IC pin conductivity test circuit and tester
By using a combination of bidirectional switches, light-emitting modules, and gating switches in the IC pin continuity test circuit, intuitive testing of IC pin continuity is achieved, solving the problems of slow speed and low efficiency in traditional testing, and improving testing speed and accuracy.
Patent Information
- Application Number
- CN202422535384.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-19
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-19
AI Technical Summary
Traditional multimeters are not intuitive when testing the continuity of IC pins, and the testing speed is slow and inefficient.
An IC pin continuity test circuit is used, which includes a series bidirectional switch, an LED module, a selector switch, and a contact terminal. Different colored LEDs indicate continuity. By adjusting the normally open contact of the bidirectional switch and connecting it to the power supply polarity to form a circuit, intuitive test results can be obtained.
The test results are more intuitive, the testing speed is fast, and the efficiency is high. Different colored light-emitting elements indicate the direction of conduction, which improves the accuracy and efficiency of the test.
Smart Images
Figure CN223526492U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a semiconductor test technical field, concretely relates to IC pin conductivity test circuit and tester. BACKGROUND
[0002] In the semiconductor production process, the conductivity between each pin on the semiconductor needs to be tested, the traditional mode adopts the multimeter to test, and the operator contacts one meter pen on the multimeter with a pin on the measured device, and then contacts the other meter pen with other pins on the measured device, if there is current, it indicates that the two pins of the measured device are conductive, but when the multimeter is used to test, the test result of the pin conductivity is not intuitive, the test speed is slow, and the efficiency is low. UTILITY MODEL CONTENTS
[0003] The utility model provides a kind of IC pin conductivity test circuit and tester to the deficiency of prior art, which can realize the test result of pin conductivity more intuitive, test speed is fast, and efficiency is high.
[0004] To achieve the above object, the utility model adopts the following technical scheme:
[0005] An IC pin conductivity test circuit, comprising a power supply and a plurality of first circuits, each of the first circuits is connected with a bidirectional switch, a light-emitting module, a gating switch and a contact end in sequence.
[0006] The bidirectional switch has a normally closed contact and a normally open contact, the normally closed contact is electrically connected with one pole of the power supply, and the normally open contact is electrically connected with another pole of the power supply.
[0007] The light-emitting module has a first light-emitting element and a second light-emitting element arranged in reverse parallel.
[0008] The contact end is used for electrically connecting the pin on the measured device.
[0009] By connecting the contact end with the pin to be tested on the device under test, then turning on the gate switch, and then adjusting the normally open contact of one of the double-way switches to be connected with the positive pole of the power supply, a loop is formed among the power supply, one of the first circuits, the device under test, and the other first circuit. At this time, if the first light-emitting part and the second light-emitting part are lit at the same time, it indicates that a pin on the device under test is in conduction with other pins. Similarly, when testing other pins, only the corresponding gate switch needs to be turned on and the normally open contact of the corresponding double-way switch needs to be adjusted, so that the test result of the pin conduction is more intuitive, the test speed is fast, and the efficiency is high.
[0010] As a preferred solution, the first light-emitting part and the second light-emitting part are different in color.
[0011] As a preferred solution, when the current flows out from the positive pole of the power supply and flows into the device under test, the color of the first light-emitting part through which the current flows is red, and when the current flows out from the device under test and flows into the negative pole of the power supply, the color of the second light-emitting part through which the current flows is green.
[0012] As a preferred solution, the first light-emitting part and the second light-emitting part are both LED lights.
[0013] As a preferred solution, a balancing resistor is connected in series in the circuit between the gate switch and the light-emitting module.
[0014] As a preferred solution, the double-way switch is a press switch or a dial switch.
[0015] As a preferred solution, the normally closed contact is electrically connected with one pole of the power supply through a second circuit, and the normally open contact is electrically connected with the other pole of the power supply through a third circuit.
[0016] As a preferred solution, a power switch is arranged on the second circuit or the third circuit.
