WO2009104526A1

WO2009104526A1 - Test device

Info

Publication number: WO2009104526A1
Application number: PCT/JP2009/052463
Authority: WO
Inventors: 仁斎藤; 靖中島; 誠辻
Original assignee: シャープ株式会社
Priority date: 2008-02-18
Filing date: 2009-02-16
Publication date: 2009-08-27
Also published as: JP2009192466A; JP4989508B2

Abstract

Provided is a test device which can significantly reduce the time required for testing a solid state imaging device. The test device includes: a first tray (2) having a plurality of containers having a gap penetrating through an insert direction of an object to be contained; a test chart (10) which can be imaged by camera modules (3) contained in the respective containers; a contactor (7) which can be brought into contact with an electrode formed on the rear surface opposite to the main surface of the camera modules (3) opposing to the test chart (10); and an inspection unit (20) which can analyze an imaging result given from the camera modules (3) via the contactor (7). In the state that a plurality of camera modules (3) are contained in the respective containers, at least one test chart (10) can be set within the range of the field of view of the camera modules (3).

Description

Test equipment

The present invention relates to a test apparatus, and more particularly to a test apparatus capable of performing a test with a camera module stored in a tray.

With the widespread use of digital still cameras, mobile phones with cameras, surveillance cameras, etc., the demand for solid-state imaging devices used for them has increased, and the production volume has also increased.

In the manufacturing process of the solid-state imaging device, a test chart is imaged by the solid-state imaging device and an image quality test is performed. This image quality test is performed by inserting a solid-state imaging device into a dedicated socket and imaging a test chart from the opening of the socket. Since this is usually performed manually by inserting it into the socket one by one, it is very inefficient and it has become difficult to cope with the recent increase in production quantity.

Therefore, conventionally, a test apparatus as described in Patent Document 1 below has been proposed. In this method, the solid-state imaging devices housed in the tray are transferred one by one from the tray to the mounting unit by the transfer unit, and the image quality inspection is performed using a test chart or light source provided on the upper portion of the mounting unit. Since the process is automatically performed from the conveyance to the test, the throughput is improved as compared with the case of measuring manually one by one.

In addition, as a test apparatus for an IC package, a test apparatus capable of testing while being stored in a tray has been devised in Patent Document 2 below. According to Patent Literature 2, a hole can be provided in the tray so that the terminal of the IC package can come into contact with the contact of the measuring unit of the inspection apparatus, and the test can be performed while being stored in the tray. This eliminates the need for providing a time and mechanism for transferring the IC package to the test socket.

JP 2007-163453 A Japanese Patent Laid-Open No. 7-12894

In the test apparatus of Patent Document 1, since the solid-state imaging device is transferred one by one and only two pieces can be tested at a time, there is a problem that it takes a very long time to carry and test.

In order to solve such a problem, it is conceivable to shorten the time by performing the test while being stored in the tray using the method described in Patent Document 2. However, in the apparatus of Patent Document 2, since the contact pusher is present on the upper part of the package, the test chart cannot be imaged and the solid-state imaging apparatus cannot be tested. Furthermore, as described in Patent Document 2, it is not a device that uses a lead as a terminal, but a device that uses, for example, a solder ball or a pad as a terminal, or a terminal that is random in the package. A device arranged at a certain position cannot be tested because the contact of the test apparatus and the terminal of the device cannot be brought into contact with the tray having the structure as in Patent Document 2.

In view of the above problems, an object of the present invention is to provide a test apparatus that can significantly reduce the time required for testing a solid-state imaging device.

In order to achieve the above object, a test apparatus according to the present invention captures an image by a first tray having a plurality of accommodating portions each having a gap penetrating in the insertion direction of an object to be accommodated, and a camera module accommodated in the accommodating portion. A possible test chart, a contactor capable of contacting an electrode of the camera module formed on the back side opposite to the main surface side of the camera module facing the test chart, and electrically connected to the contactor, An inspection unit capable of analyzing an imaging result given from the camera module via the contactor, and at least one of the plurality of camera modules is housed in the plurality of housing units. The first feature is that the test chart is configured to be installed within a viewing angle range of the plurality of camera modules. .

According to the first characteristic configuration of the test apparatus according to the present invention, a test chart is imaged by a plurality of camera modules in a state where the camera module is mounted in each accommodating portion of the first tray, and is sent out via the contactor. By analyzing the obtained imaging result by the inspection unit, an image test can be performed at a time on a plurality of camera modules in which the test chart is located within the viewing angle range. For this reason, the test time is significantly shortened as compared with the conventional method of transferring the camera modules one by one.

