CN209559976U - The test device of small resistive element temperature-coefficient of electrical resistance - Google Patents
The test device of small resistive element temperature-coefficient of electrical resistance Download PDFInfo
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- CN209559976U CN209559976U CN201920105902.XU CN201920105902U CN209559976U CN 209559976 U CN209559976 U CN 209559976U CN 201920105902 U CN201920105902 U CN 201920105902U CN 209559976 U CN209559976 U CN 209559976U
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Abstract
The utility model discloses a kind of test devices of small resistive element temperature-coefficient of electrical resistance, including such as lower component: heat-conducting block (3)；Heating sheet (4)；Refrigerating plant (2)；Electrical resistance collection device (5)；Resistance test plate (10)；Temperature control equipment (6)；Display screen (8).
Description
Technical field
The utility model belongs to the field of test technology, in particular to the test dress of a kind of small resistive element temperature-coefficient of electrical resistance
It sets.
Background technique
With the update of equipment and the progress of technology, the small resistive element of hydrid integrated circuit is more and more, in order to
Guarantee that hydrid integrated circuit works normally, the resistance precision for not requiring nothing more than small resistive element is high, and requires small resistive element electricity
The temperature coefficient of resistance is constant in a certain fit value.By the measurement and calculating of temperature-coefficient of electrical resistance, for its to heating property into
Row research and optimization resistance slurry.The measurement of temperature-coefficient of electrical resistance and calculation method are as follows: TCR (average)=(R2-R1)/(R1*
(T2-T1))=(R2-R1)/(R1* Δ T), wherein TCR is temperature-coefficient of electrical resistance, T1For initial temperature value, T2To preset high temperature
Temperature value, R1For the resistance value under initial temperature, R2For the resistance value being warming up under default high temperature.Corresponding small resistance can be obtained
The average TCR value of element.In the work in research and production field, there is a large amount of small resistive element that need to measure the temperature of resistance daily
Coefficient is spent, more circuit requirement marks the exact value of the temperature coefficient of resistance, it is therefore desirable to develop Accurate Determining resistance temperature
The device of coefficient.
Zhongxin International Integrate Circuit Manufacture's publication No. is that the patent of CN101329295B discloses electricity
Temperature coefficient measurement method is hindered, which is heated to set point temperatures measurement resistance using hot plate, and establishes resistance and electric current
Then corresponding relationship determines the relationship of electric current and temperature, finally calculates TCR value according to correlation formula in the database, still
The patent should measure for a period of time Static Electro resistance value in set temperature constant temperature when having ignored measurement resistance, real-time in electrified regulation
Acquisition resistance value will will affect the accuracy of measurement resistance, will bring ignorable shadow particularly with small valued resistor
It rings.Shanghai Huahong Grace Semiconductor Manufacturing Corporation's publication No. is that the patent of CN102636695B also discloses a kind of resistance temperature
The method of coefficient measurement is spent, which, which is described in detail, should measure probe self-resistance, probe and the shadow for visiting the contact resistance padded
It rings, and not can avoid the resistance value accuracy because of measurement end and the elasticity of Ohmic contact influence measurement resistance in actual test,
But the undisclosed method on how to measure corresponding TCR value.
The temperature-coefficient of electrical resistance measurement of the prior art has the disadvantage in that 1, measurement process is manual operation, and process is more
Complexity, the testing time is long, and measurement accuracy is influenced vulnerable to manual operation, is unable to automatic collection different temperatures and corresponds to resistance value, error
It is larger.2, resistance measures more many and diverse less than the temperature-coefficient of electrical resistance of 1 Ω, and is difficult to realize real-time measurement.3, the prior art
Temperature-coefficient of electrical resistance is measured as acquiring resistance value and temperature value in real time in electrified regulation, and the precision of resistance and temperature needs to be mentioned
It is high.4, the device measuring end of the temperature-coefficient of electrical resistance of the prior art and the elasticity of resistor electric contacts also influence resistance measurement knot
The accuracy of fruit.
To solve the above problems, proposing the utility model.
Utility model content
The purpose of this utility model is to provide a kind of test devices of small resistive element temperature-coefficient of electrical resistance, effectively solve
The existing measurement process of the temperature-coefficient of electrical resistance of the small resistive element of measurement is many and diverse, is unable to the corresponding electricity of automatic collection different temperatures
The elasticity of resistance, the accuracy of live line measurement resistance and device measuring end and resistor electric contacts influences temperature-coefficient of electrical resistance and surveys
The problems such as measuring the accuracy of result.
