TWI832430B - Electrostatic discharge measurement device and electrostatic discharge measurement method - Google Patents

Abstract

A electrostatic discharge (ESD) measurement method includes disposing an ESD measurement device at a predetermined position inside a chassis under test, separating a measurement probe of the ESD device and a predetermined plane in the chassis under test by a predetermined distance, applying an ESD pulse on the chassis under test so that the measurement probe measures an electromagnetic radiation field generated by the ESD pulse, receiving a measurement signal related to the electromagnetic radiation field from the measurement probe, and installing an electrostatic protection element and/or setting an electrostatic protection distance according to the measurement signal and the predetermined distance.

Description

Electrostatic discharge measuring device and electrostatic discharge measuring method

This application relates to an electrostatic discharge measuring device and an electrostatic discharge measuring method, in particular to an electrostatic discharge measuring device and an electrostatic discharge measuring method that can measure a chassis to be tested.

The impact of electrostatic discharge (ESD) on electronic products is that in addition to the electrostatic discharge current being fed into the victim product, which may damage the victim product, another problem is that when electrostatic discharge occurs, the radiation noise generated by the discharge current may generate signals for the victim product. interference effects. For example, according to the specifications defined by the IEC 61000-4-2 or EN 61000-4-2 regulations, when ESD 4 kilovolts (kV) discharge, the product must be able to accept the discharge of 15 in 1 nanosecond (ns). Ampere (A) discharge current, and the product must not have system functional abnormalities to meet regulatory requirements.

At present, in the early stages of chassis development, the evaluation of electrostatic discharge shielding effectiveness can often only rely on the experience of engineers. After reviewing the design drawings, they then conduct visual discussions on the prototype chassis to evaluate possible electrostatic discharge prevention countermeasures. , and the actual measurement of electrostatic discharge cannot be carried out.

For the actual measurement and evaluation of the ESD prevention and control effectiveness of the chassis, the ESD measurement can only be carried out after the software and hardware of the system-related circuit boards are installed. Under this situation, the ESD shielding effectiveness evaluation of the chassis will rely too much on the experience of engineers, and will also fall into the dilemma of being forced to replace early design with late-stage debugging. If the electrostatic discharge protection capability of the chassis is not high enough in the future, you will have to face the problem of being forced to modify the original design.

The embodiment provides an electrostatic discharge measuring device, including a measuring probe and an adjusting device. The measurement probe includes a first end and a second end, wherein the first end is used to measure an electromagnetic wave radiation field generated by an electrostatic discharge pulse, and the second end is used to output an electromagnetic wave radiation field related to the electromagnetic wave radiation field. a measurement signal. The adjustment device is used to move the measurement probe along a first reference axis.

Another embodiment provides an electrostatic discharge measuring method, which includes arranging an electrostatic discharge measuring device at a predetermined position in a chassis under test; using a measurement probe of the electrostatic discharge measuring device and the chassis under test There is a predetermined distance between a predetermined plane in the chassis; applying an electrostatic discharge pulse to the chassis under test, so that the measurement probe measures an electromagnetic wave radiation field generated by the electrostatic discharge pulse; receiving data from the measurement probe A measurement signal, wherein the measurement signal is related to the electromagnetic wave radiation field; and based on the measurement signal and the predetermined distance, install an electrostatic discharge protection component and/or set an electrostatic discharge protection distance.

100: Electrostatic discharge measuring device

110: Measuring probe

110A, 141A: first end

110B, 141B: second end

120:Adjustment device

122:Mobile platform

122A: First side

122B: Second side

124:Probe holder

126:Adjustment Department

128:Screw

129: Knob

132: Parallel pin

134:fixed frame

135: Connector

136:Magnetic base

136A:Base body

136B:Control knob

137:Adjustment block

141: Telescopic probe

142: Distance scale

310: Electrostatic discharge simulator

320:Cable wire

330:Oscilloscope

340:Isolation device

400: Electrostatic discharge measurement method

410 to 450: steps

C1: Chassis under test

E1: Electromagnetic wave radiation field

F1: Scheduled plane

H1: first piercing

H2: Second piercing

H3: The third piercing

P1: Reserved location

P51 to P59: Location

S1: Measurement signal

X1: first reference axis

X2: Second reference axis

Figure 1 is a perspective view of the electrostatic discharge measuring device in the embodiment.

