KR101659589B1 - Leak test apparatus and method for electronic product - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a leak test apparatus and method of an electronic product that can perform a leak test such as airtightness performance, waterproof performance, leakage performance, and the like of various electronic products such as mobile phones. A chamber installed in the frame and having a receiving space formed therein to receive the electronic product; A pressure medium supply unit for supplying a pressure medium into the chamber so that an initial pressure is formed inside the chamber; A pressure sensor for measuring a pressure inside the chamber; And a control unit which can display the pressure change value inside the chamber so as to identify the defective product by checking the degree of penetration of the pressure medium into the electronic product.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leak test apparatus and method for electronic products,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a leak testing apparatus and method for an electronic product, and more particularly, to a leak testing apparatus and method of an electronic product that can perform a leak test such as airtight performance, waterproof performance, And methods.

In general, various mobile electronic devices such as mobile phones, mobile phones, smart phones, and smart pads may be exposed to harsh environments where various moisture and moisture can easily penetrate into the product.

When the moisture or moisture permeates into the interior of the electronic product, not only the electronic components sensitive to moisture or moisture easily corrode or oxidize to deteriorate the durability of the product, but also short-circuit phenomenon due to moisture or moisture, Various fatal errors in electronic products such as electric shock phenomenon and various malfunction phenomenon may occur.

Therefore, conventionally, various kinds of sealing members and sealing materials have been installed in the case and part clearance of the electronic product to perform various airtightness and waterproofing processes for preventing penetration of moisture and moisture from the outside.

However, the airtightness performance of the waterproofed electronic product, that is, the waterproof performance, can not be visually confirmed easily, and when the electronic product is actually immersed in water for testing, in the case of defective products permeating moisture or moisture into the product, Once moisture or moisture penetrated it, it was difficult to repair it, so the product had to be discarded.

Therefore, conventionally, it has been very difficult to select good products and defective products by precisely measuring the penetration of moisture or moisture penetration into electronic products, and it has been difficult to dispose of defective products after the test there was.

Disclosure of Invention Technical Problem [7] Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to accurately and numerically measure whether or not penetration of moisture or moisture penetrates into electronic products to quickly and accurately discriminate good products and defective products And it is an object of the present invention to provide a leak test apparatus and method of an electronic product that can detect and remedy the cause of a defect even if it is judged to be a defective product in the test because the actual moisture and moisture are not infiltrated during the test process . However, these problems are exemplary and do not limit the scope of the present invention.

According to an aspect of the present invention, there is provided a leak test apparatus for an electronic product, including: a frame; A chamber installed in the frame and having a receiving space formed therein to receive the electronic product; A pressure medium supply unit for supplying a pressure medium into the chamber so that an initial pressure is formed inside the chamber; A pressure sensor for measuring a pressure inside the chamber; And a control unit which can display the pressure change value inside the chamber so as to identify the defective product by checking the degree of penetration of the pressure medium into the electronic product.

The leak test apparatus of an electronic product according to an embodiment of the present invention may be configured to precisely change a volume of a pressure forming space in which a pressure is formed inside the chamber so that the initial pressure inside the chamber can be finely adjusted And a volume controller for controlling the volume of the fluid.

According to an aspect of the present invention, the volume controller is connected to a pressure forming space inside the chamber, a volume control chamber is formed therein, and a piston capable of moving forward and backward to change the volume of the volume control chamber is installed A volume control cylinder; And a volume adjusting screw which is installed on the volume adjusting cylinder so as to be capable of screwing and which is brought into contact with the piston to press the piston and is screwed back and forth by an operator or a volume adjusting actuator.

According to an aspect of the present invention, the pressure medium supply unit may include a pressure medium accommodating space formed therein to supply a pressure medium inside the chamber, and a piston capable of reciprocating to form a supply pressure in the pressure medium accommodating space Pressure medium supply cylinder installed; A pressure medium supply actuator connected to the piston to move the piston back and forth to press the piston; A pressure medium supply line provided between the pressure medium supply cylinder and the chamber; A first valve installed in the pressure medium supply line; A discharge line installed in the pressure medium supply line or the chamber, for discharging air or the pressure medium inside the chamber to the outside; And a second valve installed in the discharge line.

According to an aspect of the present invention, the chamber further includes: a stationary chamber fixed to the frame; And a movable chamber moving forward and backward in the direction of the fixed chamber by a chamber moving actuator along a guide member provided on the frame so as to be able to be engaged with the fixed chamber.

According to an aspect of the present invention, the control unit may display, on the display, the initial pressure within the chamber measured by the pressure sensor and the pressure change value of the end pressure during the test period. When the pressure change value is out of the reference value It may be determined to be defective and a failure determination signal may be output.

