JPH04324378A - Recognition of burn-in board - Google Patents

Abstract

PURPOSE:To obtain a highly reliable and long life BT board capable of always stably recognizing a loaded IC without using a consumable part. CONSTITUTION:A discrimination code 11 of a binary display system discriminating the IC of a BT board 1 is formed to the reinforcing frame 10 of the BT board 1 of a substrate 2 having an IC mounted on one surface thereof and detected by an optical sensor 12 being a noncontact detection means to extract the measured data of the IC from a storage part.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to semiconductor devices (hereinafter referred to as IC).
The present invention relates to a burn-in board recognition method for recognizing a semiconductor device mounting test board (hereinafter simply referred to as a BT board) used for a bias application high temperature aging test (hereinafter simply referred to as a BT test) in a test board (hereinafter simply referred to as a BT board).

0002

2. Description of the Related Art Conventionally, when performing a BT test using a BT furnace, first, an IC is inserted into a BT board having IC sockets regularly arranged on one surface, and then housed in the BT furnace. Next, data on each IC, such as good products and defective products, is collected, and the obtained measurement data is stored in a storage medium using the identification code of each BT board as an index. Next, the insertion/extraction machine reads the identification code unique to each BT board,
Data that matches the identification code is read from the storage medium, and based on this data, good products and defective products are sorted out.

FIGS. 3A and 3B are diagrams showing an example of a conventional BT board, and FIG. 4 is a diagram for explaining the operation of the BT board shown in FIG.

In the above work, FIGS. 3 and 4 show how to read the identification code unique to each BT board.
Explain using. Conventionally, the substrate 2 of the BT board is shown in FIG.
As shown in FIG. 2, there are two types: one in which diodes 4a are arranged on a part of the board 2 as an identification code unique to the BT board, and the other in which resistors 4b having different resistance values are arranged in a part of the board 2.

The diodes 3 and resistors 4 arranged on a part of the substrate 2 of these BT boards are electronic components, and when set in the BT furnace, measurement data is transmitted from the terminal assigned for the identification code of the terminal section 5. Read and use these terminals as an index.

[0006] Furthermore, when reading the unique identification code of the BT board with the insertion/extraction machine 3, as shown in FIG. The insertion/extraction machine 3 is transported to a specific location, and the socket 6 is connected to the terminal portion 5. Next, the recognition unit 7 detects the presence or absence of a voltage if it is a diode, or detects its resistance value if it is a resistor, and determines it as an identification code unique to the BT board. Next, after the identification code is determined by the recognition unit 7,
The data written in the same index as the identification code is sent to the control unit 8 and read from the data storage unit 9, and the ICs are classified and extracted from the BT board based on the data.

[0007]

[Problems to be Solved by the Invention] As described above, in the conventional insertion/extraction machine described above, in order to detect the identification code of the BT board, the operation of inserting the terminal into the socket, reading it, and removing it is repeated at high frequency. As a result, the socket's lifespan was extremely short.

[0008] Furthermore, since the number of times the terminals are contacted per BT board has increased, the deterioration of the terminals has also become significant.
The reliability of the value read from the BT board identification code is BT
Both in the furnace and in the insertion/extraction machine, there was a problem that not only the work efficiency was lowered but also work errors were caused.

SUMMARY OF THE INVENTION An object of the present invention is to provide a BT board that can more reliably recognize an identification code without contact, in order to solve this problem.

0010

[Means for Solving the Problems] The burn-in board recognition method of the present invention includes forming a binary tee display means for identifying the ICs on a reinforcing frame of a board on which a plurality of ICs are mounted, and using the display means as a detection means. The method is characterized in that the IC is identified and the measurement data of each of the ICs is extracted from a storage unit in which it is stored.

Further, a burn-in board used in the burn-in board recognition method of the present invention is characterized in that the display means is composed of a plurality of holes, and the detection means is an optical sensor.

Furthermore, another burn-in board used in the burn-in board recognition method of the present invention is characterized in that the display means is a magnet attached, and the detection means is a magnetic sensor.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1(a) is a side view of a BT board showing an embodiment of the present invention, FIG. 1(b) is an enlarged view of the portion of FIG. 1(a), and FIG. 2 is an operation of the BT board of FIG. 1. FIG. As shown in FIG. 1, this BT board has one base hole 11a and 16 identification holes 11b drilled in a part of the reinforcing frame 10 reinforcing the board 2 for identification. This is because an identification code 11 shown in binary format is provided. In other words, no holes are made at the point corresponding to 0, but holes are made at equal intervals of pitch p. Further, these identification holes 11b are manufactured to match identification codes set by electronic components such as diodes 3 and resistors 4 arranged on the substrate 2.