Figure 2 is a perspective view of the electrostatic discharge measuring device in Figure 1 from another perspective.

Figure 3 is a schematic diagram of electrostatic discharge measurement using the electrostatic discharge measurement device in Figures 1 and 2.

Figure 4 is a flow chart of the electrostatic discharge measurement method in implementation.

Figure 5 is a schematic diagram of the measured positions in the chassis under test in the embodiment.

In order to effectively reduce the above problems, embodiments provide solutions as follows. Figure 1 is a perspective view of the electrostatic discharge measuring device 100 in the embodiment. Figure 2 is a perspective view of the electrostatic discharge measuring device 100 of Figure 1 from another perspective. For example, Figure 1 can be a perspective view from above, and Figure 2 can be This is a perspective view from below. Figure 3 is a schematic diagram of electrostatic discharge measurement using the electrostatic discharge measurement device 100 of Figures 1 and 2 .

As shown in FIGS. 1 and 2 , the electrostatic discharge measuring device 100 may include a measuring probe 110 and an adjusting device 120 . The measurement probe 110 may include a first end 110A and a second end 110B. The first end 110A may be used to measure the electromagnetic wave radiation field E1 generated by the electrostatic discharge pulse, and the second end 110B may be used to output the electromagnetic wave radiation field E1 related to the electromagnetic wave radiation field E1. The measurement signal S1. The adjustment device 120 can be used to move the measurement probe 110 along the first reference axis X1. For example, the measurement probe 110 can move forward and backward along the first reference axis X1.

As shown in FIGS. 1 and 2 , the adjustment device 120 may include a moving platform 122 and a probe holder 124 . The moving platform 122 may be configured to move along the first reference axis X1. The probe holder 124 can be fixed on the first side 122A of the mobile platform 122 to fix the measurement probe 110 . Therefore, when the moving platform 122 moves along the first reference axis X1, the measurement probe 110 can be driven to move along the first reference axis X1 through the probe holder 124, thereby adjusting the position of the measurement probe 110.

As shown in FIGS. 1 and 2 , the adjustment device 120 may further include an adjustment part 126 , a screw 128 and a knob 129 . The adjustment part 126 may be disposed on the second side 122B of the mobile platform 122 and includes the first through hole H1. The screw rod 128 can pass through the first hole H1 along the first reference axis X1 to be rotated to move the adjustment portion 126 and the moving platform 122 along the first reference axis X1. The knob 129 can be connected to the screw rod 128 for rotating the screw rod 128 .

As shown in FIGS. 1 and 2 , the adjustment part 126 may further include at least one second through hole H2. The adjusting device 120 may further include at least one parallel pin 132. Each parallel pin 132 may pass through the second through hole H2 along the first reference axis X1 to stabilize the adjusting part 126 and the moving platform 122, so that the adjusting part 126 and the moving platform 122 It is more stable when moving along the first reference axis X1.

As shown in FIGS. 1 and 2 , the adjustment device 120 may further include a fixing bracket 134 , a connecting piece 135 and a magnetic base 136 . The fixing bracket 134 can be connected to the parallel pin 132 and includes a third through hole H3, wherein the screw rod 128 can pass through the third through hole H3 along the first reference axis X1. The connecting piece 135 can be connected to the fixing frame 134 . The magnetic base 136 can be connected to the connecting piece 135 to set the electrostatic discharge measuring device 100 at the predetermined position P1 through magnetic force. (As shown in Figure 3).