In addition, since the first tray in which the camera module is accommodated is formed with a gap penetrating in the insertion direction, the image sensor formed on the main surface side is opposed to the test chart while the back surface is It is possible to electrically connect the formed electrode and the contactor. Accordingly, the test can be performed in a state where the camera module is housed in the tray, so that the control mechanism is simplified as compared with the case where the test is performed while individually conveying the camera module.

In addition to the first characteristic configuration, the test apparatus according to the present invention is configured such that the test chart is installed below the first tray and can be imaged downward by the camera module. The second feature.

According to the second characteristic configuration of the test apparatus according to the present invention, the amount of foreign matter adhering to the surface of the camera module or the lens can be greatly reduced as compared with the case where the camera module is configured upward. Thereby, the influence of the foreign material adhering to the camera module or the lens surface can be reduced.

In the test apparatus according to the present invention, in addition to the first or second characteristic configuration, each of the plurality of camera modules is inserted into the plurality of accommodating portions with the main surface side facing downward. Thus, the third feature is that it is accommodated in each of the accommodating portions.

At this time, if the camera module specifically has a structure in which the width on the main surface side on which the imaging element is formed is narrower than the width on the back surface side on which the electrodes are formed, the housing portion has a tapered shape. In this state, by inserting the camera module into the housing portion with the main surface side facing down, the main surface side can be stably housed in the housing portion with the main surface side facing down.

Further, in addition to any one of the first to third feature configurations, the test apparatus according to the present invention includes all the cameras related to one row or one column of the plurality of camera modules arranged in a matrix. The fourth feature is that one or a plurality of the test charts are provided along the row direction or the column direction so that one test chart exists at a time within each viewing angle range of the module. And

In addition to the fourth feature configuration, the test apparatus according to the present invention may be configured such that after the imaging of the test chart is completed by all the camera modules for one row or one column, the first tray is arranged in the column direction. Alternatively, a fifth feature is that the structure is configured to be movable in the row direction.

According to the fifth characteristic configuration of the test apparatus according to the present invention, the image test for the camera module in which the test chart is installed within the viewing angle range, and the transfer of the first tray in the column direction or the row direction are performed. By sequentially executing the test, it is possible to continuously execute the test on all the camera modules accommodated in the first tray. Thereby, the time required for the test can be further shortened.

The test apparatus according to the present invention further includes a camera module position adjusting unit capable of adjusting the position of the camera module to a predetermined standard position in the housing unit in addition to any one of the first to fifth characteristic configurations. The camera module position adjustment unit confirms the installation position of the camera module before the camera module images the test chart, and when the camera module is not installed at the standard position, The sixth characteristic is that the position is adjusted.

According to the sixth characteristic configuration of the test apparatus according to the present invention, when any camera module is misaligned at the first time when each camera module is accommodated in each accommodating portion of the first tray. Even so, since the position can be adjusted before the start of the test, a highly accurate image test can be performed on each camera module.

The test apparatus according to the present invention has a second tray that can be superposed on the first tray in addition to any one of the first to sixth features, and what is the insertion direction? After the second tray is placed on the surface of the first tray in the reverse release direction, the camera module is released from the first tray in the release direction, whereby the camera module is removed from the second tray. The seventh feature is that it is configured to be housed inside.

According to the seventh characteristic configuration of the test apparatus according to the present invention, a plurality of camera modules accommodated in the first tray after the test can be transferred to the second tray at a time. Accordingly, the plurality of camera modules after the completion of the test can be transferred to the area where the post-test process is performed for each second tray as it is. Therefore, it is not necessary to manually transfer the camera modules one by one as in the prior art, and the camera module after the test can be transferred to the next process in a short time.

Further, in addition to any one of the first to seventh characteristic configurations, the test apparatus according to the present invention includes a lens inserted in the gap, and the lens is inserted in the housing portion. The test chart is positioned between the main surface side of the camera module and the test chart at the time of housing, and the test chart can be imaged through the lens by the camera module housed in the housing section. Eight features.

According to the eighth characteristic configuration of the test apparatus according to the present invention, an image test can be performed on a camera module having no built-in lens as in the camera module having a built-in lens.

According to the configuration of the present invention, a test chart is imaged by a plurality of camera modules in a state where the camera module is mounted in each accommodating portion of the first tray, and the imaging result sent through the contactor is analyzed by the inspection unit. Thus, an image test can be performed at a time on a plurality of camera modules in which the test chart is located within the viewing angle range. For this reason, the test time can be greatly shortened compared with the conventional method of transferring the camera modules one by one.

