Portable silicon material conduction type detection device

Abstract

The utility model provides a portable silicon material conduction type detection device, which comprises a power supply module, a first probe, a second probe and a third probe, the power supply module is used for providing alternating voltage, and the first probe and the third probe are respectively and electrically connected with the power supply module. And a detection indication module is arranged between the second probe and the power supply module and is used for detecting the direction of the current. The silicon material conduction type detector has the beneficial effects that the silicon material conduction type can be rapidly detected, the detection efficiency is improved, the structure is simple, the operation is convenient and fast, the carrying is convenient, and the production cost is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductor material detection, in particular to a portable silicon material conductivity type detection device. Background Art

[0002] Semiconductor materials are divided into P-type and N-type semiconductors according to the conductivity type. The conductivity type of semiconductor materials is a very important electrical performance parameter. Most carriers in P-type single crystals are holes, and it mainly relies on holes to conduct electricity; most carriers in N-type single crystals are electrons, and it mainly relies on electrons to conduct electricity. Therefore, P-type semiconductors can also be called hole semiconductors, and P-type semiconductors can also be called electron semiconductors. Silicon materials are the raw materials for single crystal pulling, and the conductivity type of these silicon materials must be strictly controlled. At present, there are many methods for detecting the conductivity type of semiconductor silicon materials, and the most commonly used are temperature difference method and rectification method. The three-probe rectification method is based on the metal-semiconductor contact theory and the conductivity principle of the semiconductor material itself. Three probes are pressed on the sample, and an AC power supply is added between the first probe and the third probe. According to the different directions of the current flowing through the resistor, it is judged whether the sample is P-type or N-type.

[0003] In the prior art, the silicon material conductivity type detection device is usually a desktop device, which consists of a host with a display screen, a probe and a connecting signal line. The desktop device has a low circuit integration, is not convenient to carry, and is mostly powered by 220V, which consumes a lot of power and has a high production cost. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a portable silicon material conductivity type detection device, which effectively solves the problems that the existing detection devices are inconvenient to carry and have high production costs, and overcomes the shortcomings of the existing technology.

[0005] The technical solution adopted by the utility model is: a portable silicon material conductivity type detection device, including a power module, a first probe, a second probe and a third probe, the power module is used to provide an alternating voltage, the first probe and the third probe are electrically connected to the power module respectively, and a detection indication module is provided between the second probe and the power module for detecting the direction of the current.

[0006] Optionally, the power supply module includes a direct current power supply, and an inverter circuit module is electrically connected to the direct current power supply.

[0007] Optionally, a switch is provided between the DC power supply and the inverter circuit module.

[0008] Optionally, the detection indication module includes a first indicator light and a second indicator light arranged in parallel, and the first indicator light and the second indicator light are used to detect the direction of the current.

[0009] Optionally, a first rectifier diode is electrically connected to the first indicator light.

[0010] Optionally, a second rectifier diode is electrically connected to the second indicator light.

[0011] Optionally, a second rectifier diode is electrically connected to the second indicator light.

[0012] Optionally, the first indicator light and the second indicator light are both LED indicator lights.

[0013] The advantages and positive effects of the utility model are as follows: due to the adoption of the above technical scheme, rapid detection of the conductivity type of silicon material is achieved, detection efficiency is improved, the structure is simple, the operation is convenient, it is easy to carry, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a portable silicon material conductivity type detection device according to an embodiment of the utility model.

[0015] Figure 2 The utility model is a circuit connection diagram of a portable silicon material conductivity type detection device according to an embodiment of the present invention.

[0016] Figure 3 The utility model is a circuit connection diagram of a portable silicon material conductivity type detection device according to an embodiment of the present invention.

[0017] Figure 4 The utility model is a circuit connection diagram of a portable silicon material conductivity type detection device according to an embodiment of the present invention.