In Figures 1 and 2, the magnetic base 136 may include a base body 136A and a control knob 136B. When the control knob 136B is turned to the first position, the base body 136A may have magnetic force, and when the control knob 136B is turned to In the second position, the base 136A may not have magnetic force, so that it is easy to adjust the position of the electrostatic discharge measuring device 100 . Figures 1 and 2 are only examples. According to other embodiments, other suitable methods (such as bolts or slide rails) can be used to adjust and fix the position of the electrostatic discharge measuring device 100 .

As shown in FIGS. 1 and 2 , the adjustment device 120 may further include an adjustment block 137 . The adjustment block 137 can be connected to the fixed frame 134 for adjusting the mobile platform 122 along the second reference axis X2 perpendicular to the first reference axis X1. For example, the adjustment block 137 can be used to move the moving platform 122 up and down, thereby moving the measurement probe 110 up and down. For example, the adjustment block 137 may have bolts. After loosening the bolts, the moving platform 122 can be adjusted to a suitable position along the second reference axis X2, and then the bolts can be tightened to fix the position of the moving platform 122.

As shown in FIGS. 1 and 2 , the electrostatic discharge measuring device 100 may further include a telescopic probe 141 and a distance meter 142 . The telescopic probe 141 is retractable and includes a first end 141A and a second end 141B. The first end 141A can be used to press against a predetermined plane F1 in the chassis C1 under test (as shown in Figure 3). The distance gauge 142 can be disposed on the first side 122A of the mobile platform 122 and connected to the second end 141B of the telescopic probe 141. The distance gauge 142 can be used to measure the distance between the probe rod 110 and the predetermined plane F1. . For example, the first end 141A of the telescopic probe 141 can be pressed against the predetermined plane F1 in the chassis C1 under test to shorten the telescopic probe 141, and the distance gauge 142 can be reset to zero along the first reference axis X1. The mobile platform 122 is moved to move the measurement probe 110 further away from the predetermined plane F1, and then the distance meter 142 is read to know the distance the measurement probe 110 has been moved. Thereby, the distance that the measurement probe 110 is moved can be controlled and known. For example, the distance gauge 142 may be a dial indicator, and its accuracy may be 0.01 millimeter (mm).

As shown in FIG. 3 , the electrostatic discharge measuring device 100 can be installed at a predetermined position P1 in the chassis C1 under test. The telescopic probe 141 can be pressed against the predetermined plane F1 in the chassis C1 under test first, and then the selector button 129 can be adjusted. To adjust the position of the measuring probe 110. For example, the predetermined position P1 may be located at the inner bottom of the chassis C1 under test, and the predetermined plane F1 may be the inner wall of the chassis C1 under test. An electrostatic discharge simulator 310 (eg, an electrostatic discharge simulator gun) may be used to apply an electrostatic discharge pulse to generate an electromagnetic wave radiation field E1. For example, an electrostatic discharge pulse may be applied adjacent to an opening or slit of the chassis C1 under test. The measurement probe 110 of the electrostatic discharge measurement device 100 can transmit the measurement signal S1 to the oscilloscope 330 through the cable 320 according to the intensity of the electromagnetic wave radiation field E1. The user can read the measurement results on the oscilloscope 330 . For example, the oscilloscope 330 can be placed within an isolation device 340 (such as a Faraday cage) to reduce unintended effects caused by electromagnetic wave radiation fields.

In the examples shown in Figures 1 to 3, it is mentioned that the moving platform 122 can be moved along the first reference axis X1 (for example, the front and rear direction) and the second reference axis X2 (for example, the up and down direction), thereby adjusting the measurement probe 110. Location. However, this is only an example. If an adjustment block is added, the moving platform 122 can be moved along the third reference axis (for example, left and right direction) to adjust the position of the measurement probe 110 .