According to an aspect of the present invention, there is provided a leak testing method for an electronic product, the method comprising: a waiting step of receiving an electronic product in a chamber and maintaining the inside of the chamber at atmospheric pressure; A pressure medium supply step of supplying a pressure medium to the inside of the chamber using a pressure medium supply unit so as to form an initial pressure inside the chamber after sealing the inside of the chamber with outside air; And an initial pressure inside the chamber measured by the pressure sensor and a pressure of a final pressure during a test period so that the degree of penetration of the pressure medium into the electronic product can be checked using a pressure sensor measuring a pressure inside the chamber. And a pressure test step of confirming the change value.

According to still another aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: a volume adjusting step of precisely changing a volume of a pressure forming space in which a pressure is formed inside the chamber so that an initial pressure inside the chamber can be precisely adjusted before the pressure testing step; As shown in FIG.

According to some embodiments of the present invention as described above, it is possible to quickly and accurately discriminate good products and defective products by precisely numerically measuring penetration using air, thereby improving the reliability of the test, And the cost can be greatly increased to increase the productivity. Since the air is penetrated without penetrating the actual moisture or moisture during the test process, even if it is judged as a defective product in the test, it is possible to find out the cause of defective and repair, . Of course, the scope of the present invention is not limited by these effects.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a part assembly perspective view showing a leak test apparatus of an electronic product according to some embodiments of the present invention. FIG.
Fig. 2 is an exploded perspective view of a component of the leak test apparatus of Fig. 1; Fig.
Fig. 3 is a perspective view showing an example of a fixed chamber of the leak test apparatus of the electronic product of Fig. 2;
4 is a cross-sectional view showing an example of a volume controller of the leak test apparatus of the electronic product of Fig. 3;
Fig. 5 is a pneumatic circuit diagram schematically showing the pneumatic action of the leak test apparatus of the electronic product of Fig. 1; Fig.
Figure 6 is a flow diagram illustrating a method of leak testing an electronic product in accordance with some embodiments of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified in various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

It is to be understood that throughout the specification, when an element such as a film, region or substrate is referred to as being "on", "connected to", "laminated" or "coupled to" another element, It will be appreciated that elements may be directly "on", "connected", "laminated" or "coupled" to another element, or there may be other elements intervening therebetween. On the other hand, when one element is referred to as being "directly on", "directly connected", or "directly coupled" to another element, it is interpreted that there are no other components intervening therebetween do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "under" or "below" can be used herein to describe the relationship of certain elements to other elements as illustrated in the Figures. Relative terms are intended to include different orientations of the device in addition to those depicted in the Figures. For example, if the element is inverted in the figures, the elements depicted as being on the upper surface of the other elements will have a direction on the lower surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure. If the elements are oriented in different directions (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention should not be construed as limited to the particular shapes of the regions illustrated herein, but should include, for example, changes in shape resulting from manufacturing.

1 is a part assembly perspective view showing a leak test apparatus 100 of an electronic product according to some embodiments of the present invention. 3 is a perspective view showing an example of the fixed chamber 21 of the leak test apparatus 100 of the electronic product of Fig. 2; Fig. And Fig. 4 is a sectional view showing an example of a volume controller of the leak test apparatus of the electronic product of Fig.

First, as shown in FIGS. 1 to 4, an electronic product leak test apparatus 100 according to some embodiments of the present invention includes a frame 10, a chamber 20, a pressure medium supply unit 30, a pressure sensor 40, a control unit 50, and a volume controller 60.

Herein, the frame 10 may be formed by the apparatuses such as the chamber 20, the pressure medium supply unit 30, the pressure sensor 40, the control unit 50 and the volume controller 60 And can have various brackets, horizontal and vertical members, fixing members, and fixing members.

The shape and the type of the frame 10 are not limited to the drawings, and a wide variety of shapes and types of frames can be applied.

2 and 3, the chamber 20 is installed in the frame 10 and can be used for various mobile electronic devices such as a mobile phone, a mobile phone, a smart phone, or a smart pad, And may be a structure in which a receiving space is formed so as to accommodate various electronic products such as an electronic product requiring a function.

2 and 3, the chamber 20 includes a fixed chamber 21 fixed to the frame 10 and a movable chamber 21 fixed to the fixed chamber 21 to be engaged with the fixed chamber 21. [ And a movable chamber 22 which is moved back and forth in the direction of the fixed chamber 21 by a chamber movable actuator 23 along a guide member G provided on the movable body 10.

