CN114486080A - Anti-frosting universal heat flow instrument sealing test conversion tool - Google Patents
Anti-frosting universal heat flow instrument sealing test conversion tool Download PDFInfo
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- CN114486080A CN114486080A CN202111601102.5A CN202111601102A CN114486080A CN 114486080 A CN114486080 A CN 114486080A CN 202111601102 A CN202111601102 A CN 202111601102A CN 114486080 A CN114486080 A CN 114486080A
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- 238000012360 testing method Methods 0.000 title claims abstract description 87
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 43
- 238000007789 sealing Methods 0.000 title claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000741 silica gel Substances 0.000 claims abstract description 36
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 36
- 230000000694 effects Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- General Physics & Mathematics (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to an anti-frosting general-purpose heat flow instrument sealing test conversion tool which comprises a hard cylindrical shell, an adjustable clamp, a soft funnel-shaped temperature-resistant silica gel and a tower-shaped return interface with a skirt edge, wherein the soft funnel-shaped temperature-resistant silica gel is used for wrapping an air outlet of a heat flow instrument and is connected with the tower-shaped return interface with the skirt edge; sleeving the soft funnel type temperature-resistant silica gel into the hard cylindrical shell, and adjusting the soft funnel type temperature-resistant silica gel to a proper position by using an adjustable clamp to be fastened and installed; selecting test DUT plates with different sizes, selecting tower-shaped return interfaces with corresponding specifications, connecting the tower-shaped return interfaces with the skirt edges with the air outlets of the heat flow meters, and gathering the heat flow meters in the central space above the integrated circuit to be tested of the test DUT plates; and a testing machine table is placed at the skirt edge at the bottom of the conversion tool. The invention reduces the quality risk of the integrated circuit that the repeated operation of high and low temperature test and the connectivity are not excessive to cause the power supply current abnormity, and improves the scientific research production efficiency by more than 30 percent.
Description
Technical Field
The invention relates to an anti-frosting universal type heat flow instrument sealing test conversion tool, and belongs to the technical field of electrical property test.
Background
The electrical performance test of integrated circuit is one of the key links in reliability screening test, and the electrical performance test is divided into normal temperature
The test, the low temperature (-55 +/-3 ℃) test, the high temperature (125 +/-3 ℃) test and the like are called as the three-temperature test for short, and the temperature is military temperature grade. The normal temperature test is to place the integrated circuit directly in the test board to run the test program, while the traditional high and low temperature test is to place the integrated circuit in the temperature test box with set temperature value, place for a certain time according to the regulation to make the junction temperature of the internal PN junction of the tested integrated circuit reach the specified value, and then take the tested integrated circuit out of the temperature test box to run the test program in the test board with the test equipment to perform the high and low temperature test.
The key of the three-temperature test of the integrated circuit is how to ensure that the temperature applied to the surface of the shell of the tested integrated circuit (hereinafter referred to as the shell temperature) is within the range allowed by the specified value.
The main disadvantages of the existing testing method are as follows: firstly, the manual operation, the time of operation is difficult to control. The iron tweezers for clamping the integrated circuit easily touch the pins of the integrated circuit, resulting in the increase of the time for clamping the integrated circuit. Secondly, the temperature change of the integrated circuit is large after the integrated circuit is taken out from the high-low test box, and the temperature of the integrated circuit shell can not meet the requirements of test conditions. Therefore, the traditional high-low temperature test operation mode of the integrated circuit is difficult to accurately control the shell temperature of the tested integrated circuit.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the anti-frosting universal type heat flow instrument sealing test conversion tool is provided, the problems that manual operation time is not easy to control, secondary damage of an integrated circuit and insufficient validity of the shell temperature of the integrated circuit are solved by adopting an adjustable integrated sealing conversion tool scheme, the phenomena of low-temperature frosting and high-temperature air leakage during high-low temperature test of the integrated circuit are avoided, the quality risk that repeated operation of high-low temperature test of the integrated circuit is reduced, the connectivity does not cause power supply current abnormity is reduced, and the scientific research production efficiency is improved by more than 30%.