Figure 4 is a flow chart of the electrostatic discharge measurement method 400 in implementation. When performing the electrostatic discharge measurement method 400, the electrostatic discharge measurement device 100 in Figures 1 and 2 can be used. As shown in Figures 1 to 4, the electrostatic discharge measurement method 400 may include the following steps: Step 410: Set the electrostatic discharge measurement device 100 at a predetermined position P1 in the chassis C1 under test; Step 420: Discharge the electrostatic discharge There is a predetermined distance D1 between the measurement probe 110 of the measurement device 100 and the predetermined plane F1 in the chassis C1 under test; Step 430: Apply an electrostatic discharge pulse to the chassis C1 under test so that the measurement probe 110 measures static electricity. The electromagnetic wave radiation field E1 generated by the discharge pulse; Step 440: Receive the measurement signal S1 from the measurement probe 110, where the measurement signal S1 can be related to the electromagnetic wave radiation field E1; and Step 450: According to the measurement signal S1 and the predetermined distance D1 , install electrostatic discharge protection components and /or set the electrostatic discharge protection distance.

For example, in step 420, the knob 129 in Figure 1 can be rotated to adjust the position of the measurement probe 110 along the first reference axis X1 in steps, and the adjustment distance of each step can be, for example, 1 mm.

According to an embodiment, in step 450, an electrostatic discharge protection component may be installed and/or an electrostatic discharge protection distance may be set based on the measurement signal S1, the predetermined distance D1, and the electrical characteristics of the device under test.

According to another embodiment, in step 450, an electrostatic discharge protection component may be installed and/or an electrostatic discharge protection distance may be set based on the measurement signal S1, the predetermined distance D1 and the pre-measured electrostatic discharge value of the device under test.

For example, if the device under test that will be installed in the chassis C1 under test in the future includes a circuit board and electronic components installed on the circuit board (such as a processor, memory, PCI Express and other bus cards, etc.) , then the electrostatic discharge protection components can be installed and/or the electrostatic discharge protection distance can be set based on the electrical characteristics related to electrostatic discharge protection recorded in the relevant documents of the circuit board and the electronic components on the circuit board.

In addition, electrostatic discharge protection components can be installed and/or electrostatic discharge protection distances can be set based on pre-measured electrostatic discharge values obtained by previously applying electrostatic discharge to the device under test.

Figure 5 is a schematic diagram of various positions of C1 in the tested chassis measured by the electrostatic discharge measuring device 100 and the electrostatic discharge measuring method 400 in the embodiment. As shown in Figure 5, electrostatic discharge pulses can be applied multiple times near position P54, and multiple measurements can be made to obtain the severity of the impact of electrostatic discharge at positions P51 to P59 of C1 in the chassis under test. For example, as shown in Table 1:

Table 1 is only an example and does not limit the number of measured positions and results. Table 1 describes how the degree of impact of electrostatic discharge on each location in the tested chassis C1 can be obtained, thereby helping users design the chassis and determine the location of electronic components within the chassis.

In summary, by using the above-mentioned electrostatic discharge measuring device 100 and electrostatic discharge measuring method 400, the impact of electrostatic discharge on various positions in the chassis can be measured in advance before the circuit board and electronic components are installed in the chassis. . Therefore, accurate measurement data can be provided to help users design the chassis, determine the position of electronic components in the chassis, and design related electrostatic discharge protection devices, thereby improving the design process related to electrostatic discharge protection. The electrostatic discharge measurement device 100 and the electrostatic discharge measurement method 400 can also contribute to applications such as artificial intelligence, 5G communications, 6G communications, edge computing, machine learning, Internet of Vehicles, Internet of Things, and cloud services.

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the patentable scope of the present invention shall fall within the scope of the present invention.