3, the fixed chamber 21 is installed below the movable chamber 22, and the upper surface of the fixed chamber 21 is opened upward to accommodate various electronic products, and a receiving space is formed therein A plurality of pressure chambers R1 and R2 may be formed.

3, a pressure medium inlet H may be formed at the bottom center of the pressure chambers R1 and R2.

2, the movable chamber 22 is installed above the fixed chamber 21 and is adapted to seal the pressure chambers R1 and R2 of the fixed chamber 21 Or the like.

Although not shown, a sealing member such as an O-ring or a gasket for sealing the pressure chambers R1 and R2 may be provided on the lower surface of the movable chamber 22. [

The guide member G may be a vertical guide rail for guiding guide blocks installed on both sides of the movable chamber 22 so as to guide the movable chamber 22 up and down.

The shapes and types of the fixed chamber 21, the movable chamber 22, and the guide member G are not limited to those shown in the drawings, and chambers and guide devices of various shapes and types can be applied .

Therefore, when the operator loads the electronic product into the pressure chambers R1 and R2 and then the movable chamber 22 is lowered in the direction of the fixed chamber 21 and is fastened to each other, The pressure chambers R1 and R2 of the fixed chamber 21 can be closed and the pressure chambers R1 and R2 can be closed through the pressure medium inlet H formed at the center of the bottom of each of the pressure chambers R1 and R2, A pressure environment suitable for testing in the pressure chambers R1 and R2 can be formed while uniformly propagating the pressure medium from the center of the pressure chambers R1 and R2.

1 and 2, the pressure medium supply unit 30 is a device for supplying a pressure medium to the interior of the chamber 20 so as to form an initial pressure inside the chamber 20 .

Here, the pressure medium may be air, nitrogen gas, argon gas or various inert gases.

5 is a pneumatic circuit diagram schematically showing the pneumatic action of the leak test apparatus 100 of the electronic product of Fig.

2 and 5, the pressure medium supply unit 30 includes a pressure medium supply cylinder 31, a pressure medium supply actuator 33, a pressure medium supply line (not shown) L1, a first valve V1, a discharge line L2, a second valve V2, and a pressure filter F, as shown in FIG.

2 and 5, the pressure medium supply cylinder 31 has a pressure medium accommodating space formed therein so as to supply a pressure medium inside the chamber 20, And a piston 32 capable of moving forward and backward to form a supply pressure. The pressure medium supply cylinder 31 is capable of intermittently supplying the pressure medium into the chamber 20 while advancing the piston 32 one time, The pressure medium can be intermittently supplied to the inside of the pressure chamber 20. To this end, the pressure medium supply cylinder 31 may be additionally provided with a one-way check valve or various other pneumatic devices.

2 and 5, the pressure medium supply actuator 33 is connected to the piston 32 to move the piston 32 forward and backward and presses the piston 32. As shown in FIGS. 2 and 5, Various kinds of gear combination, various link combination, various thread bar combination, various kinds of belt and pulley combination as well as driving source for generating driving force such as various pneumatic cylinders, hydraulic cylinders, motors, linear motors, various motors, internal combustion engines, A variety of chains, sprocket wheel combinations, various types of wire and pulley combinations, and the like.

5, the pressure medium supply line L1 is provided between the pressure medium supply cylinder 31 and the chamber 20, and the pressure medium L1 is supplied to the chamber 20, Or a connecting line such as a duct, a tube, or a flexible tube.

5, the first valve V1 may be provided on the pressure medium supply line L1 to control the flow of the pressure medium flowing along the pressure medium supply line L1 And the like.

5, the discharge line L2 is provided in the pressure medium supply line L1 or the chamber 20, and the air in the chamber 20 or the pressure medium is discharged to the outside A pipe, a duct, a tube, a flexible pipe, or the like.

5, the second valve V2 may include various valves installed in the discharge line L2 and capable of interrupting the flow of the pressure medium discharged along the discharge line L2, Lt; / RTI >

5, the pressure filter F may be provided in the pressure medium supply line L1 or the discharge line (not shown) so as to prevent adverse effects caused by various foreign substances or pressure gradients into the interior of the chamber 20. [ L2), or a pneumatic filter that can be connected to the chamber 20.

In addition, although not shown, various kinds of pneumatic devices such as various reservoirs, check valves, pressure medium storage tanks, and pumps may be additionally installed in the chamber 20.

2 and 5, the pressure sensor 40 is a sensor capable of measuring a pressure inside the chamber 20 and outputting a pressure signal. For example, the pressure of the liquid or the gas An apparatus and an element for detecting and transmitting an electric signal that is easy to use for measurement and control, and a pressure transducer and a sensor of the same concept in a broad sense. Here, the pressure sensor 40 can be applied to a large number of types, such as using a thermal conductivity of molecular density including displacement or deformation as a principle of measurement.