The technical scheme of the invention is as follows:
a frost-proof universal heat flow instrument sealing test conversion tool comprises a rigid cylindrical shell, an adjustable clamp, a soft funnel type temperature-resistant silica gel and a tower-shaped return interface with a skirt edge,
the soft funnel-shaped temperature-resistant silica gel is used for wrapping the air outlet of the heat flow instrument and is connected with the tower-shaped return interface with the skirt edge; sleeving the soft funnel type temperature-resistant silica gel into the hard cylindrical shell, and adjusting the soft funnel type temperature-resistant silica gel to a proper position by using an adjustable clamp to be fastened and installed; selecting test DUT plates with different sizes, selecting tower-shaped return interfaces with corresponding specifications, connecting the tower-shaped return interfaces with the skirt edges with the air outlets of the heat flow meters, and gathering the heat flow meters in the central space above the integrated circuit to be tested of the test DUT plates; a testing machine table is placed on the skirt edge at the bottom of the conversion tool;
the skirt edge with the skirt edge tower-shaped return connector is provided with air holes, so that low-temperature frosting and high-temperature air leakage are prevented.
Furthermore, the adjustable clamp is adjusted to a proper position 2-3 cm away from the lower edge of the air outlet of the heat flow meter equipment.
Furthermore, the tower-shaped return interfaces with the skirt edges are adjustable multi-group return interfaces, the return interfaces are arranged to be tower-shaped inverted cone structures, the cone interfaces with different sizes enable the conversion tool to meet the requirements of testing DUT boards with different sizes, the high-temperature-resistant silica gel interfaces are selected for use in the high-temperature 125 ℃ test, and the silica gel interfaces with the tensile strength larger than 5.0 are selected for use in the low-temperature-55 ℃ test.
Furthermore, the hard cylindrical shell and the soft funnel-type temperature-resistant silica gel of the conversion tool are arranged into double layers, and the set temperature is effectively controlled within an allowable range.
Furthermore, the test temperature of the double-layer hard cylindrical shell and the soft funnel type temperature-resistant silica gel is controlled to change within a range of +/-3 ℃.
Furthermore, the rigid cylindrical shell and the soft funnel type temperature-resistant silica gel are locked through the adjustable clamp, so that a sealed space is formed in the central space above the integrated circuit to be tested, the air isolation effect is achieved, the constant temperature of the central space above the integrated circuit to be tested is kept, and the effect of effectively controlling the temperature is achieved.
Furthermore, 4 air holes with the aperture of 0.4-0.6cm are uniformly distributed at 4 positions 4-6cm away from the edge of the skirt edge, and the air holes are adsorbed on the surface of the DUT plate at the moment of starting the heat flow meter, so that a good closed space is obtained.
Compared with the prior art, the invention has the beneficial effects that:
(1) the conversion tool is designed to be an adjustable integrated structure, the soft and hard components of the conversion tool are hermetically mounted through the clamp, the soft and hard components are of a double-layer structure, the mounting matching condition of the conversion tool and the heat flow instrument equipment is observed through the hard cylindrical shell, and the double-layer soft and hard components play a role in isolating air;
(2) according to the invention, a high-temperature-resistant silica gel interface is selected when a high-temperature 125 ℃ (conventional army temperature level) test is carried out, and a silica gel interface with tensile strength larger than 5.0 is selected when a low-temperature-55 ℃ (conventional army temperature level) test is carried out, so that the conversion tool meets the test requirements of different temperatures and can cover the reliability screening test requirements of the integrated circuit;
(3) the invention meets the compatibility requirements of the DUT boards with different specifications and sizes, and realizes the high-low temperature test requirements of the integrated circuits of the DUT boards with different specifications and sizes by selecting the sizes of different rectangular cone interfaces, thereby improving the application coverage rate of the conversion tool;
(4) the invention enables the conversion tool to create a closed test space through integrated molding, plays a role of isolating the external environment on the whole, has the functions of stable temperature, no frosting at low temperature and no air leakage at high temperature, and has the advantages of high adjustability, full coverage rate, good sealing property, excellent heat insulation property, good contact property and the like.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The invention is further illustrated by the following examples.