400: Electrostatic discharge measurement method

410 to 450: steps

Claims (8)

An electrostatic discharge measuring device includes: a measuring probe, including a first end for measuring an electromagnetic wave radiation field generated by an electrostatic discharge pulse, and a second end for outputting information related to the electromagnetic wave radiation. A measurement signal of the field; and an adjustment device for moving the measurement probe along a first reference axis. The adjustment device includes: a moving platform for moving along the first reference axis; a fixed probe a seat, fixed on one of the first sides of the mobile platform, for fixing the measuring probe; an adjustment part, provided on one of the second sides of the mobile platform, including a first through hole; a screw, along the first The reference axis passes through the first through hole for being rotated to move the adjustment part and the moving platform along the first reference axis; and a knob is connected to the screw for rotating the screw; wherein the electrostatic discharge pulse It is applied to a chassis under test, the electrostatic discharge measuring device is installed at a predetermined position in the chassis under test, and there is a predetermined distance between the measurement probe and a predetermined plane of the chassis under test; and A connecting line between the first end and the second end of the measuring probe is parallel to the first reference axis. The electrostatic discharge measuring device as claimed in claim 1, wherein the adjustment part further includes a second through hole, and the moving device further includes: a parallel pin passing through the second through hole along the first reference axis for stabilization. the adjustment part and the mobile platform. The electrostatic discharge measuring device as claimed in claim 2, wherein the adjustment device further includes: a fixed frame connected to the parallel pin and including a third through hole, wherein the screw passes through the third hole along the first reference axis. Three through holes; a connecting piece connected to the fixed frame; and a magnetic base connected to the connecting piece to set the electrostatic discharge measuring device at the predetermined position through magnetic force. The electrostatic discharge measuring device as claimed in claim 2, wherein the adjustment device further includes: an adjustment block connected to the fixed frame for adjusting the mobile platform along a second reference axis perpendicular to the first reference axis. . The electrostatic discharge measuring device as claimed in claim 1, further comprising: a telescopic probe including a first end for pressing against the predetermined plane in the chassis under test, and a second end; and a distance A gauge is provided on the first side of the mobile platform and connected to the second end of the telescopic probe. The distance gauge is used to measure the distance between the measurement probe and the predetermined plane. An electrostatic discharge measuring method, including: arranging an electrostatic discharge measuring device at a predetermined position in a tested chassis; using a measuring probe of the electrostatic discharge measuring device and a predetermined position in the tested chassis There is a predetermined distance between the planes; applying an electrostatic discharge pulse to the chassis under test so that the measurement probe measures an electromagnetic wave radiation field generated by the electrostatic discharge pulse; receiving a measurement signal from the measurement probe , where the measurement signal is related to the electromagnetic wave radiation field; And based on the measurement signal and the predetermined distance, install an electrostatic discharge protection component and/or set an electrostatic discharge protection distance; one of the adjustment devices is used to move the measurement probe along a reference axis, and the adjustment device includes: A mobile platform for moving along the reference axis; a probe holder fixed on a first side of the mobile platform for fixing the measurement probe; an adjustment part provided on a first side of the mobile platform Both sides include a first through hole; a screw rod passing through the first through hole along the reference axis for being rotated to move the adjustment part and the moving platform along the reference axis; and a knob connected to the screw rod , used to rotate the screw; and a line between a first end and a second end of the measuring probe is parallel to the reference axis system. The electrostatic discharge measurement method as described in claim 6, wherein installing the electrostatic discharge protection component and/or setting the electrostatic discharge protection distance based on the measurement signal and the predetermined distance includes: based on the measurement signal, the predetermined distance distance and an electrical characteristic of a device under test to install the electrostatic discharge protection component and/or set the electrostatic discharge protection distance. The electrostatic discharge measurement method as described in claim 6, wherein installing the electrostatic discharge protection component and/or setting the electrostatic discharge protection distance based on the measurement signal and the predetermined distance includes: based on the measurement signal, the predetermined distance The distance and an electrostatic discharge pre-measurement value are used to install the electrostatic discharge protection component and/or set the electrostatic discharge protection distance.

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