1 and 2, the controller 50 controls the pressure inside the chamber 20 so as to determine the degree of penetration of the pressure medium into the electronic product, A microprocessor, a semiconductor device, and various control devices that may include a circuit or a program.

The control unit 50 may display the initial pressure within the chamber 20 measured by the pressure sensor 40 and the pressure change of the end pressure during the test period as a display D, If the value is out of the reference value, it is judged to be defective and a defective judgment signal, a light signal and a verb signal can be outputted.

5, for example, after the electronic product is loaded in the chamber 20, the movable chamber 22 is closed so that no positive pressure is formed in the fixed chamber 21, When the first valve (V1) and the second valve (V2) are both opened and the internal pressure of the electronic product is sufficiently stabilized to the atmospheric pressure after the sensing pressure is stabilized, that is, The pressure medium supply actuator 33 advances the piston 32 of the pressure medium supply cylinder 31 to open the second valve V2 in the pressure medium accommodating space by opening the first valve V1 and closing the second valve V2, A pressure medium may be supplied to the chamber 20 through the pressure medium supply line L1.

Thereafter, the first valve (V1) is closed to maintain the initial pressure inside the chamber (20) when a predetermined initial pressure, for example, 10 kPa, is formed in the chamber (20) The pressure of the inside of the chamber 20 may be measured using the pressure sensor 40 and checked by a graph or a digital value.

At this time, it can be judged as a good product if it is within the reference range and can be judged as a defective product if it deviates from the reference range by comparing with the pressure change value and the pressure reference value or the pressure fluctuation rate reference value.

Thereafter, when the test is completed, both the first valve (V1) and the second valve (V2) are opened to discharge the pressure medium in the chamber (20) to the outside, and the chamber The electronic product can be unloaded.

1 to 4, the volume controller 60 precisely changes the volume of the pressure forming space in which the pressure is formed in the chamber 20, And may be installed in the chamber 20 so as to communicate with the chamber 20 so as to finely control the initial pressure.

More specifically, for example, the volume adjuster 60 may include a volume adjusting cylinder 61 and a volume adjusting screw 63.

The volume control cylinder 61 is connected to the pressure forming space inside the chamber 20 and has a volume control chamber R formed therein to change the volume of the volume control chamber R And a piston 62 capable of moving back and forth with a restoring force by an elastic spring 64 is provided.

The volume adjusting screw 63 is screwed to the volume adjusting cylinder 61 and is brought into contact with the piston 62 so as to press the piston 62 so as to be pressed by the operator or the volume adjusting actuator It may be an adjusting screw that screws forward and backward.

Therefore, when the volume adjusting screw 63 is screwed, the volume of the volume adjusting chamber R can be finely reduced while the piston 62 in contact with the screw 62 advances. Conversely, when the volume adjusting screw 63 The volume of the volume control chamber R may be slightly increased while the piston 62 in contact with the piston 62 is moved backward.

Therefore, it is possible to quickly and accurately discriminate good products and defective products by precisely measuring the penetration of moisture or moisture penetration into the inside of the electronic product using air as a pressure medium instead of actual moisture or moisture, This improves the reliability of the test, reduces test time and costs, and can greatly increase productivity.

In addition, since the actual moisture or moisture is not penetrated during the test process and air is penetrated, even if it is judged as a defective product in the test, it is possible to find out the cause of the defect and repair or restore it.

1 to 5, the operation of the leak test apparatus 100 of an electronic product according to some embodiments of the present invention will be described in more detail. First, an electronic product is placed inside the chamber 20 And maintain the inside of the chamber 20 at atmospheric pressure.

Subsequently, a pressure medium can be supplied to the inside of the chamber 20 by using a pressure medium supply part 30 so that an initial pressure is formed inside the chamber 20 after the inside of the chamber 20 is sealed with outside air. have.

The volume of the pressure forming space in which the pressure is formed in the chamber 20 can be precisely changed so that the initial pressure inside the chamber 20 can be precisely controlled.

The pressure of the pressure medium 40 is measured by the pressure sensor 40 so that the degree of penetration of the pressure medium into the electronic product can be checked using a pressure sensor 40 for measuring the pressure inside the chamber 20. [ ) And the pressure change of the end pressure during the test period.

Figure 6 is a flow diagram illustrating a method of leak testing an electronic product in accordance with some embodiments of the present invention.

