JPS62113090A - Ic tester for preheater - Google Patents

Abstract

PURPOSE:To detect an IC without enlarging the space dimensions between parts by setting such that one of two optical axes crosses a small size IC transfer lane, the other crosses a medium size IC transfer lane but does not cross a heater. CONSTITUTION:An optical axis B is so set that it crosses a medium size IC2b on a small size IC transfer lane La, does not cross a medium size IC2b on a medium size IC transfer lane Lb but crosses a large size IC2c on a large size IC transfer lane Lc. Similarly, an optical axis C is so set that it crosses the medium size IC2b and the large size IC2c but does not cross a small size IC2a. Since the optical axes B and C are substantially vertically set within the range wherein the axes do not cross an electric heater 13a, it results that light projectors and light receivers (4b, 4c) and (5b, 5c) are positioned obliquely below and above a chute rail 11 and a heat block 13, respectively. Therefore, the space dimensions from adjacent rails 11' and 11'' and adjacent blocks 13' and 13'' are not increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device Mjt for detecting an IC passing through a preheater installed in an IC handler.

[Prior art]

The IC handler sequentially transports a large number of ICs, attaches them to the IC measurement sockets 1 to 1, tests their electrical performance, and classifies the ICs removed from the measurement sockets into class 5111 according to the test results. This is an automatic device for transporting items.

Since the electrical performance test described above is performed under predetermined temperature conditions, a preheater is provided when the predetermined temperature is higher than room temperature. .

A preheater is generally configured such that, while the IC is being transported by a chute rail, a heat block is placed opposite the I c l/) transport path to heat the IC during transport.

FIG. 5 is an explanatory diagram of a state in which the IC 2 is being transported by the chute rail 1.

The reason why the cross-sectional shape of the shoe 1-rail is an irregular E-shape is that large, medium, and small ICs can be transported by one chute rail.

That is, a small IC 2a can be transported as shown in FIG. 6, and a medium-sized IC 2b can be transported as shown in FIG.
It is also possible to transport a large IC 2c as shown in FIG.

FIG. 9 shows an example of a preheater according to the prior art, where 1 is the aforementioned chute rail and 2 is an IC being transported.

A heat block 3 is installed above the IC being transported with a small gap therebetween. 3a is an electric heater embedded in the heat block.

This preheater device is installed immediately before the aforementioned IC measurement socket (not shown), and the IC that has passed through the preheater is installed in the measurement sockets 1 to 1.

Therefore, in order to automatically attach and detach the measurement socket, detect II C2 passing through the preheater,
It is necessary to input the detection signal to an automatic control device (not shown).

Therefore, in the conventional technology, as shown in FIG.
Set a horizontal optical axis A (indicated by a chain arrow) that intersects with
A light receiver 5 is installed.

2. Beam Sensor IJ is a well-known device, for example Beam Sensor (trade name) manufactured by Sunkus, which is commercially available.

According to the IC detection device (FIG. 9) configured as described above, when IC2 passing through the preheater interrupts the optical path A, the light receiver! 5 can detect the disappearance of the incident light and detect the passage of the IC2, which is convenient for giving a signal to the equipment in the next process.

[Problem that the invention seeks to solve]

When the preheater is equipped with multiple sets of shift-1 to rail] and the heat block 3 in the N11 row, if the detection device of the prior art (Fig. 9) described above is installed, the adjacent heat Since the emitter and light receiver 4, 5' must be installed between the block 3' and the chute rail 1', the interval dimension W0 increases, making the entire preheater device large and heavy.

Second, as can be easily understood from FIG.
There is a problem in that it is not possible to distinguish whether the image is large, medium, or small.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to detect ICs passing through a preheater device without increasing the distance between the plurality of pairs of heat blocks and chute rails provided in the preheater device. It is possible, and
An object of the present invention is to provide a device that can identify whether an IC is large, medium, or small when the presence of the IC is detected.

[Means for solving problems]

In order to achieve the above object, the device of the present invention utilizes a small IC.
The transport lane, the medium-sized 1C transport lane, and the large IC transport lane are installed on the IC shoe 1 that has been installed (!-2).
In a device for detecting an IC passing through a preheater in which a heat block is installed opposite to the top surface of a C, two optical axes are set to intersect with each other, and - of the two optical axes is set.
・One side avoids the medium IC transport lane of the IC chute rail, crosses the small IC transport lane, and is directed approximately 1" downward, and the other of the two optical axes is the small IC transport lane of the IC chute rail. The two optical axes are set so that they do not intersect with the heaters installed in the heat block, and the chute rail and The parts of the blocks intersecting with the two optical axes are cut out, and two sets of beam sensor receivers 9 emit light along each of the two optical axes. It is characterized by having opposite hooves.

[Effect]

With the above configuration, since the optical axes that should be installed with receiver 9 emitter facing each other are not horizontal but diagonally downward, by installing receiver 2 emitter, P1 block and Chute rail installation spacing is not affected. Moreover, it is possible to distinguish whether the IC to be detected is small, medium, or small depending on which of the two sets of light emission and light reception performed along the two optical axes is blocked and which is not blocked.

〔Example〕

FIG. 1 is a sectional view of an embodiment of the present invention.

11 is shoot rail, 13 is P1~Block, +3
a is an electric heater.