Conceptual structural diagram of a test apparatus according to the present invention Enlarged view of the tray Schematic showing how to install the camera module at the standard position in the tray compartment Diagram showing schematic configuration of test head Schematic showing one example of test chart Example of tray transfer when re-inspecting a camera module determined to be defective Conceptual diagram showing a state where a non-defective camera module is transferred to a transfer tray Conceptual diagram for garbage / simitest Conceptual diagram when performing image test and electrical characteristic test in parallel Conceptual diagram when storing the camera module in the tray facing upward Conceptual diagram when performing position adjustment and test chart imaging in parallel Conceptual diagram of a tray with a lens The conceptual diagram which shows the Example when one test chart is located in the viewing angle range of several camera modules

Explanation of symbols

1: Test apparatus according to the present invention 2: Tray 3: Camera module 4: Tray mounting table 5: Test chart for dust / stain test 6: Test head for image test 6a: Test head for electrical characteristic test 7: Contactor 8: Defect Module pickup unit 10: Test chart for image test 11, 12: Motor 13: Projection detection sensor 14: Position adjustment arm 17: Motor controller 20: Inspection unit 23: Housing unit 25: Lid 30: Camera module position adjustment unit 31: Lens 32: Lens 41: Test module 42: Wiring 43: Weight sensor 51: Electrode 61: Support base 62: Support arm 63: Fastener 64: Adjustment groove 65: Rail 71: Adhesive roller 2: Brush 73: Air 81: transport trays

Hereinafter, an embodiment of a test apparatus according to the present invention (hereinafter referred to as “the present apparatus” as appropriate) will be described with reference to the drawings.

FIG. 1 is a conceptual structural diagram of the device of the present invention, where (a) shows a view from above, and (b) shows a view from the front.

The apparatus 1 of the present invention includes a tray 2 capable of accommodating a camera module (solid-state imaging device) 3, a tray mounting table 4 on which the tray 2 is installed, a dust / smear test test chart 5, an image test test head 6, and a contactor 7. , A defective module pickup unit 8, an image test test chart 10,

motors

11 and 12, a motor controller 17, an inspection unit 20 that analyzes a captured image, and a camera module position adjustment unit 30. Note that the tray mounting table 4 is formed with a gap in the predetermined area 4a, and the tray 2 is formed with a dimension width larger than the gap width related to the area 4a. In other words, by placing the tray 2 at a position including the area 4a, the tray 2 does not fall from the gap in the area 4a, and the lower part of the tray 2 can be exposed. .

2A and 2B are enlarged views of the tray 2. FIG. 2A is a perspective view, FIG. 2B is a cross-sectional view of a portion of the tray 2 in a state where the camera module 3 is not accommodated, and FIG. The cross-sectional views of a part of the tray 2 in the state in which they are placed are shown. As shown in FIG. 2, a plurality of storage portions 23 are formed in the tray 2, and the camera module 3 can be stored in each storage portion 23. The housing part 23 is formed to have a gap that penetrates in the insertion direction d1 (here, downward) of the camera module 3, and in the state where the camera module 3 is housed in the housing part 23, the module 3 is configured to be able to image a subject below the tray 2.

Further, the camera module 3 shown in FIG. 2 has a structure in which the width W1 of the main surface side B1 where the imaging element and the lens 31 are formed is smaller than the width W2 of the back surface side B2 where the electrode connected to the contactor 7 is formed. It has become. For this reason, in order to stably accommodate the camera module 3 having such a shape downward in the accommodating portion 23, the accommodating portion 23 is formed so that the inner diameter of the lower portion is narrower than the inner diameter of the upper portion.

In the state where the camera module 3 is housed in the housing portion 23 as described above, the tray 2 is moved in the moving direction d2 on the tray mounting base 4 (see FIG. 1). First, the camera module position adjustment unit 30 confirms whether each camera module 3 is correctly stored in a predetermined standard position in the storage unit 23 and is not stored in the standard position (ie, If the camera module 3 protrudes, the camera module 3 is adjusted to the standard position.

FIG. 3 is a schematic diagram showing a method for accommodating the camera module 3 in the standard position in the accommodating portion 23, where (a) is accommodated in the standard position and (b) is deviated from the standard position. Is shown.

The camera module position adjustment unit 30 includes a protrusion detection sensor 13 for confirming the accommodation position of each camera module 3 and a position adjustment arm 14 that actually moves the camera module 3 to adjust the position.