[0017] As a preferred solution, a double-pole double-throw switch is further included, the double-pole double-throw switch has a first movable contact and a second movable contact, the first movable contact is electrically connected with one pole of the power supply, the second movable contact is electrically connected with the other pole of the power supply, the first movable contact is selectively electrically connected with the second circuit or the third circuit, and the second movable contact is selectively electrically connected with the second circuit or the third circuit.
[0018] A tester has the IC pin conduction test circuit.
[0019] The utility model discloses a circuit connection state schematic diagram of embodiment of the utility model.
[0020] In order to more clearly set forth the structural features, technical means and the concrete purpose and function that it reached of the utility model, the utility model is made further detailed explanation below with specific embodiment and accompanying drawing: BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the circuit connection state schematic diagram of embodiment of the utility model.
[0022] Brief description of drawings:
[0023] 10-power supply, 11-second circuit, 12-third circuit, 13-power switch, 14-current limiting resistance, 15-double pole double throw switch, 151-first movable contact, 152-second movable contact, 20 (20a)-first circuit, 21 (21a)-bidirectional switch, 211 (211a)-normally closed contact, 212 (212a)-normally open contact, 22 (22a)-light emitting module, 221 (221a)-first light emitting piece, 222 (222a)-second light emitting piece, 23 (23a)-gating switch, 24 (24a)-contact end, 25 (25a)-balance resistance, 30-device under test, 31 (31a)-pin. DETAILED DESCRIPTION
[0024] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the position or element indicated must have a specific orientation, construct and operate in a specific orientation, therefore, it cannot be understood as the limitation of the utility model.
[0025] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "installation", "connection", "connect" should be broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.
[0026] As Figure 1 The utility model discloses an IC pin conduction test circuit, including power supply 10 and a plurality of first circuits 20, each first circuit 20 has bidirectional switch 21, light emitting module 22, gating switch 23 and contact end 24 in proper order and is connected in series, exemplary, the number of first circuit 20 is six, can understand, according to the test needs, the number of first circuit 20 can be freely expanded.
[0027] Bidirectional switch 21 has normally closed contact 211 and normally open contact 212, normally closed contact 211 is electrically connected with one pole (for example negative) of power supply 10, normally open contact 212 is electrically connected with another pole (for example positive) of power supply 10, it should be understood that normally closed contact 211 can also be electrically connected with the positive pole of power supply 10, and the corresponding normally open contact 212 is electrically connected with the negative pole of power supply 10.
[0028] Light emitting module 22 has first light emitting piece 221 and second light emitting piece 222 that are reversely connected in parallel, it needs to point out here that on the same first circuit 20, reversely connecting in parallel makes that current I can only pass through first light emitting piece 221 or second light emitting piece 222 at any moment, i.e. first light emitting piece 221 and second light emitting piece 222 on the same first circuit 20 can only light up one of them.
[0029] Contact end 24 is used for electrically connecting pin 31 on the device under test 30, when testing, power supply 10, one of first circuit 20, device under test 30, another first circuit 20a are connected in proper order and form a loop.
[0030] The first light-emitting piece 221 and the second light-emitting piece 222 are different in color; by adopting the first light-emitting piece 221 and the second light-emitting piece 222 of different colors, the conduction direction between a pin 31 and other pins 31 on the measured device 30 can be intuitively seen according to different colors, so that the test result is intuitive.
[0031] When the current I flows out from the positive pole of the power supply 10 and flows into the measured device 30, the color of the first light-emitting piece 221 through which the current I flows is red; when the current I flows out from the measured device 30 and flows into the negative pole of the power supply 10, the color of the second light-emitting piece 222a through which the current I flows is green; by setting the color of the first light-emitting piece 221 as red and the color of the second light-emitting piece 222a as green, when the red first light-emitting piece 221 and the green second light-emitting piece 222a are lit at the same time, it can be intuitively seen that the pin 31 corresponding to red and the pin 31 corresponding to green on the measured device 30 are in conduction, so that the test is more efficient and the test result is intuitive.