The purpose of this utility model is achieved by the following technical programs:
The utility model first aspect discloses a kind of test device of small resistive element temperature-coefficient of electrical resistance, the small electricity
Resistance element is for the element in integrated circuit；The test device includes such as lower component:
-- heat-conducting block 3, substantially cubic are inside disposed with temperature-detecting device 7, and one side is provided with several tests
Slot 9；
-- heating sheet 4, fitting are arranged in 3 lower end surface of heat-conducting block；
-- refrigerating plant 2 is arranged in above the heat-conducting block 3；
-- electrical resistance collection device 5；
-- resistance test plate 10 has test through-hole 1002 thereon, passes through 5 electricity of connecting line 1001 and the electrical resistance collection device
Connection；
-- temperature control equipment 6 is electrically connected with the temperature-detecting device 7, heating sheet 4 and refrigerating plant 2；
-- display screen 8 is electrically connected with above-mentioned each component.
Preferably, the precision of the temperature-detecting device 7 is higher than 0.001 DEG C；The precision of the electrical resistance collection device 5 is higher than
10-6Ω.Temperature-detecting device 7 detects temperature change in heat-conducting block 3 and is acquired place by the control of temperature control equipment 6 program
Reason, temperature control equipment 6 are read the temperature value of heat-conducting block 3 by temperature-detecting device 7, are compared with preset temperature value,
When actual temperature is lower than preset temperature, control heating sheet 4 heat simultaneously real-time measurement temperature value to heat-conducting block 3, until reaching
Preset temperature；When actual temperature be higher than preset temperature when control refrigerating plant 2 to heat-conducting block 3 cool down and real-time measurement its temperature
Angle value keeps temperature stable always in the range of preset temperature precision until reaching preset temperature.And since electrical resistance collection fills
Set 5 precision it is higher, resistance is also higher less than what the temperature-coefficient of electrical resistance of 1 Ω measured.
Preferably, the test through-hole 1002 is used to be welded and fixed the pin of small resistive element, passes through resistance test plate 10
Connection copper wire 1001 small resistive element can be connect with electrical resistance collection device 5.Avoidable resistance pins are directly and test lead
When being connected, pin connect influence of the elasticity to small resistance measurement with test lead, improves the essence of small resistive element resistance measurement
Exactness
Preferably, other in addition to being provided with 9 side of test trough of 2 entirety of the heat-conducting block 3, heating sheet 4 and refrigerating plant
Side is all coated with heatproof heat preservation insulating materials.Since heat insulation effect is preferable, so that the precision of temperature is higher；And it is set in measurement
At a temperature of resistance value when, heating sheet 4 is no longer powered.
Preferably, the test trough 9 is cylindric, cube-shaped or triangular prism shape.
Preferably, the test device further includes shell 1, and other component is arranged in the shell 1.
Preferably, the heat-conducting block 3 is block made of metal；The heating sheet 4 is piece made of carbon fibre pipe；It is described
Connecting line 1001 is copper wire.
Preferably, the heat-conducting block 3 is block made of copper.
Preferably, the temperature-detecting device 7 is thermocouple.
The utility model second aspect discloses the test device and measures small resistive element temperature-coefficient of electrical resistance method,
Steps are as follows: small resistive element being placed in test trough 9, the test that the pin of small resistive element is put into resistance test plate 10 is logical
It is welded and fixed in hole 1002, small resistive element and electrical resistance collection can be filled by the connection copper wire 1001 on resistance test plate 10
Set 5 connections；Set temperature frequency acquisition, soaking time, initial temperature T on display screen 81, set temperature T2；Starting test journey
Sequence, heating sheet 4 generate heat simultaneously heat is passed on heat-conducting block 3, then temperature is passed to and is tested on small resistive element, when temperature always
It is constant in target temperature, 5 automatic collection of electrical resistance collection device to T1Corresponding resistance value R1、T2Corresponding resistance value R2；Then
According to formula TCR (average)=(R2-R1)/(R1*(T2-T1))=(R2-R1)/(R1* Δ T) it calculates TCR and obtains small resistance member
The temperature-coefficient of electrical resistance of part.