The protrusion detection sensor 13 is composed of two sensor elements installed so as to sandwich the tray 2, and is configured to be able to check the protrusion state of one or several rows of camera modules 3 located between the two sensors. When the protruding state of the camera modules 3 corresponding to one or several rows is confirmed by the protrusion detection sensor 13, the tray 2 is moved in the moving direction d2 to move the camera module 3 that has not been confirmed yet to the sensor 13. To be within the detectable range. At the same time, among the camera modules 3 whose protruding state has been confirmed in the previous stage, a camera module 3 that is not actually accommodated in the standard position (hereinafter referred to as “adjustable camera module” as appropriate) is attached to the position adjustment arm. 14 to move to the standard position. More specifically, for example, the tip of the position adjustment arm 14 has a suction cup shape, and after the camera module requiring adjustment is once lifted by the position adjustment arm 14, the position adjustment arm 14 is inserted downward into the accommodating portion 23 accommodated again. Try again. The number of sensor elements may be three or more as long as the protruding state can be confirmed.

As described above, after confirming that all the camera modules 3 installed in the tray 2 have been correctly installed in the standard position in the accommodating portion 23, or after having been correctly installed in the standard position, the tray 2 is transferred below the test head 6 for image test (hereinafter abbreviated as “test head 6” as appropriate).

4A and 4B are diagrams showing a schematic configuration of the test head, in which FIG. 4A is a front view and FIG. 4B is an enlarged view illustrating the camera module 3 in detail.

As shown in FIG. 4, the test head 6 is provided with a plurality of test modules 41, and the test modules 41 and the contactors 7 are electrically connected. In addition, the test module 41 is electrically connected to the inspection unit 20 via the wiring 42. The inspection unit 20 includes a device (for example, a computer) that can perform arithmetic processing based on an applied electric signal.

When the tray 2 is transferred to the lower side of the test head 6, the contactor 7 moves downward to come into contact with the electrode 51 formed on the back side of the target camera module 3. The contactor 7 makes contact with the electrode 51 in order to reduce dents on the electrode 51 or to reduce damage to the camera module 3 due to an impact at the time of contact with the electrode 51, and to further improve the throughput. It descends at a high speed to the vicinity where it moves, and slowly descends from the vicinity of the electrode 51 until it contacts the electrode 51. After the contactor 7 comes into contact with the electrode 51, the weight sensor 43 adjusts the position where the contactor 7 descends so as not to apply excessive weight and cause damage or damage.

After the contactor 7 comes into contact with the electrode 51 and is adjusted to an appropriate position, the camera module 3 has an image test test chart 10 installed below the tray 2 (hereinafter abbreviated as “test chart 10” as appropriate). Image. As described above, since the housing portion 23 has a gap penetrating in the vertical direction, the camera module 3 housed so that the main surface side faces downward is positioned downward via the gap 4 a in the tray installation base 4. The test chart 10 is exposed to the surface of the test chart 10 and disposed below the test chart 10. As a result, the test chart 10 is positioned within the viewing angle range of the camera module 3 (imaging device) formed on the main surface side, and the test chart 10 can be imaged by the camera module 3. A signal captured by the camera module 3 is sent from the contactor 7 to the inspection unit 20 through the wiring 42. The inspection unit 20 performs an image quality inspection based on this signal, and determines whether the camera module 3 is good or bad.

FIG. 5 is a schematic view showing an example of the test chart 10. FIG. 5A is a diagram showing an overall configuration including a test chart and a support base for supporting the test chart, and FIG. 5B conceptually shows the positional relationship between the camera module 3 and the test chart 10. FIG.

As shown in FIG. 5A, the test chart 10 is supported by a support base 61. The support base 61 is installed on two rails 65 in which two intersecting support arms 62 extend in parallel, and the height can be adjusted by opening and closing the support arms 62. Yes. The two support arms 62 are fastened by a fastener 63 at the intersection, and the height of the support arm 62 can be changed by sliding the inside of the adjusting groove 64 provided in the support arm 62. . The lower part of the support arm can be opened and closed by moving on the rail 65. As described above, the height of the support base 61 can be adjusted without changing the test chart 10 even for the camera modules 3 having different focal lengths by being configured so that the height of the support base 61 can be adjusted. Only with this, the test with the device 1 of the present invention becomes possible. The operation of the support base 61, the support arm 62, and the like is controlled by the motor 11 based on a control instruction from the motor controller 17.

The test chart 10 is configured to be located within the viewing angle range of all the camera modules 3 belonging to the same row among the camera modules 3 accommodated in the tray 2. As shown in FIG. 5B, in the present embodiment, for all the camera modules 3 belonging to the same column, the test is performed so that one different test chart 10 is located within the viewing angle range of each camera module 3. A chart 10 is installed.

As shown in FIG. 5, the test chart 10 is provided with cleaning mechanisms such as an adhesive roller 71, a brush 72, and air 73, so that the test chart 10 can be cleaned. More specifically, the test chart 10 is cleaned by adhering and removing foreign matter on the test chart 10 with the adhesive roller 71, removing foreign matter with the brush 72, or blowing off foreign matter with the air 73, It is possible to always keep a correct image test.