[0018] In the figure:

[0019] 1. First probe 2. Second probe 3. Third probe

[0020] 4. Battery 5. Inverter circuit module 6. Switch

[0021] 7. Detection indicator module 8. Housing DETAILED DESCRIPTION

[0022] The embodiment of the utility model provides a portable device for detecting the conductivity type of silicon material. The embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0023] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0024] like Figure 1 As shown, the embodiment of the utility model is a portable silicon material conductivity type detection device, including a power module, a first probe 1, a second probe 2 and a third probe 3. The power module is used to provide an alternating voltage. The first probe 1 and the third probe 3 are electrically connected to the power module respectively. A detection indication module 7 is provided between the second probe 2 and the power module for detecting the direction of the current. According to the three-probe rectification principle, the conductivity type of the silicon material is determined by detecting the direction of the current.

[0025] Specifically, the power module includes a DC power supply, and an inverter circuit module 5 is electrically connected to the DC power supply. In some embodiments, the power module includes a 12V battery 4, and the 12V battery 4 is electrically connected to the inverter circuit module 5. When the device is in use, positive and negative square wave signals are generated by connecting the inverter circuit module 5, and the square wave signals are applied to the doped silicon material through the first probe 1 and the third probe 3, and the current direction at this time is detected by the second probe 2. The directions of the currents generated by silicon materials of different conductive types are different. The inverter circuit module 5 is a prior art and will not be described in detail here.

[0026] Preferably, a switch 6 is provided between the DC power supply and the inverter circuit module 5 .

[0027] Specifically, the detection indicator module 7 includes a first indicator light and a second indicator light arranged in parallel, the first indicator light and the second indicator light are used to detect the direction of the current, and different current directions cause different indicator lights to light up. The first indicator light and the second indicator light indicate P type and N type respectively, and the indicator light that is always on indicates the conductivity type of the silicon material.

[0028] Preferably, the first indicator light and the second indicator light are LED indicator lights, and different current directions cause different indicator lights to light up, thereby detecting the conductivity type of the silicon material.

[0029] Preferably, Figure 2As shown, in order to enhance the rectification effect, a first rectifying diode is electrically connected to the first indicator light.

[0030] Preferably, Figure 3 As shown, in order to enhance the rectification effect, a second rectifying diode is electrically connected to the second indicator light.

[0031] Preferably, Figure 4 As shown, in order to enhance the rectification effect, a first rectifying diode is electrically connected to the first indicator light, and a second rectifying diode is electrically connected to the second indicator light.

[0032] Embodiment 1: Figure 1 As shown, a portable silicon material conductivity type detection device includes a housing 8, and a first probe 1, a second probe 2, and a third probe 3 are installed at one end of the housing 8. A battery 4, an inverter circuit module 5, and a detection indication module 7 are installed in the housing 8, and a switch 6 is installed on one side of the housing 8. The battery 4 is a 12V DC power supply. The detection indication module 7 includes a first indicator light and a second indicator light. The first indicator light and the second indicator light are both LED indicator lights.

[0033] Circuit connection as Figure 2 As shown, the positive electrode 2 of the battery is connected to the pin 3 of the switch S, the pin 4 of the switch S is connected to the positive electrode of the inverter circuit module, and the negative electrode 1 of the battery is connected to the negative electrode of the inverter circuit module. The inverter circuit module output AC1 is connected to the positive electrode of LED1 and the negative electrode of LED2 and is also connected to the first probe, the negative electrode of LED1 is connected to the positive electrode of the first rectifier diode D1, the negative electrode of the first rectifier diode D1 is connected to the positive electrode of LED2, and is also connected to the second probe. The third probe is connected to the inverter circuit module output AC2.

[0034] Embodiment 2: Figure 1 As shown, a portable silicon material conductivity type detection device includes a housing 8, and a first probe 1, a second probe 2, and a third probe 3 are installed at one end of the housing 8. A battery 4, an inverter circuit module 5, and a detection indication module 7 are installed in the housing 8, and a switch 6 is installed on one side of the housing 8. The battery 4 is a 12V DC power supply. The detection indication module 7 includes a first indicator light and a second indicator light. The first indicator light and the second indicator light are both LED indicator lights.