The utility model has the beneficial effects that
1, the test device of the utility model is fixedly welded on resistance pins are measured on resistance test plate 10, then by resistance
Test board 10 is directly connect with electrical resistance collection device 5, when avoidable resistance pins are directly connected with test lead, pin and test lead
Influence of the elasticity to small resistance measurement is connected, the accuracy of small resistive element resistance measurement is improved.
2, the test device of the utility model can set initial temperature, the set temperature, temperature of measurement according to user demand
The setting at interval, frequency acquisition, the corresponding resistance value of automatic collection different temperatures, so that the influence of manual operation bring is solved,
Improve measurement accuracy.
3, the test trough 9 of the test device of the utility model is cylindric, cube-shaped or triangular prism shape or is designed as needing
The shape wanted, can be adapted to the small resistive element of various shape and size, uniformly provide heat to small resistive element, avoid heating not
Uniform problem improves the precision of measurement.
4, the test device heat insulation effect of the utility model is preferable, temperature-detecting device 7 precision is high, can be in setting temperature
Degree constant temperature is again acquired the resistance value of tested small resistive element after for a period of time, avoids and acquires in real time in electrified regulation
Influence of the resistance value to resistive element resistance value accuracy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of utility model device；
Fig. 2 is test board schematic diagram in the utility model；
1- shell, 2- refrigerating plant, 3- heat-conducting block, 4- heating sheet, 5- electrical resistance collection device, 6- temperature control equipment, 7-
Temperature-detecting device, 8- display screen, 9- test trough, 10- resistance test plate, 1001- connecting line, 1002- test through-hole.
Specific embodiment
Following embodiment is intended to illustrate the content of utility model, rather than to the further of scope of protection of the utility model
It limits.
Embodiment
A kind of test device of small resistive element temperature-coefficient of electrical resistance, as shown in Figure 1, the small resistive element is for collecting
At the element in circuit；The test device includes such as lower component:
-- heat-conducting block 3, substantially cubic are inside disposed with temperature-detecting device 7, and side is provided with several test troughs
9；Heat-conducting block 3 be copper at；The temperature-detecting device 7 is thermocouple, and precision is higher than 0.01 DEG C；The test trough 9 is circle
Tubular.
-- heating sheet 4, fitting are arranged in 3 lower end surface of heat-conducting block；Heating sheet 4 is made of carbon fibre pipe.
-- refrigerating plant 2 is arranged in above the heat-conducting block 3；
Other sides in addition to being provided with test trough 9 of 2 entirety of heat-conducting block 3, heating sheet 4 and refrigerating plant are coated with heatproof guarantor
Warm insulating materials
-- electrical resistance collection device 5；The precision of the electrical resistance collection device 5 is higher than 10-6Ω；
-- resistance test board 10 has test through-hole 1002 thereon, is adopted by connecting line copper wire 1001 and the resistance
Acquisition means 5 are electrically connected；The pin of small resistive element is put into the test through-hole 1002 of resistance test plate 10 and is welded and fixed, and can avoid
When small resistive element pin is directly connected with test lead, pin connect influence of the elasticity to small resistance measurement with test lead and improves
The accuracy of small resistive element resistance measurement.
-- temperature control equipment 6 is electrically connected with the temperature-detecting device 7, heating sheet 4 and refrigerating plant 2；
-- display screen 8 is electrically connected with above-mentioned each component.
Temperature-detecting device 7 detects temperature change in heat-conducting block 3 and is acquired by the control of temperature control equipment 6 program
Processing, temperature control equipment 6 are read the temperature value of heat-conducting block 3 by temperature-detecting device 7, are compared with preset temperature value
Compared with, when actual temperature is lower than preset temperature, control heating sheet 4 heat simultaneously real-time measurement temperature value to heat-conducting block 3, until
Reach preset temperature；When actual temperature is higher than preset temperature, control refrigerating plant 2 cool down and real-time measurement to heat-conducting block 3
Its temperature value keeps temperature stable always in the range of preset temperature precision until reaching preset temperature.And since resistance is adopted
The precision of acquisition means 5 is higher, and resistance is also higher less than the precision that the temperature-coefficient of electrical resistance of 1 Ω measures.The heat-conducting block 3, heating
Other sides of 2 entirety of piece 4 and refrigerating plant are coated with heatproof heat preservation insulating materials.Since heat insulation effect is preferable, so that temperature
Precision it is higher；And when measuring the resistance value under set temperature, heating sheet 4 is no longer powered.Test device further includes shell 1,
Other component is arranged in the shell 1.