The camera module 3 is tested by imaging the test chart 10 thus configured with the camera module 3. Specifically, among the plurality of camera modules 3 arranged in a matrix in the tray 2, all the camera modules 3 belonging to the same column take an image of the test chart 10, and these imaging results are given to the inspection unit 20. It is done. The inspection unit 20 analyzes the given imaging result and determines whether or not a defective product exists in the plurality of camera modules 3 belonging to the target column. If there is a defective product, the defective module pickup unit 8 selects the defective product, and the selected defective module is sent to a defective product storage location (box or tray).

In this way, when the pass / fail judgment of the camera modules 3 related to one row is completed, the tray 2 is transferred by one row, and the pass / fail judgment of the camera modules 3 related to the adjacent row is continuously performed in the same manner. Thereafter, the pass / fail judgment and the transfer of the tray 2 are alternately performed, whereby the pass / fail judgment of all the camera modules 3 accommodated in the tray 2 and the sorting of defective products are completed. The defective module pickup unit 8 is controlled by the motor 12 based on a control instruction from the motor controller 17 to transfer the defective module to a defective product storage location.

In addition, in order to improve the accuracy of the quality determination, only the camera module 3 determined to be defective may be inspected again. FIG. 6 shows an example of transferring the tray 2 when the camera module 3 determined to be defective is inspected again.

As described above, the quality of the camera module 3 is determined for each row in the tray 2 while the tray 2 moves on the tray mounting table 4 in the moving direction d2. After all the inspections of all the camera modules 3 stored in the tray 2 are completed, only the camera module 3 determined to be defective is re-operated while moving the tray 2 in the reverse direction d3 opposite to d2. inspect. At this time, the position information in the tray 2 of the camera module 3 determined to be defective is stored by the inspection unit 20, and only the camera module 3 determined to be defective based on the stored information is stored. A re-inspection may be performed. Similarly, the accuracy of the pass / fail judgment can be increased by moving again in the reverse direction d3 and re-inspecting only the modules for which the failure is judged sequentially.

In this way, when the non-defective product and the defective product are identified and the camera module 3 determined to be defective is selected, only the non-defective camera module 3 is accommodated in the tray 2. The non-defective camera module 3 selected in this way is transferred to a transfer tray for delivery to an area where the next process is performed.

FIG. 7 is a conceptual diagram showing a state in which the non-defective camera module 3 is transferred to the transfer tray. The defective camera module 3 is sorted, and a transfer tray 81 is overlaid on the tray 2 in which only good products are accommodated. The transfer tray 81 has a structure that can be overlapped with the (test) tray 2 by a guide pin or the like, and has a storage portion having at least one surface opened at the same position as the storage portion 23 provided in the tray 2. Yes. Under the condition that the transfer tray 81 is superposed on the upper side of the tray 2, the upper and lower sides of both

trays

2 and 81 are sandwiched by the arms 82 and rotated approximately 180 degrees to invert the upper and lower sides.

As described above with reference to FIG. 2, the accommodating portion 23 included in the tray 2 has a tapered shape. That is, at the time of inspection, in order to prevent the accommodated camera module 3 from falling downward, the one with the narrower gap diameter (the main surface side of the accommodated camera module 3) is held downward. The tray 2 was transferred with the wider diameter (the back side of the camera module 3) facing upward. However, by reversing as described above, the back side of the accommodating portion 23 with the large diameter of the gap becomes downward, so that the stored camera module 3 naturally falls downward. And the camera module 3 is accommodated in each accommodating part in the tray 81 for transfer overlapped on the lower side of the tray 2. Accordingly, the camera module 3 accommodated in the tray 2 can be transferred to the transfer tray 81 by a simple method, and the camera module 3 for each tray 81 can be transferred to an area where the post-inspection process is performed. There is no need to manually transfer modules 3 one by one.

FIG. 8 is a conceptual diagram when a dust / smear test is performed. The possibility that dust and stains are attached to the surface of the camera module 3 cannot be denied. The presence of dust or stain is caused by the camera module 3 to capture a dedicated dust / stain test test chart 5 (hereinafter, abbreviated as “test chart 5” as appropriate), which is different from the test chart 10, for example, painted in white. The image pickup result can be analyzed by the inspection unit 20. Therefore, when the dust / stain test is performed by the apparatus 1 of the present invention, the test chart 5 is moved below the tray 2 so that the camera module 3 and the test chart 5 face each other, and the inspection chart 5 is displayed by the camera module 3. Inspection is possible by imaging. At this time, the test chart 5 can be placed close to the installation table 4, and the test chart 5 can be moved to face the camera module 3 so as to be positioned in the gap 4 a. By doing so, the distance between the camera module 3 and the dust / spot test test chart 5 can be narrowed, and the accuracy of the dust / spot test can be increased.