1 to 6, a method for testing a leak of an electronic product according to some embodiments of the present invention includes the steps of accommodating an electronic product inside a chamber 20, placing the inside of the chamber 20 at atmospheric pressure And a pressure medium supply unit 30 is provided in the chamber 20 so as to form an initial pressure inside the chamber 20 after the inside of the chamber 20 is sealed with outside air, A pressure medium supply step S2 for supplying a pressure medium to the inside of the chamber 20 and a pressure sensor 40 for measuring a pressure inside the chamber 20 may be used to check the degree of penetration of the pressure medium into the electronic product And a pressure test step S4 of confirming the initial pressure inside the chamber 20 measured by the pressure sensor 40 and the pressure change value of the end pressure during the test period.

Here, before the pressure test step (S4), a volume adjustment that precisely changes the volume of the pressure forming space in which the pressure is formed in the chamber (20) so that the initial pressure inside the chamber (20) And may further comprise step S3.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: frame
20: chamber
21: Fixed chamber
22: movable chamber
30: pressure medium supply unit
31: Pressure medium supply cylinder
32: Piston
33: Pressure medium supply actuator
40: Pressure sensor
50:
60: volume controller
61: volume control cylinder
62: Piston
63: Volume adjusting screw
64: Elastic spring
D: Display
R: Volume control room
L1: pressure medium supply line
L2: exhaust line
V1: first valve
V2: second valve
F: Pressure filter
G: Guide member
R1, R2: Pressure chamber
H: pressure medium inlet
100: Leak test device of electronic products

Claims (8)

frame;
A chamber installed in the frame and having a receiving space formed therein to receive the electronic product;
A pressure medium supply unit for supplying a pressure medium into the chamber so that an initial pressure is formed inside the chamber;
A pressure sensor for measuring a pressure inside the chamber;
A control unit which can display a pressure change value inside the chamber so as to identify a defective product by confirming the degree of penetration of the pressure medium into the electronic product; And
A volume adjuster installed in the chamber to finely adjust the initial pressure inside the chamber by precisely varying the volume of the pressure forming space in which the pressure is formed inside the chamber;
Lt; / RTI >
The volume controller includes:
A volume control cylinder connected to the pressure forming space inside the chamber, having a volume control chamber formed therein, and a piston capable of moving forward and backward to change a volume of the volume control chamber; And
A volumetric adjustment screw threadably mounted on the volume control cylinder and brought into contact with the piston to pressurize the piston and advanced or retracted by an operator or volume control actuator;
Lt; / RTI >
The volume control cylinder may include: an elastic spring to which a restoring force acts to change the volume of the volume control chamber;
Of the electronic device. delete delete The method according to claim 1,
Wherein the pressure-
A pressure medium supply cylinder in which a pressure medium accommodating space is formed so as to supply a pressure medium in the chamber and a piston capable of moving forward and backward so that a supply pressure is formed in the pressure medium accommodating space;
A pressure medium supply actuator connected to the piston to move the piston back and forth to press the piston;
A pressure medium supply line provided between the pressure medium supply cylinder and the chamber;
A first valve installed in the pressure medium supply line;
A discharge line installed in the pressure medium supply line or the chamber, for discharging air or the pressure medium inside the chamber to the outside; And
A second valve installed in the discharge line;
Of the electronic device. The method according to claim 1,
The chamber may comprise:
A fixed chamber fixed to the frame; And
A movable chamber which is moved back and forth in the direction of the fixed chamber by a chamber movable actuator along a guide member provided on the frame so as to be able to be engaged with the fixed chamber;
Of the electronic device. The method according to claim 1,
Wherein,
Wherein a pressure change value of the initial pressure inside the chamber measured at the pressure sensor and a pressure change value of a terminal pressure at the end of the test period is displayed on the display and a bad determination signal is output when the pressure change value is out of the reference value, Leak test device of electronic products. A waiting step of receiving the electronic product inside the chamber and keeping the inside of the chamber at atmospheric pressure;
A pressure medium supply step of supplying a pressure medium to the inside of the chamber using a pressure medium supply unit so as to form an initial pressure inside the chamber after sealing the inside of the chamber with outside air; And
A pressure sensor for measuring an internal pressure of the chamber is used to check an initial pressure inside the chamber measured by the pressure sensor and a pressure change of a final pressure during a test period so that the degree of penetration of the pressure medium into the electronic product can be checked, A pressure test step of confirming the value;
Lt; / RTI >
Prior to the pressure testing step,
A volume adjusting step of accurately changing the volume of the pressure forming space in which the pressure is formed inside the chamber so as to precisely adjust the initial pressure inside the chamber using the rotation of the volume adjusting screw and the restoring force of the elastic spring;
Further comprising the step of testing the leakage of the electronic product.
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