[0035] Circuit connection as Figure 3As shown, the positive electrode 2 of the battery is connected to the pin 3 of the switch S, the pin 4 of the switch S is connected to the positive electrode of the inverter circuit module, and the negative electrode 1 of the battery is connected to the negative electrode of the inverter circuit module. The inverter circuit module output AC1 is connected to the positive electrode of LED1, the negative electrode of LED1 is connected to the positive electrode of LED2 and is also connected to the second probe. The negative electrode of LED2 is connected to the positive electrode of the second rectifier diode D2, the negative electrode of the second rectifier diode D2 is connected to the positive electrode of LED1, and is also connected to the first probe. The third probe is connected to the inverter circuit module output AC2.

[0036] Embodiment 3: Figure 1 As shown, a portable silicon material conductivity type detection device includes a housing 8, and a first probe 1, a second probe 2, and a third probe 3 are installed at one end of the housing 8. A battery 4, an inverter circuit module 5, and a detection indication module 7 are installed in the housing 8, and a switch 6 is installed on one side of the housing 8. The battery 4 is a 12V DC power supply. The detection indication module 7 includes a first indicator light and a second indicator light. The first indicator light and the second indicator light are both LED indicator lights.

[0037] Circuit connection as Figure 4 As shown, the positive electrode 2 of the battery is connected to the pin 3 of the switch S, the pin 4 of the switch S is connected to the positive electrode of the inverter circuit module, and the negative electrode 1 of the battery is connected to the negative electrode of the inverter circuit module. The inverter circuit module output AC1 is connected to the positive electrode of LED1, the negative electrode of LED1 is connected to the positive electrode of the first rectifier diode D1, the negative electrode of the first rectifier diode D1 is connected to the positive electrode of LED2, and the second probe is connected at the same time. The negative electrode of LED2 is connected to the positive electrode of the second rectifier diode D2, the negative electrode of the second rectifier diode D2 is connected to the positive electrode of LED1, and the first probe is connected at the same time. The third probe is connected to the inverter circuit module output AC2.

[0038] The advantages and positive effects of the utility model are:

[0039] By adopting the above technical solution, the conductivity type of silicon material can be quickly detected, the detection efficiency is improved, the structure is simple, the operation is convenient, it is easy to carry, and the production cost is low.

[0040] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A portable silicon material conductivity type detection device, characterized in that: It includes a power module, a first probe, a second probe and a third probe. The power module is used to provide an alternating voltage. The first probe and the third probe are electrically connected to the power module respectively. A detection indication module is provided between the second probe and the power module for detecting the direction of the current.

2. A portable silicon material conductivity type detection device according to claim 1, characterized in that: The power supply module includes a direct current power supply, and an inverter circuit module is electrically connected to the direct current power supply.

3. A portable silicon material conductivity type detection device according to claim 2, characterized in that: A switch is provided between the DC power supply and the inverter circuit module.

4. A portable silicon material conductivity type detection device according to any one of claims 1 to 3, characterized in that: The detection indication module comprises a first indicator light and a second indicator light which are arranged in parallel, and the first indicator light and the second indicator light are used to detect the direction of the current.

5. A portable silicon material conductivity type detection device according to claim 4, characterized in that: The first indicator light is electrically connected to a first rectifier diode.

6. A portable silicon material conductivity type detection device according to claim 4, characterized in that: The second indicator light is electrically connected to a second rectifier diode.

7. A portable silicon material conductivity type detection device according to claim 5, characterized in that: The second indicator light is electrically connected to a second rectifier diode.

8. A portable silicon material conductivity type detection device according to any one of claims 5 to 7, characterized in that: The first indicator light and the second indicator light are both LED indicator lights.

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