Test device measures small resistive element temperature-coefficient of electrical resistance method, and steps are as follows: small resistive element is placed in survey
In experimental tank 9, the pin of small resistive element is put into the test through-hole 1002 of resistance test plate 10 and is welded and fixed, and passes through resistance test
Small resistive element can be connect by the connection copper wire 1001 on plate 10 with electrical resistance collection device 5；Set temperature is adopted on display screen 8
Collect frequency, soaking time, initial temperature T1, set temperature T2；Starting heating, heating sheet 4 generate heat and heat are passed to heat-conducting block 3
On, then temperature is passed to and is tested on small resistive element, when temperature is stable in target temperature always, electrical resistance collection device 5 is certainly
It is dynamic to collect T1Corresponding resistance value R1、T2Corresponding resistance value R2；Then according to formula TCR (average)=(R2-R1)/(R1*
(T2-T1))=(R2-R1)/(R1* Δ T) calculate the temperature-coefficient of electrical resistance that TCR obtains small resistive element.
Measure the initial temperature value T of certain small resistive element1It is 24.630 DEG C, presets the temperature value T of high temperature2It is 199.760
DEG C, initial temperature T1Under resistance value R1For 0.358644 Ω, it is warming up to default high temperature T2Under resistance value R2It is 0.705333
Ω is carried it into the calculation formula of TCR, TCR (average)=(R2-R1)/(R1*(T2-T1))=(R2-R1)/(R1* Δ T)
The temperature-coefficient of electrical resistance value for obtaining required small resistive element is 0.005520/ DEG C, i.e., 5520ppm/ DEG C.
Claims (9)
1. a kind of test device of small resistive element temperature-coefficient of electrical resistance, which is characterized in that the small resistive element is for collecting
At the element in circuit；The test device includes such as lower component:
-- heat-conducting block (3), substantially cubic are inside disposed with temperature-detecting device (7), and one side is provided with several tests
Slot (9)；
-- heating sheet (4), fitting are arranged in the heat-conducting block (3) lower end surface；
-- refrigerating plant (2) is arranged in the heat-conducting block (3) above；
-- electrical resistance collection device (5)；
-- resistance test plate (10) has test through-hole (1002) thereon, passes through connecting line (1001) and the electrical resistance collection device
(5) it is electrically connected；
-- temperature control equipment (6) is electrically connected with the temperature-detecting device (7), heating sheet (4) and refrigerating plant (2)；
Display screen (8) is electrically connected with above-mentioned each component.
2. test device according to claim 1, which is characterized in that the precision of the temperature-detecting device (7) is higher than
0.001℃；The precision of the electrical resistance collection device (5) is higher than 10-6Ω。
3. test device according to claim 1, which is characterized in that the test through-hole (1002) is used to weld to be measured small
The pin of resistive element.
4. test device according to claim 1, which is characterized in that the heat-conducting block (3), heating sheet (4) and refrigeration dress
Other sides in addition to being provided with test trough (9) for setting (2) entirety are coated with heatproof heat preservation insulating materials.
5. test device according to claim 1, which is characterized in that the test trough (9) be it is cylindric, cube-shaped or
Triangular prism shape.
6. test device according to claim 1, which is characterized in that the test device further includes shell (1), other
Component layout is in the shell (1).
7. test device according to claim 1, which is characterized in that the heat-conducting block (3) is block made of metal；It is described
Heating sheet (4) is piece made of carbon fibre pipe；The connecting line (1001) is copper wire.
8. test device according to claim 7, which is characterized in that the heat-conducting block (3) is block made of copper.
9. test device according to claim 1, which is characterized in that the temperature-detecting device (7) is thermocouple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920105902.XU CN209559976U (en) | 2019-01-22 | 2019-01-22 | The test device of small resistive element temperature-coefficient of electrical resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920105902.XU CN209559976U (en) | 2019-01-22 | 2019-01-22 | The test device of small resistive element temperature-coefficient of electrical resistance |
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| CN209559976U true CN209559976U (en) | 2019-10-29 |
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| CN201920105902.XU Active CN209559976U (en) | 2019-01-22 | 2019-01-22 | The test device of small resistive element temperature-coefficient of electrical resistance |
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