A frost-proof universal heat flow instrument sealing test conversion tool comprises a rigid cylindrical shell, an adjustable clamp, a soft funnel type temperature-resistant silica gel and a tower-shaped return interface with a skirt edge as shown in figure 1,
the soft funnel-shaped temperature-resistant silica gel is used for wrapping the air outlet of the heat flow instrument and is connected with the tower-shaped return interface with the skirt edge; sleeving the soft funnel type temperature-resistant silica gel into the hard cylindrical shell, adjusting the soft funnel type temperature-resistant silica gel to be 2-3 cm away from the lower edge of an air outlet of the heat flow instrument equipment by using an adjustable clamp, and fastening; according to the method, test DUT plates with different sizes are selected, tower-shaped return interfaces with corresponding specifications and skirt edges are selected, the adjustable multi-group return interfaces can realize the compatible use of the DUT plates with different specifications and sizes, the return interfaces are arranged to be tower-shaped inverted cone structures, the cone interfaces with different sizes enable a conversion tool to meet the requirements of the test DUT plates with different sizes, a high-temperature-resistant silica gel interface is selected during high-temperature 125 ℃ (conventional army temperature level) test, a silica gel interface with tensile strength larger than 5.0 is selected during low-temperature-55 ℃ (conventional army temperature level) test, and the tower-shaped return interfaces with the skirt edges are connected with a gas outlet of a heat flow meter and gathered in a central space above an integrated circuit to be tested of the test DUT plates; flatly placing a testing machine on the skirt edge at the bottom of the conversion tool;
the conversion tool is soft and hard and is arranged into a double layer, and the set temperature is effectively controlled within an allowable range; the structure characteristics of combining thermal current appearance equipment gas outlet, the compound material of rigid double-deck white high temperature resistant perspective is selected for use to the cylinder casing of converting the frock, be convenient for observe the assembly of converting the frock and thermal current appearance equipment, soft silica gel also sets up to bilayer structure, the experimental temperature of double-deck soft and rigid material control changes in 3 ℃ within range, this temperature control requirement that also accords with the test condition, soft and rigid material pass through the clamp locking, make integrated circuit top central space that awaits measuring form sealed space, play the effect of isolated air, make integrated circuit top central space that awaits measuring keep the constant temperature, thereby reach the effect of effective control temperature.
The conversion tool part is temperature resistant, and the skirt edge is provided with the air holes, so that the phenomena of low-temperature frosting and high-temperature air leakage are avoided. The conversion tool is special in application environment, so that a high-temperature-resistant silica gel interface is selected when a high-temperature 125 ℃ (conventional army temperature level) test is carried out, a silica gel interface with the tensile strength larger than 5.0 is selected when a low-temperature-55 ℃ (conventional army temperature level) test is carried out, 4 air holes with the aperture of 0.5cm are uniformly distributed at 4 positions 5cm away from the edge of the skirt edge, the air holes are key components for keeping the skirt edge and the surface of a DUT board in sealing contact, and the air holes are adsorbed on the surface of the DUT board to obtain a good closed space by utilizing a negative pressure principle at the moment of starting a heat flow meter, so that the problems of low-temperature frosting and high-temperature air leakage during the high-low temperature test of the integrated circuit are solved.
The invention tests the working principle:
firstly, setting a test computer and a test program, then selecting a correct test DUT board and assembling test hardware, then loading an integrated circuit to be tested into the test DUT board, then sleeving a soft funnel-shaped temperature-resistant silica gel into a hard cylindrical shell, adjusting the shell to an installation position by an adjustable clamp, fastening the shell, selecting a proper clip interface according to the size of the DUT board and connecting an air outlet of a thermoflowmeter device, flatly placing a bottom skirt edge of a conversion tool on the surface of the test DUT board, enabling the skirt edge to be adsorbed on the surface of the test DUT board by using a negative pressure principle at the moment of starting the thermoflowmeter to obtain a good closed space, keeping 180 seconds after the air outlet temperature of the thermoflowmeter reaches a set temperature, then operating the high-low temperature test program of the integrated circuit for testing, and exhausting and relieving pressure by using the air vent after testing is finished so that the internal pressure of the conversion tool is balanced with the atmospheric pressure, and clicking a heat flow instrument air outlet lifting button to lift the heat flow instrument air outlet with the conversion tool, then loading the next 1 integrated circuit to be tested into the test DUT board, repeating the steps to complete the high and low temperature test of the integrated circuit, and circularly reciprocating to complete the high and low temperature test service of all integrated circuits to be tested by using the conversion tool.