Next, the operation of this BT board will be explained. As shown in FIG. 2, first, a base hole 11a and an identification hole 11b made in a part of the reinforcing frame 10 of the BT board 1
11q, an optical sensor 12 connected to the insertion/extraction machine 3 is installed near the entrance of the transport rail 13. Next, by fitting the BT board 1 into the transport rail 13 and moving the BT board 1, the optical sensor 12 detects the identification hole 11b. Then, the recognition unit 7 sends the binary signal to the control unit 8, and the control unit 8 sends it to the storage unit 9 that stores the measurement result data in the BT furnace.

In this way, the BT board 1 with the identification code 11 attached to a part of the reinforcing frame 10 of the BT board 1 is inserted into the insertion/extraction machine 3.
Set the number of BT boards on the board, and pull out the BT board at a constant speed along the transport rail 13 in the direction of arrow 14 using the pull-out claw.
When passing through the optical sensor 12 and first detecting the base hole 11a, the recognition unit 7 sends a signal to the control unit 8, and from the time the signal is received, feedback regarding the amount of movement of the drive motor that operates the pull-out claw is provided. The signal is counted, and when it reaches a preset value, the signal is sent to the recognition unit 7, and the presence or absence of the identification hole 11b at that time is detected,
A signal will be sent to the control unit 8 again.

After that, by repeating the above operation, the identification hole 1 is
The recognition unit 7 detects the presence or absence of all holes up to 1q, determines the identification code 11 unique to the BT board, sends a signal to the control unit 8, and stores the identification code 11 sent from the recognition unit 7 from the storage unit 9.
, the data is set in the control unit 8, and classification sampling is performed based on the data.

[0017] By performing the same procedure for the second and subsequent BT boards, classification sampling can be performed.

Further, the identification hole 11b of the identification code 11 is 16
Since it is a bit configuration, it can support 65536 types, but it can be supported by increasing the number of bits.
The types of BT boards can be easily increased. moreover,
For the identification holes 11b, all holes corresponding to a certain number of bits are drilled in binary format in each BT board 1 at equal intervals with a pitch q, and the optical sensor 12 is used in the part corresponding to 0 in the binary display of the identification code 1. It is also possible to create an identification code by filling the holes with a material that has a high reflectivity that can be detected.

[0019] As another embodiment, a magnet is embedded in a BT board at a position corresponding to 1 in binary display in the identification hole in which all holes corresponding to a certain number of bits are drilled at equal intervals of pitch q in binary format. By arranging a magnetic proximity sensor on a part of the transport rail, the identification code of the BT board can be read in the same procedure as in the previous embodiment.

[0020]

As explained above, the present invention reduces consumable parts by providing means for indicating a binary code for identifying ICs arranged on a board and means for detecting this identification means without contact. This has the effect of providing a burn-in board recognition method that allows stable reading of the identification code without using it, and a highly reliable and long-life BT board.

[Brief explanation of drawings]

FIG. 1A is a side view of a BT board, and FIG. 1B is a partially enlarged view showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the BT board in FIG. 1;

FIG. 3 is a diagram showing an example of a substrate of a conventional BT board.

FIG. 4 is a diagram for explaining the operation of the BT board in FIG. 3;

[Explanation of symbols]

1 BT board 2　　　　Substrate 3 Insertion/extraction machine 4a Diode 4b Resistance 5 Terminal section 6 Socket 7 Recognition section 8 Control section 9. Storage section 10 Reinforcement frame 11 Recognition code 11a Base hole 11b Identification hole 12 Optical sensor 13 Conveyance rail

Claims (3)

[Claims] 1. Binary display means for identifying the ICs is formed on a reinforcing frame of a board on which a plurality of ICs are mounted, the display means is identified by a detection means, and measurement data of each of the ICs is stored. A method for recognizing a bar-in-board characterized by extracting it from a storage section. 2. The display means comprises a plurality of holes,
A burn-in board characterized in that the detection means is an optical sensor. 3. A burn-in board, wherein the display means is a magnet attached, and the detection means is a magnetic sensor.