With this configuration, the dust / stain test can be executed by the device 1 of the present invention, and there is no need to prepare a dedicated device.

Note that this dust / smear test may be performed on each camera module 3 before the inspection using the test chart 10 of each camera module 3 is performed.

As described above, the configuration of the device 1 of the present invention makes it possible to test the camera modules 3 belonging to the same row among the camera modules 3 accommodated in the tray 2 at a time. For this reason, the test time is significantly shortened compared with the conventional method in which the camera modules are transferred one by one and the test of about two camera modules is performed at a time.

Further, the tray 2 of the device 1 of the present invention has an air gap penetrating in the direction d1 (here, downward) as shown in FIG. The electrode 51 formed on the back surface side and the contactor 7 can be electrically connected while facing the test chart 10. Thereby, since the test can be performed with the camera module 3 being accommodated in the tray 2, the control mechanism is simplified as compared with the case where the test is performed while individually conveying the camera module.

In parallel with performing the imaging test of the camera module 3 using the image test test head 6 and the test chart 10, a part of the camera module 3 not performing the image test is subjected to a test other than the image test. A test (for example, an electrical characteristic test) may be performed.

FIG. 9 is a conceptual diagram when an image test and an electrical characteristic test are performed in parallel. In addition to the image test test head 6, the apparatus 1 of the present invention further includes an electrical characteristic test head 6a for testing electrical characteristics such as current consumption. As a result, an electrical characteristic test is performed on a plurality of camera modules 3b other than the camera module 3a in parallel with performing an image test on a plurality of predetermined camera modules 3a using the image test test head 6. The electrical test can be performed using the test head 6a. More specifically, the configuration is such that a plurality of camera modules are tested for each row, and the row for performing the image test is different from the row for performing the electrical characteristic test, and the tray 2 is placed one row at the end of each test. By transferring, the image test and the electrical property test can be executed in parallel. As a result, a plurality of tests can be efficiently executed for each camera module 3 by one test apparatus, and the test time can be shortened.

In the electrical characteristic test, unlike the image test, the subject (test chart 10) is not imaged by the camera module 3. Therefore, no chart is installed below the electrical characteristic test head 6a, and the image test is performed. The test chart 10 is installed only below the test head 6.

Although the electrical characteristic test has been described as an example here, it is needless to say that the test is not limited to the electrical characteristic test, and a test for performing a test other than the image test in addition to the test head 6 for the image test. A head may be provided and performed in parallel with the image test.

Hereinafter, another embodiment will be described.

<1> In the above-described embodiment, the camera module 3 is inserted into the tray 2 downward, and the test chart 10 placed below the tray 2 is imaged to test the camera module 3. However, the orientation of the camera module 3 during the test is not limited to the downward direction. For example, the camera module 3 is accommodated in the accommodating portion 23 of the tray 2 so that the camera module 3 faces upward, and the test of the camera module 3 is performed by imaging the test chart 10 installed above the tray 2. It is also good.

FIG. 10 shows a conceptual diagram in the case where the camera module 3 is housed in the tray 2 with the main surface side (imaging element forming side) facing upward. The tray 2 is formed with a gap penetrating in the vertical direction, as shown in FIG. 2 (see FIG. 10A and an enlarged view). In addition, unlike the case of FIG. 2, it inserts in the accommodating part in the tray 2 with the main surface side facing up. In this case, the main surface side on which the imaging element of the camera module 3 is formed is exposed upward, and the back surface side on which the electrode 51 is formed is exposed downward.

Then, a lid 25 for fixing the camera module 3 in the accommodating portion is attached to the upper surface of the tray 2 (see FIGS. 10B and 10C). FIG. 10B shows a state before the lid 25 is attached to the upper surface of the tray 2, and FIG. 10C shows a state after the lid 25 is attached to the upper surface of the tray 2. The lid 25 has a gap penetrating in the vertical direction at a position corresponding to each storage portion 23 in the tray 2, and the width of the gap is substantially equal to the width on the main surface side of the camera module 3. Is formed. That is, when the lid 25 is attached to the upper surface of the tray 2, the main surface side of the camera module 3 is exposed upward via the gap of the tray 2 and the gap of the lid 25, and the subject above the tray 2 is exposed. Imaging becomes possible.