The two beams of light 1liIIB and C are set diagonally up and down so that they intersect with the large IC 2c being transported on the chute rail 11'2.

The above-mentioned optical axes B and C are set in the Povo-F-F direction, but are tilted to such an extent that they do not intersect with the electric heaters 13a embedded in the blocks 1 to 13.

1-Wt: The method of setting the two lights I1illIB and C will be explained in more detail.

Figure 2 shows a state in which a small IC 2a is being transported to the shoe 1 along the small IC transport lane L+1 provided in the 1-knoll 11, and Figure 3 shows a state where the small IC 2a is being transported to the shoe 1 along the medium TC transport lane Lb. Figure 4 shows a state in which a type 1 ('; 21) is being transported, and a state in which a large IC 2 is being transported along the doll IC transport lane Lc.

The optical axis B intersects with the medium size 1c2b of the small IC transport lane i, a-l'' as shown in Figures 2 to 4, and the medium size I
It does not intersect with the medium size 1', C21) of the C transport lane L, and the large IC transport lane I, (2+ doll I C2)
(Set so that it intersects with : 1° Also, the optical axis C is similarly set as medium 1.C21), large IC2
It is set so that it intersects with c and does not intersect with small TC211.

There is a through hole near INI where the light 1i1+It, C set as above passes through blocks 1 to 13]:
1b, 13c and the optical axis 13. (There is a through hole 111 near the point where '; passes through the chute rail 11),
Wear It4・.

When carrying out the present invention, the above-mentioned through holes Nlb, 13c, 1.
]b.

], 1c does not necessarily have to be in the shape of a hole, but may be a groove. In short, it has a cutout shape so as not to interfere with the optical axis.

The two optical axes 13. Along C, two sets of emitter, receiver 4
b, 5b and 4c, 5c are installed substantially vertically facing each other.

] - Since the optical axes B and C are set directly and close to each other without intersecting with the electric heater 13a, the optical receivers 4b, 5b, and 4Cg are placed opposite to each other along the axes.
5 C is chute rail 11. heat block 13
It will be located diagonally downward by 1".

For this reason, the adjacent chute rail 11. ', Il'
' and the distance W between adjacent P1-blocks 1.3' and 13' do not increase by applying the device of the present invention. In addition, the through holes (notches may be used) 13b and 13c provided along the optical axes B and C are P1-Block1.
3] and 3a, there is no risk of interfering with the function of the P1-block 13.

The aforementioned optical axis T3. Since C is set as explained in FIGS. 2 to 4, when the small IC2a passes through the Schuteley monthly rate 1"2, only the light emission and reception along the optical axis B are instantaneous. I will block you.

Similarly, when the medium-sized IC2b passes, the light 1lIllc
Only the light emitted along the line and the light received instantaneously) (!1l) 4shi.

And the doll T C: 2 (:gatou: 1i111zuro 1 prefecture is light 11i11113.

The human power for projection and reception along C and IJ are the same as I1. The blasphemy was interrupted momentarily.

For this reason, two light receivers 5 b g 5 C's person!: I-1 So/l
li' Jg I'J When JN is detected, it is possible to detect that an IC has passed through shoes 1 to i-nord IIL, and whether the IC is large, medium, or small.

〔Effect of the invention〕

As described above, when the detection device of the present invention is applied, it is possible to detect ICs passing through the preheater without increasing the distance between the multiple pairs of chute rails and heat blocks arranged 1υ between the preheater bags. At the same time,
It has an excellent practical effect of being able to distinguish between the 10 types of dogs, medium and small.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing one embodiment of the IC detection device of the present invention. FIGS. 2 to 4 are explanatory diagrams of the structure and operation of the above embodiment. FIG. 5 is a perspective view of an IC transport chute rail, FIGS. 6 to 8 are explanatory views of the operation of the chute rail, and FIG. 9 is an explanatory view of a conventional preheater IC detection device. 1... Shoot rail, 2... IC12a... Small IC, 2b... Medium IC12c... Large IC13
...Heat block, 3a...Electric heater, 4,4
b, 4c... Beam sensor floodlight, 5, 5b, 5c
...beam sensor light receiver, 11...chute rail, 11', 11'...adjacent chute rail,
llb, llc...Through hole (cutout), 13...Heat block, 13', 13'...Adjacent heat block, 13a...Electric heater, 13b, 13c
...Through hole (notch). Patent Applicant Hitachi Electronics Engineering Co., Ltd. Representative Patent Attorney Tadashi Akimoto Figure 1

Claims (1)

[Claims] IC chute rails equipped with small IC transport lanes, medium IC transport lanes, and large IC transport lanes are installed, and ICs transported on the IC chute rails are installed.
In a device for detecting an IC passing through a preheater in which a heat block is installed facing the top surface of the IC, two optical axes are set to intersect with each other, and one of the two optical axes is connected to the IC chute rail. Avoiding the medium-sized IC transport lane, cross the small-sized IC transport lane and make it almost vertically, and the other of the two optical axes avoid the small-sized IC transport lane of the IC chute rail and intersect with the medium-sized IC transport lane. The two optical axes are set so that they do not intersect with the heaters provided in the heat block, and the chute rail and the heat block intersect with the two optical axes. Each part is cut out, and two parts are cut out along each of the two optical axes.
An IC detection device for a preheater of an IC handler, characterized in that a set of beam sensor receivers and a light emitter are installed facing each other.