[0032] The first light-emitting piece 221 and the second light-emitting piece 222 are both LED lamps; by adopting LED lamps, the LED lamp serves as a light-emitting diode, which meets the one-way flow of the current I, so that the conduction direction between a pin 31 and other pins 31 on the measured device 30 can be more accurately tested.
[0033] The balance resistor 25 is connected in series on the circuit between the gating switch 23 and the light-emitting module 22.
[0034] The bidirectional switch 21 is a press switch or a dial switch, specifically, the bidirectional switch 21 is a press micro switch or a dial micro switch; by adopting the press switch or the dial switch, the operation is easy, and the test convenience is improved.
[0035] The normally closed contact 211 is electrically connected to one pole (for example, the negative pole) of the power supply 10 through the second circuit 11, and the normally open contact 212 is electrically connected to the other pole (for example, the positive pole) of the power supply 10 through the third circuit 12; by setting the second circuit 11 and the third circuit 12, the layout of the normally closed contact 211 and the normally open contact 212 of the bidirectional switch 21 electrically connected to the power supply 10 is neat, which is beneficial to detection and maintenance.
[0036] The power switch 13 is arranged on the second circuit 11 or the third circuit 12, and the current-limiting resistor 14 is arranged on the second circuit 11 or the third circuit 12, specifically, the power switch 13 and the current-limiting resistor 14 are connected in series on the third circuit 12.
[0037] Also include double pole double throw switch 15, the double pole double throw switch 15 has first movable contact 151 and second movable contact 152, the first movable contact 151 is electrically connected with one pole (for example negative) of power supply 10, the second movable contact 152 is electrically connected with another pole (for example positive) of power supply 10, the first movable contact 151 can be selectively electrically connected with second circuit 11 or third circuit 12, the second movable contact 152 can be selectively electrically connected with second circuit 11 or third circuit 12;By setting double pole double throw switch 15, so that the direction of the positive and negative poles of power supply 10 can be switched freely, when testing the forward conduction and reverse conduction between multiple pins 31 at the same time, the switching of the direction of current I can be realized by directly switching the positive and negative poles of power supply 10 through double pole double throw switch 15, at this time, it is not necessary to switch the direction of bidirectional switch 21 one by one, and the test efficiency is higher.
[0038] The utility model discloses still disclose a tester (not shown), the tester has the IC pin 31 conductivity test circuit, the power supply 10 can adopt battery, in practical application, can set up test seat (not shown) on the tester, each gold finger on test seat and corresponding contact end 24 electric connection, when testing, the device 30 of being measured is placed on test seat, makes the pin 31 on the device 30 of being measured and gold finger contact can carry out next step test work.
[0039] The utility model discloses a test circuit principle: power supply 10, one first circuit 20, the device 30 of being measured, another first circuit 20a are connected in sequence and form a loop, and the flow direction of current I is specifically: power supply 10 positive pole, current-limiting resistance 14, power switch 13, second movable contact 152, third circuit 12, normally open contact 212, first light emitting piece 221, balance resistance 25, gating switch 23, contact end 24, pin 31, the device 30 of being measured, pin 31a, gating switch 23a, balance resistance 25a, second light emitting piece 222a, normally closed contact 211a, second circuit 11, first movable contact 151, power supply 10 negative pole.
[0040] The utility model discloses a test method: under default condition, all gating switch 23 (23a) are in open circuit state, and the normally closed contact 211 (211a) of all bidirectional switch 21 (21a) is electrically connected with power supply 10 negative pole;
[0041] First, the operator will contact the end 24 electrically connected to the pin 31 on the device under test 30, contact the end 24a electrically connected to the pin 31a on the device under test 30, then turn on the gating switch 23 and the gating switch 23a, then turn on the power switch 13, and finally press the double switch 21 to make the normally open contact 212 connect the positive pole of the power supply 10, at this time the entire test circuit is turned on, when the current I flows into the pin 31, the current I passes through the first light-emitting element 221 to make the first light-emitting element 221 energized and emit red light, and when the current I flows out of the pin 31a, the current I passes through the second light-emitting element 222a to make the second light-emitting element 222a energized and emit green light, at this time the test result is that the pin 31 is connected to the pin 31a, and vice versa, press the double switch 21a to make the normally open contact 212a connect the positive pole of the power supply 10, and restore the double switch 21 to make the normally closed contact 211 connect the negative pole of the power supply 10, so as to test whether the pin 31a is connected to the pin 31.
