Shielding box structure for light-blocking condition testing

Abstract

The utility model discloses a shielding box structure for light-shielding condition testing, comprising a shielding box base, a shielding box cover, a shielding box test bench and a connecting light-shielding structure; the shielding box test bench is arranged on the top surface of the shielding box base, the connecting light-shielding structure is arranged on the top surface of the shielding box base, the connecting light-shielding structure is an annular structure and is circumferentially arranged on the outside of the shielding box test bench; the shielding box cover is a cover structure with an opening at the lower end, the lower end of the shielding box cover is embedded in the connecting light-shielding structure, so that the shielding box cover covers the top surface of the shielding box base, and a completely light-shielding test space is formed between the shielding box cover and the shielding box base, and the shielding box test bench is located in the test space. The utility model relates to the technical field of chip testing equipment, and can solve the problem that the flip-cover shielding box in the prior art cannot completely isolate light.

Description

Technical Field

[0001] The utility model relates to the technical field of chip testing equipment, in particular to a shielding box structure used for light-isolating condition testing. Background Art

[0002] In the two-terminal and four-terminal Kelvin test experiments of some chips, it is necessary to conduct the test under darkroom conditions. The prior art shielding box includes a shell with a top opening and a cover body installed at the top opening of the shell in a flip-top manner. During the test, the tested device and the test machine are connected and tested under light-proof conditions in the shielding box.

[0003] Although the shielding box of the prior art can shield most of the light and achieve the purpose of light isolation, there is inevitably a gap between the cover and the shell, which causes light leakage in the test box, affecting the precision and accuracy of the test. Therefore, it is necessary to provide a shielding box structure for light isolation condition testing, which can solve the problem that the flip-cover shielding box in the prior art cannot completely isolate light. Summary of the invention

[0004] The utility model aims to provide a shielding box structure for light-isolating condition testing, which can solve the problem that the flip-cover shielding box in the prior art cannot completely isolate light.

[0005] The utility model is achieved in this way:

[0006] A shielding box structure for light-shielding condition testing comprises a shielding box base, a shielding box cover, a shielding box test bench and a connecting light-shielding structure; the shielding box test bench is arranged on the top surface of the shielding box base, the connecting light-shielding structure is arranged on the top surface of the shielding box base, the connecting light-shielding structure is an annular structure and is circumferentially arranged on the outside of the shielding box test bench; the shielding box cover is a cover structure with an opening at the lower end, the lower end of the shielding box cover is embedded in the connecting light-shielding structure, so that the shielding box cover covers the top surface of the shielding box base, and a completely light-shielding test space is formed between the shielding box cover and the shielding box base, and the shielding box test bench is located in the test space.

[0007] The cross section of the connecting light-shielding structure is a U-shaped structure with an open top, so that the lower end of the shielding box cover can be embedded in the U-shaped structure.

[0008] The width of the U-shaped structure is consistent with the wall thickness of the shielding box cover, so that the lower end of the shielding box cover can be matched and embedded in the U-shaped structure, and the inner walls on both sides of the U-shaped structure are respectively attached to the inner wall and outer wall of the shielding box cover.

[0009] A composite shielding layer consisting of an electroplating layer and an oxidation layer is formed on the inner wall and the outer wall of the shielding box cover.

[0010] A groove is formed on the top of the shielding box base, and the shielding box test bench is matched and embedded in the groove to form a sunken test bench.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The utility model is provided with a connecting light-shielding structure, and a concave opening is formed by utilizing the connecting light-shielding structure of the U-shaped structure, which is convenient for embedding the shielding box cover, so that the U-shaped structure effectively wraps the lower end of the shielding box cover, and ensures a complete light-shielding connection between the shielding box cover and the shielding box base, thereby providing darkroom experimental conditions for the test space, improving the accuracy and precision of the test results, and is suitable for test experiments such as light-shielding dark current measurement, light-shielding short-circuit resistance measurement, and electrostatic measurement; at the same time, the U-shaped structure also provides a limit for the shielding box cover, improves the installation reliability of the shielding box cover on the test box base, and is not easy to shift or loosen.