In this way, each camera module 3 is attached to the accommodating portion 23 in the tray 2 and the lid 25 is further overlapped, and the tray 2 is placed on the electrode 51 formed on the back side of the camera module 3. An image test can be performed by contacting the contactor 7 from below and capturing an image of the test chart 10 installed above the tray 2. Also in this case, an image test of the camera module 3 can be performed while being placed on the tray 2, and a plurality of camera modules 3 can be tested at the same time as in the above embodiment. Test time is greatly reduced compared to the conventional method of transferring one by one.

Note that, as in the above-described embodiment, when the test chart 10 installed below the tray 2 is imaged, the main surface side of the camera module 3 on which the image sensor is formed faces downward. For this reason, as shown in FIG. 10, the amount of foreign matter adhering to the surface of the camera module 3 or the lens is greatly reduced as compared with the case where the main surface side of the camera module 3 faces upward. In the embodiment described above, in principle, foreign matter may adhere to the surface of the test chart 10, but the influence of the foreign matter increases as the distance from the camera module 3 becomes shorter. Compared with the influence of foreign matter adhering to the surface, the influence of foreign matter adhering to the surface of the test chart 10 may be ignored. Therefore, it is desirable to image the test chart 10 downward as in the above-described embodiment in that the influence of the adhered foreign matter during the test can be reduced.

Also, the imaging direction (the direction from the camera module 3 toward the test chart 10) and the insertion direction of the camera module 3 into the tray 2 may be different. In other words, for example, the camera module 3 may be inserted upward into each housing portion 23 of the tray 2 and the test chart 10 installed below the tray 2 may be imaged downward by the camera module 3. In this case, the main surface side and the back surface side of the camera module 3 are substantially the same width, or the width of the back surface side is formed narrower than the main surface side, and the back surface side of the camera module 3 is brought closer to the tray 2 so as to be accommodated. It can be inserted into 23.

Alternatively, after each camera module 3 is accommodated in the accommodating portion 23 of the tray 2, the tray 2 is rotated so that the camera module 3 is directed to the test chart 10 and then the test chart 10 is imaged.

<2> In the above-described embodiment, the position adjustment arm 14 having the suction cup shape lifts the camera module requiring adjustment once, and then the camera module is accommodated again in the accommodation portion 23 in which the camera module is accommodated. Although it is assumed that it is reinserted downward, this position adjustment method is an example, and is not limited to this method. For example, as shown in FIG. 2, if the housing portion 23 is formed in a tapered shape so that the inner diameter of the lower portion is narrower than the inner diameter of the upper portion, the position adjustment arm 14 simply needs to be adjusted camera module. May be adjusted correctly to the standard position by sliding the slope of the accommodating portion 23 having a tapered shape.

<3> In the above-described embodiment, after confirming that the camera module position adjustment unit 30 has correctly installed all the camera modules 3 accommodated in the tray 2 in the standard position, or correctly installed in the standard position. After the correction, the tray 2 is moved to the position where the test chart 10 can be imaged. However, the position adjustment and the imaging of the test chart 10 may be performed in parallel.

An example will be described with reference to FIG. In FIG. 11, it is assumed that the position is adjusted for each column and the test is performed for each column. First, the camera module position adjustment unit 30 confirms and adjusts the accommodation position of the camera module 3 related to a predetermined Bi row. Next, the tray 2 is moved by one row, and the object whose position is to be confirmed by the camera module position adjusting unit 30 is moved to the row A1 adjacent to the row Bi. At this time, the row B1 related to the foremost row is located above the test chart 10 (and below the test head 6) (the test chart 10 is not shown in FIG. 11). Then, the camera module position adjustment unit 30 confirms and adjusts the housing position of the camera module 3 related to the row A1, and in accordance with this, the electrode 51 and the contactor 7 on the back side of each camera module 3 related to the row B1 are electrically connected. Then, the test chart 10 is imaged. Hereinafter, the position adjustment and confirmation by the camera module position adjustment unit 30 and the imaging of the test chart 10 can be performed in parallel by moving the tray 2 one row at a time.

In the above case, the camera modules 3 in a plurality of rows may be simultaneously adjusted and confirmed, or the test chart 10 may be imaged by the camera modules 3 in a plurality of rows.

<4> In the above-described embodiment, the housing portion 23 has been described as having a tapered shape. However, the camera module 3 is placed in the housing portion by inserting one of the main surface side or the back surface side toward the housing portion 23. As long as it can be stably accommodated in the housing 23, the shape of the housing portion 23 is not limited. However, in view of the fact that the position can be adjusted by simple control that simply slides the slope, it is preferable that the housing portion 23 has a tapered shape as described above.

<5> In the above-described embodiment, the image test is performed for each column in the plurality of camera modules 3 arranged in a matrix in the tray 2, but the image test is performed for each column. It doesn't matter. If the transfer direction of the tray 2 is described as “column direction”, the image test may be performed for each row or for a plurality of rows at a time.