[0042] In summary, the utility model discloses a bidirectional switch 21, light-emitting module 22, gating switch 23 and contact end 24 are sequentially connected in each first circuit 20, the bidirectional switch 21 has normally closed contact 211 and normally open contact 212, the normally closed contact 211 is electrically connected to one pole (for example negative pole) of the power supply 10, and the normally open contact 212 is electrically connected to another pole (for example positive pole) of the power supply 10, the light-emitting module 22 has first light-emitting element 221 and second light-emitting element 222 arranged in reverse parallel, when testing, first, the contact end 24 is electrically connected to the pin 31 to be tested on the device under test 30, then turn on the gating switch 23, and then adjust the normally open contact 212 of one of the bidirectional switches 21 to connect the positive pole of the power supply 10, so that a loop is formed between the power supply 10, one of the first circuits 20, the device under test 30 and the other first circuit 20a, at this time, if the first light-emitting element 221 and the second light-emitting element 222a are lit at the same time, it indicates that one of the pins 31 on the device under test 30 is connected to the other pin 31a, and similarly, when testing the other pin 31a, only the corresponding gating switch 23 needs to be turned on, and the normally open contact 212 of the corresponding bidirectional switch 21 needs to be adjusted, so that the test result of the pin 31 is more intuitive, the test speed is fast, and the efficiency is high.
[0043] The above is only a preferred embodiment of the utility model, and does not limit the utility model, so any modification, equivalent replacement, improvement, etc. made according to the technical actuality of the utility model to the above embodiment still belongs to the scope of the technical scheme of the utility model.
Claims
1. An IC pin conductivity test circuit, characterized by comprising: The IC pin continuity test circuit comprises a power supply and a plurality of first circuits, each of the first circuits has a bidirectional switch, a light-emitting module, a gating switch and a contact end connected in series. The bidirectional switch has a normally closed contact and a normally open contact, the normally closed contact is electrically connected to one pole of the power supply, and the normally open contact is electrically connected to another pole of the power supply. The light-emitting module has a first light-emitting element and a second light-emitting element arranged in reverse parallel. The contact end is used for electrically connecting a pin on a device under test.
2. The IC pin conductivity test circuit of claim 1, wherein, The first light-emitting element and the second light-emitting element are different in color.
3. The IC pin conductivity test circuit of claim 2, wherein, When current flows out from the positive pole of the power supply and flows into the device under test, the first light-emitting element through which the current flows is red in color, and when current flows out from the device under test and flows into the negative pole of the power supply, the second light-emitting element through which the current flows is green in color.
4. The IC pin conductivity test circuit of claim 1, wherein, The first light-emitting element and the second light-emitting element are both LED lights.
5. The IC pin conductivity test circuit of claim 1, wherein, A balancing resistor is connected in series in the circuit between the gating switch and the light-emitting module.
6. The IC pin conductivity test circuit of claim 1, wherein, The bidirectional switch is a press switch or a toggle switch.
7. The IC pin conductivity test circuit of claim 1, wherein, The normally closed contact is electrically connected to one pole of the power supply through a second circuit, and the normally open contact is electrically connected to another pole of the power supply through a third circuit.
8. The IC pin conductivity test circuit of claim 7, wherein, A power switch is arranged on the second circuit or the third circuit.
9. The IC pin conductivity test circuit of claim 7, wherein, The test instrument has the IC pin continuity test circuit according to any one of claims 1-9.
10. A tester characterized by,