[0013] 2. The utility model is provided with a shielding composite layer, which can shield external electromagnetic interference through the shielding layer, thereby further ensuring the test precision and test accuracy of the tested piece in the test space, and can increase the service life of the shielding box cover.

[0014] 3. The utility model is provided with a shielding box test bench, which is installed in the shielding box base in a sunken manner, thereby ensuring that the test space can meet the requirements of placing and testing the tested device, the test machine, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic structural diagram of a shielding box structure used for light isolation condition testing.

[0016] In the figure, 1 is a shielding box base, 2 is a shielding box cover, 201 is a composite shielding layer, 3 is a shielding box test bench, and 4 is a connected light-shielding structure. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Please see attached Figure 1A shielding box structure for light-shielding condition testing comprises a shielding box base 1, a shielding box cover 2, a shielding box test bench 3 and a connecting light-shielding structure 4; the shielding box test bench 3 is arranged on the top surface of the shielding box base 1, the connecting light-shielding structure 4 is arranged on the top surface of the shielding box base 1, the connecting light-shielding structure 4 is an annular structure and is circumferentially arranged on the outside of the shielding box test bench 3; the shielding box cover 2 is a cover structure with an opening at the lower end, the lower end of the shielding box cover 2 is embedded in the connecting light-shielding structure 4, so that the shielding box cover 2 covers the top surface of the shielding box base 1, and a completely light-shielding test space is formed between the shielding box cover 2 and the shielding box base 1, and the shielding box test bench 3 is located in the test space.

[0019] The lower end of the shielding box cover 2 is embedded in the connecting light-shielding structure 4. The connecting light-shielding structure 4 wraps the lower end of the shielding box cover 2 to avoid a gap between the shielding box cover 2 and the shielding box base 1, thereby ensuring a complete light-shielding effect for the test space formed between the shielding box cover 2 and the shielding box base 1, which is beneficial to improving the test precision and accuracy.

[0020] The shielding box cover 2 is preferably a rectangular cover, and the connecting light-shielding structure 4 is a corresponding rectangular ring structure, thereby ensuring the integrity and effectiveness of the connecting light-shielding structure 4 wrapping the lower end of the shielding box cover 2 and playing a role in completely shielding from light.

[0021] The shielding box test bench 3 is arranged on the shielding box base 1 in the test space, so as to facilitate testing in a completely light-proof environment. The shielding box test bench 3 can be adaptively selected according to actual test requirements to meet the test requirements.

[0022] The cross section of the connecting light-shielding structure 4 is a U-shaped structure with an open top, so that the lower end of the shielding box cover 2 can be embedded in the U-shaped structure.

[0023] A concave structure is formed inside the U-shaped structure, which is convenient for positioning and plugging the lower end of the shielding box cover 2, and can also wrap the lower outer wall and lower inner wall of the shielding box cover 2, thereby ensuring a complete light-shielding effect between the shielding box cover 2 and the shielding box base 1, and further ensuring the formation of a darkroom test environment.

[0024] The width of the U-shaped structure is consistent with the wall thickness of the shielding box cover 2, or the width of the U-shaped structure is slightly larger than the wall thickness of the shielding box cover 2, so that the lower end of the shielding box cover 2 can be matched and embedded in the U-shaped structure, and the inner walls on both sides of the U-shaped structure are respectively fitted or roughly fitted on the inner wall and outer wall of the shielding box cover 2.

[0025] The width of the U-shaped structure is set according to the adaptability of the wall thickness of the shielding box cover 2, minimizing the gap between the inner wall of the U-shaped structure and the shielding box cover 2, thereby maximizing the light shielding effect in the test space, avoiding light leakage, and thus ensuring the test precision and accuracy.

[0026] At the same time, by fitting the inner walls on both sides of the U-shaped structure with the inner and outer walls of the shielding box cover 2, the shielding box cover 2 can be provided with lateral limitation, thereby improving the cover stability of the shielding box cover 2 on the shielding box base 1, and indirectly improving the test precision and accuracy.