The conversion tool is designed to be an adjustable integrated structure, the soft and hard components of the conversion tool are hermetically mounted through the clamp, the soft and hard components are of a double-layer structure, the mounting matching condition of the conversion tool and the heat flow instrument equipment is observed through the hard cylindrical shell, and the double-layer soft and hard components play a role in isolating air;
according to the invention, a high-temperature-resistant silica gel interface is selected when a high-temperature 125 ℃ (conventional army temperature level) test is carried out, and a silica gel interface with tensile strength larger than 5.0 is selected when a low-temperature-55 ℃ (conventional army temperature level) test is carried out, so that the conversion tool meets the test requirements of different temperatures and can cover the reliability screening test requirements of the integrated circuit;
the invention meets the compatibility requirements of the DUT boards with different specifications and sizes, and realizes the high-low temperature test requirements of the integrated circuits of the DUT boards with different specifications and sizes by selecting the sizes of different rectangular cone interfaces, thereby improving the application coverage rate of the conversion tool;
the invention enables the conversion tool to create a closed test space through integrated molding, plays a role of isolating the external environment on the whole, has the functions of stable temperature, no frosting at low temperature and no air leakage at high temperature, and has the advantages of high adjustability, full coverage rate, good sealing property, excellent heat insulation property, good contact property and the like.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (7)
1. A frosting-proof universal heat flow instrument sealing test conversion tool is characterized by comprising a rigid cylindrical shell, an adjustable clamp, a soft funnel type temperature-resistant silica gel and a tower-shaped return interface with a skirt edge,
the soft funnel-shaped temperature-resistant silica gel is used for wrapping the air outlet of the heat flow meter and is connected with the tower-shaped return interface with the skirt edge; sleeving the soft funnel type temperature-resistant silica gel into the hard cylindrical shell, and adjusting the soft funnel type temperature-resistant silica gel to a proper position by using an adjustable clamp to be fastened and installed; selecting test DUT plates with different sizes, selecting tower-shaped return interfaces with corresponding specifications, connecting the tower-shaped return interfaces with the skirt edges with the air outlets of the heat flow meters, and gathering the heat flow meters in the central space above the integrated circuit to be tested of the test DUT plates; a testing machine table is placed on the bottom skirt edge of the conversion tool;
the skirt edge with the skirt edge tower-shaped return connector is provided with air holes, so that low-temperature frosting and high-temperature air leakage are prevented.
2. The anti-frosting general-type heat flow instrument sealing test conversion tool according to claim 1, wherein the position adjusted to be a position 2-3 cm away from the lower edge of the air outlet of the heat flow instrument device through the adjustable clamp.
3. The anti-frosting sealing test conversion tool for the general heat flow instrument is characterized in that the tower-shaped inverted interface with the skirt edge is an adjustable multi-group inverted interface, the inverted interface is arranged into a tower-shaped inverted cone structure, the conical interfaces with different sizes enable the conversion tool to meet the requirements of testing DUT plates with different sizes, a high-temperature resistant silica gel interface is selected for testing at a high temperature of 125 ℃, and a silica gel interface with a tensile strength of more than 5.0 is selected for testing at a low temperature of-55 ℃.
4. The anti-frosting universal heat flow meter sealing test conversion tool according to claim 1, wherein the conversion tool is provided with a hard cylindrical shell and a soft funnel type temperature-resistant silica gel which are arranged in double layers, and the set temperature is effectively controlled within an allowable range.
5. The anti-frosting universal heat flow meter sealing test conversion tool according to claim 4, wherein the test temperature is controlled to be changed within a range of +/-3 ℃ by the double-layer hard cylindrical shell and the soft funnel type temperature-resistant silica gel.
6. The anti-frosting general-purpose heat flow instrument sealing test conversion tool according to claim 1 or 5, wherein the rigid cylindrical shell and the soft funnel-type temperature-resistant silica gel are locked by an adjustable clamp, so that a sealed space is formed in a central space above the integrated circuit to be tested, an air isolation effect is achieved, the central space above the integrated circuit to be tested is kept at a constant temperature, and an effect of effectively controlling the temperature is achieved.
7. The anti-frosting universal heat flow instrument sealing test conversion tool according to claim 1, wherein 4 air holes with the pore diameter of 0.4-0.6cm are uniformly distributed at 4 positions 4-6cm away from the edge of the skirt edge, and the air holes are adsorbed on the surface of a DUT plate at the moment of starting the heat flow instrument to obtain a good closed space.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111601102.5A CN114486080A (en) | 2021-12-24 | 2021-12-24 | Anti-frosting universal heat flow instrument sealing test conversion tool |
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| CN202111601102.5A CN114486080A (en) | 2021-12-24 | 2021-12-24 | Anti-frosting universal heat flow instrument sealing test conversion tool |
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