<6> In the above-described embodiment, the description has been made on the assumption that the lens 31 is mounted in the camera module 3. However, a configuration in which the lens 32 is mounted in the tray 2 may be employed (see FIG. 12). According to the tray 2 as shown in FIG. 12, an image test can be performed even in the camera module 3 in which the lens 31 is not incorporated.

<7> In the above-described embodiment, although not explicitly mentioned, the test chart 10 and the dust / stain test chart 5 may be provided with a light source required for imaging such as an LED. Further, even if the chart itself does not have a light source, it may be configured such that it can be imaged by the camera module 3 with an external light source.

<8> In the above-described embodiment, the test charts 10 are installed so that different test charts 10 are positioned within the viewing angle range of each camera module 3 for all the camera modules 3 belonging to the same column. In addition, the image test of the camera module 3 is performed for each column, but a part or all of the test charts 10 located within the viewing angle range of each camera module 3 are configured by the common test chart 10. It is good as a thing.

FIG. 13 is a diagram conceptually showing an embodiment in the case where one test chart 10 is located within the viewing angle range of a plurality of camera modules 3. In FIG. 13A, the test chart 10 is positioned at a time within the viewing angle range of each camera module 3 belonging to the same column, and the same test chart 10 is positioned within the viewing angle range of the two camera modules 3. Is configured to do. Even in such a case, the image test of each camera module 3 can be performed for each column.

Furthermore, an image test of each camera module 3 may be performed for each of a plurality of columns. FIG. 13B is a plan view showing the positional relationship between a certain test chart 10 and the camera module 3 (3a to 3d) including the test chart 10 in the viewing angle range. Areas Xa to Xd surrounded by dotted lines represent the viewing angle ranges of the camera modules 3a to 3d, respectively, in a plane. In the case of the configuration shown in FIG. 13, the test chart 10 is located within the viewing angle range of each of the camera modules 3a to 3d, and an image test of the camera module 3 for 2 rows and 2 columns can be performed using this test chart. It becomes. By arranging a plurality of such test charts 10 in a row, any one test chart 10 can be positioned at a time within the viewing angle range of the camera modules 3 for two rows. Thereby, the image test of each camera module 3 can be performed every two columns.

In the above, “every two columns” is merely an example, and by changing the positional relationship between one test chart 10 and each camera module 3 that fits the test chart 10 in the viewing angle range, three or more columns are used. The camera module 3 may be configured to be able to perform an image test.

Claims

A first tray provided with a plurality of accommodating portions having gaps penetrating in the insertion direction of the objects;
A test chart that can be imaged by the camera module housed in the housing section;
A contactor capable of contacting the electrode of the camera module formed on the back surface side opposite to the main surface side of the camera module facing the test chart;
An inspection unit electrically connected to the contactor and capable of analyzing an imaging result given from the camera module via the contactor;
In a state where a plurality of the camera modules are accommodated in the plurality of accommodating portions, respectively, at least one of the test charts is configured to be set within a viewing angle range of the plurality of the camera modules. To test equipment.
2. The test apparatus according to claim 1, wherein the test chart is configured to be installed below the first tray so that the camera module can capture images downward.
The plurality of camera modules are housed in the housing parts by being inserted into the housing parts with the main surface facing downward, respectively. Testing equipment.
One or a plurality of the test charts are present at a time within each viewing angle range of all the camera modules for one row or one column of the plurality of camera modules arranged in a matrix. The test apparatus according to claim 1, wherein the test chart is provided along a row direction or a column direction.
5. The first tray is configured to be movable in a column direction or a row direction after imaging of the test chart is completed by all the camera modules for one row or one column. The test equipment described.
A camera module position adjustment unit capable of adjusting the position of the camera module to a predetermined standard position in the housing unit;
Before the camera module images the test chart, the camera module position adjustment unit confirms the installation position of the camera module, and when the camera module is not installed at the standard position, the camera module is set to the standard position. The test apparatus according to claim 1, wherein the test apparatus is adjusted.
A second tray that can be superimposed on the first tray;
The camera module is detached from the first tray in the detaching direction after the second tray is placed on the surface of the first tray in the detaching direction opposite to the inserting direction. The test apparatus according to claim 1, wherein the module is configured to be accommodated in the second tray.
A lens is inserted in the gap,
The lens is positioned between the main surface side of the camera module and the test chart when the camera module is accommodated in the accommodating portion,
The test apparatus according to claim 1, wherein the test chart is configured to be able to image the test chart through the lens by a camera module housed in the housing portion.