[0027] A composite shielding layer 201 consisting of an electroplating layer and an oxide layer is formed on the inner wall and the outer wall of the shielding box cover 2 .

[0028] Preferably, the electroplating layer can be uniformly electroplated on the inner and outer wall surfaces of the shielding box cover 2 using existing metal electroplating technology. The electroplating layer can be formed using a metal material that can shield electromagnetic interference, which is beneficial for shielding external electromagnetic waves and avoiding external electromagnetic interference in the test process and affecting the test precision and accuracy.

[0029] Preferably, the oxide layer can form an oxide film on the inner and outer wall surfaces of the shielding box cover 2 using the surface oxidation treatment technology in the prior art, so as to improve the hardness, wear resistance, corrosion resistance and other properties of the shielding box cover 2, thereby extending the service life of the shielding box cover 2.

[0030] The top of the shielding box base 1 is formed with a groove, and the shielding box test bench 3 is matched and embedded in the groove to form a sunken test bench.

[0031] The thickness of the shielding box base 1 is greater than that of the shielding box test bench 3 to meet the sunken embedding of the shielding box test bench 3 and expand the test space formed between the shielding box base 1 and the shielding box cover 2 to facilitate various test experiments.

[0032] Please see attached Figure 1 , the usage method and working principle of the utility model are:

[0033] The shielding box base 1 is placed on the workbench, the device under test and the test machine are placed on the shielding box test bench 3, the shielding box cover 2 is covered on the shielding box base 1, and the lower end of the shielding box cover 2 is matched and plugged into the U-shaped structure connected to the light-shielding structure 4, and the lower end of the shielding box cover 2 is completely and effectively wrapped by the concave structure of the U-shaped structure, which has a 100% light-shielding effect and minimizes the influence of ambient light on the test accuracy.

[0034] In the test space formed between the shielding box cover 2 and the shielding box base 1, the test machine performs test experiments such as two-terminal and four-terminal Kelvin tests on the tested device to improve the test precision and accuracy.

[0035] During the test process, the composite shielding layer 201 can be used to isolate the external environment, reduce the interference of the external environment on the test process, improve the stability of the test environment, and further improve the precision and accuracy of the test.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shielding box structure for light isolation condition testing, characterized by: The invention comprises a shielding box base (1), a shielding box cover (2), a shielding box test bench (3) and a connecting light-shielding structure (4); the shielding box test bench (3) is arranged on the top surface of the shielding box base (1), the connecting light-shielding structure (4) is arranged on the top surface of the shielding box base (1), the connecting light-shielding structure (4) is an annular structure and is circumferentially arranged on the outside of the shielding box test bench (3); the shielding box cover (2) is a cover structure with an opening at the bottom, the lower end of the shielding box cover (2) is embedded in the connecting light-shielding structure (4), so that the shielding box cover (2) covers the top surface of the shielding box base (1), and a completely light-shielding test space is formed between the shielding box cover (2) and the shielding box base (1), and the shielding box test bench (3) is located in the test space.

2. The shielding box structure for light-shielding condition testing according to claim 1 is characterized in that: The cross section of the connecting light-shielding structure (4) is a U-shaped structure with an open top, so that the lower end of the shielding box cover (2) can be embedded in the U-shaped structure.

3. The shielding box structure for light-shielding condition testing according to claim 2 is characterized in that: The width of the U-shaped structure is consistent with the wall thickness of the shielding box cover (2), so that the lower end of the shielding box cover (2) can be matched and embedded in the U-shaped structure, and the inner walls on both sides of the U-shaped structure are respectively fitted on the inner wall and outer wall of the shielding box cover (2).

4. The shielding box structure for light-shielding condition testing according to any one of claims 1 to 3, characterized in that: A composite shielding layer (201) consisting of an electroplating layer and an oxidation layer is formed on the inner wall and the outer wall of the shielding box cover (2).

5. The shielding box structure for light-shielding condition testing according to claim 1 is characterized in that: A groove is formed on the top of the shielding box base (1), and the shielding box test bench (3) is matched and embedded in the groove to form a sunken test bench.

Images