows a measuring jig A configured for a surface-mount LSI, in which 3 is a QFP package LSI element (electronic component), 3a is a lead (terminal portion) of this LSI element, and 6 is the LSI element mounted. Printed circuit board.

The measuring jig A comprises a main body 1 made of an insulating material and a terminal piece 2 made of a highly conductive material. As shown in FIG. 2, the terminal pieces 2 are arranged so as to radially spread from the inner side to the outer side in a plan view, and are embedded and held in the main body 1 by, for example, integral molding.

Further, one end of the terminal piece 2 is projected on the back surface of the main body 1 to form a contact terminal 4. This contact terminal 4 is L
The leads 3 of the LSI element 3 are aligned at a pitch that matches the lead pitch of the SI element 3 and the ends are bent in a J shape.
Pressure a from the outside. As a result, the main body 1 is mounted in a state in which the leads 3a on the four side edges of the LSI element 3 are pressed by the contact terminals 4 and the LSI element 3 is held.

Further, the terminal piece 2 has a measuring terminal 5 at the end opposite to the contact terminal 4. The measuring terminal 5 is the main body 1
Is exposed to the outside, and if necessary, knurls are formed on the upper surface thereof to prevent the contact point 7 from slipping.

In this embodiment, however, the lead pitch of the LSI element 3 is widened at the measuring terminals 5, and the erroneous contact with the adjacent lead 3a or the short circuit is surely prevented. In this case, the partition wall 9 is attached to the main body 1.
It is also possible to project and to partition between the measuring terminals 5.

Next, the measuring jig A deformed for the connector is used.
Is shown in FIGS. 3 is an application to a surface mount connector, and FIG. 4 is an application example to a flat cable connector. In this embodiment, the connector (electronic component 3) is soldered and mounted on the pad 10 on the printed circuit board 6, and contacts (terminal portions 3a) are arranged in parallel in the housing 11.

The measuring jig A has a recess 12 which can be fitted into the housing 11 of the connector 3, and a contact terminal 4 plugged into the contact 3a of the connector 3 from the recess 12. The measuring terminals 5 are arranged side by side on the upper surface of the main body 1, and their pitch is made wider than the pitch of the contacts 3 a of the connector 3. In addition, when the area for developing the measuring terminals 5 cannot be secured on the upper surface of the main body 1, the measuring terminals 5 can be arranged in two stages.

FIG. 5 shows another embodiment of the present invention. The measuring jig A in this embodiment is composed of the leads 3a, 3 of the plurality of LSI elements 3 mounted on the printed board 6.
., and a plurality of contact terminals 4, 4 ... Corresponding to the contacts 3a of the connector 3, and these contact terminals 4
The main body 1 for holding is formed to have substantially the same area as the printed circuit board 6. On the other hand, the measuring terminals 5 corresponding to the contact terminals 4 are arranged on the upper surface of the main body 1 in a matrix, for example.

Therefore, in this embodiment, first, after setting the measuring jig A on the printed circuit board 6, it is possible to individually probe the measuring terminals 5 at appropriate places by using the measuring element 7. It is possible to display a circuit diagram or the like on the upper surface of the main body 1 and sequentially measure the necessary measurement points by the tester 8.

Further, FIG. 5 includes a structure of a measuring device using the above-mentioned measuring jig A. The measuring device has a plurality of conveyors 13, an elevating means 14 for elevating the central conveyor 13, and a fixture B arranged above the elevating means 14, and the printed circuit board 6 is provided with a supply part 15.
After being conveyed from the center to the center by the conveyer 13, the conveyer 13 is pushed upward by the elevating means 14 and set on the measuring jig A arranged above the conveyer 13.

The fixture B is formed by providing a plurality of stylus elements 7, 7 ... at positions corresponding to the respective measuring terminals 5 of the measuring jig A, and is set in advance on the measuring jig A.
Simultaneously with the completion of setting the printed circuit board 6 on the measuring jig A, the measurement circuit of the tester 8 is turned on, the printed circuit board 6 is measured, and the printed circuit board 6 whose measurement has been completed is moved up and down by the lifting means 1
After being lowered to the original position by 4, the sheet is discharged to the outside of the apparatus by the conveyor 13 on the side of the discharging section 16.

The measurement jig A can be mounted on the printed circuit board 6 before it is supplied to the conveyor 13. In this case, the printed circuit board 6 is lifted by the elevating means 14.
By the ascending operation of the measurement jig A, the measurement jig A and the fixture B are connected.

FIG. 6 shows a modification of the above embodiment. In this modification, the printed circuit board 6 is conveyed by the conveyor 13 and covered with the measurement jig A at a predetermined position.
The fixture B is mounted and the printed circuit board 6 is measured. The printed board 6 and the measurement jig A, and the measurement jig A and the fixture B are arranged so that the contact terminals 4 of the measurement jig A surely come into contact with the terminal portions 3a of the electronic components 3 on the printed board 6. A guide mechanism (not shown) is provided between them.

[0021]

As is apparent from the above description, according to the present invention, the pitch between the measuring terminals, which are the measurement points by the probe, can be made larger than the pitch of the terminal portion of the element. , Accidentally short-circuiting between adjacent terminal parts, or touching different terminals with the probe,
It is possible to prevent the measurement of an erroneous portion and improve the measurement accuracy.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, in which (a) is a sectional view,
(B) is a perspective view of the upper surface of the main body.

FIG. 2 is a plan view showing the arrangement of terminal pieces.

FIG. 3 is a cross-sectional view showing application to a connector.

FIG. 4 is a cross-sectional view showing a modified example of FIG.

FIG. 5 is a side view showing the measuring device.

FIG. 6 is a perspective view showing a modified example of FIG.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

 A Measuring jig B Fixture 1 Main body 2 Terminal piece 3 Electronic component 3a Terminal part 4 Contact terminal 5 Measurement terminal 6 Printed circuit board 7 Measuring element 8 Tester

Claims (1)

[Claims] 1. A conveyor that can be lifted and lowered by a lifting means.
It is composed of multiple conveyors including
Conveying means for conveying a printed circuit board on which child parts are mounted
And the terminals of the electronic device under test mounted on the printed circuit board.
One end is provided with a contact terminal that presses against the
Insulation material with appropriate width in the direction parallel to the lint substrate
Edge of the DUT to be placed on the upper surface of the body
Measuring end deployed at a pitch larger than the pitch between the child parts
A measuring jig having a plurality of terminal pieces with a child, and a compound jig that is pressed against the measuring terminals of the measuring jig and connected to the tester.
And a fixture having a number of measuring elements protruding on the lower surface, and the printed circuit board is moved upward by the elevating means.
And press the probe to the measuring terminal of the measuring jig,
Electrical measurement of terminals of electronic parts under test on printed circuit boards
A printed circuit board measurement device that enables