CN105372575A - Diode failure analysis device - Google Patents

Abstract

The invention discloses a diode failure analysis device in the field of diode detection, which comprises a box body and a reaction kettle. The box body is in the shape of a rectangular box. The support arm, the middle part of the reactor is hinged between the two support arms. A cylinder is fixed on the inner wall of the top of the box body, and the output end of the cylinder is connected with a telescopic rod, and a connecting rod is hinged on the telescopic rod, and the other end of the connecting rod is hinged on the reactor. A guide groove is provided on the inner wall of the box below the support arm, and a waste liquid collection box is provided at the bottom inside the box body, and the bottom end of the guide groove extends into the waste liquid collection box. This scheme can complete the multiple heating and corrosion of the diode failure analysis experiment, without the operator directly contacting the reaction kettle, and the waste acid solution can be recycled and processed in a centralized manner, which makes the experiment less dangerous, reduces environmental pollution, and is more environmentally friendly and more efficient. It is convenient to carry out failure analysis experiments on diodes.

Description

Diode failure analysis device

technical field

The invention relates to the field of diode detection, in particular to a diode failure analysis device.

Background technique

During long-term use, diodes will fail due to various reasons and cannot work normally, which will seriously affect the normal use of electronic devices. In order to reduce the occurrence of diode failure, failure analysis experiments are usually carried out on failed diodes to find out the cause of diode failure, and then make targeted improvements to the diode. The experimental process is to collect samples of short-circuit failures in the use of diodes and screen failure data such as stress conditions or service conditions, and conduct electrical parameter tests, cap removal, protective glue removal, die and electrode separation, solder removal, and microscopic observation of these samples. Steps to find out the failure location, analyze the internal quality factors or use factors that cause the diode failure, and the failure process.

At present, the diode failure analysis experiment usually puts the diode in a beaker and heats and corrodes the surface of the diode layer by layer through various strong acids, and finally obtains the chip for analysis. The existing experiment is a manual operation, which requires manual contact with various strong acids. The beaker needs to be heated through an alcohol lamp and an asbestos net. After each corrosion, the operator needs to manually remove the beaker to discharge the used acid. The labor intensity is high and it is easy to fatigue. The acid liquid volatilized during the corrosion process will cause irritating damage to the operator's eyes and respiratory tract, and there is a certain degree of instability and danger. Moreover, the waste acid liquid after corrosion is not treated centrally, and the discharge is not standardized, which will easily pollute the environment. The labor cost of the experiment is high, the efficiency of the manual failure analysis experiment is low, and it is very inconvenient to carry out the failure analysis experiment on the diode.

Contents of the invention

The invention intends to provide a diode failure analysis device to facilitate the failure analysis of the diode, reduce the risk of the experiment, and reduce the pollution to the environment.

In order to achieve the above object, the basic technical scheme of the present invention is as follows: the diode failure analysis device includes a box body and a reaction kettle, the box body is a vertical rectangular box, and the upper end of the box body is provided with a feed port, and the inner wall of the box body One side of the reactor is fixed with two laterally juxtaposed support arms, and the middle part of the reactor is hinged between the free ends of the two support arms. A vertically installed cylinder is fixed on the inner wall of the top of the box, the output end of the cylinder is connected with a telescopic rod, the free end of the telescopic rod is hinged with a connecting rod, and the other end of the connecting rod is hinged at the bottom of the reactor near the cylinder. . The inner wall of the box below the support arm is provided with a guide groove inclined downward, and the bottom of the box is provided with a waste liquid collection box, and the lower end of the guide groove extends into the waste liquid collection box.

The principle and advantages of this scheme are: during operation, put the diode sample in the reaction kettle, pour the acid solution into the reaction kettle, energize the reaction kettle to generate heat to heat the acid solution, and the diode sample is heated and corroded in the reaction kettle . After a corrosion process, there is no need to manually touch the reactor to pour the acid solution, the reactor can be tilted directly through the cylinder and the telescopic rod to pour the reacted acid solution out of the reactor, and the used acid solution flows into the waste liquid from the guide groove for collection boxes for centralized processing. The support arm is set to support and fix the reactor, and the wire groove can be set in the support arm to facilitate the power supply to the reactor. The balance state of the reactor can be adjusted by setting the cylinder, telescopic rod, and connecting rod, so that the reactor can be kept in balance during use, and it is convenient to tilt the reactor after the reaction to allow the acid to flow out. The guide groove and the waste liquid collection box are set up to facilitate the centralized recovery and treatment of the used acid liquid, so as to avoid pollution and damage to the environment caused by improper discharge of acid liquid. This scheme can complete the repeated heating and corrosion of the experiment through the cylinder, telescopic rod, support arm, and reactor, without the operator directly touching the reactor, setting up a box to support, protect and isolate the whole, and setting up a waste liquid collection box to collect waste acid The liquid is recycled and processed in a centralized manner, which makes the experiment less dangerous, reduces environmental pollution, is more environmentally friendly, and makes it easier to conduct failure analysis experiments on diodes.

In the preferred solution 1, as an improvement of the basic solution, a control box is provided on the top of the box, and the control box is respectively connected to the air cylinder and the reactor for signals. The temperature in the cylinder, telescopic rod and reactor is controlled through the control box, the operation is more convenient, no need to touch the reactor manually, it is safer, and the influence of human factors on the experimental results is less.

The second preferred solution, as an improvement of the first preferred solution, the cylinder is fixed on the box by hexagonal bolts. In this way, the cylinder can be stably and reliably fixed on the box body, so that the work of the cylinder is more stable.

The third preferred option, as an improvement of the second preferred option, the upper end of the box is hinged with a transparent box cover for blocking the feed inlet. The transparent box cover is convenient for observing the reaction in the reactor, preventing the volatilized acid liquid from escaping into the environment during the experiment and causing harm to the operator, further reducing the risk of the experiment.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

detailed description

The present invention will be described in further detail below by means of specific embodiments:

The reference signs in the drawings of the description include: box body 1, guide groove 2, support arm 3, box cover 4, reaction kettle 5, control box 6, cylinder 7, telescopic rod 8, connecting rod 9, waste liquid collection box 10 .

The embodiment is basically shown in Figure 1: a diode failure analysis device, including a box body 1, a reaction kettle 5, and a reversing device. The box cover 4, one side of the inner wall of the box body 1 is fixed with two support arms 3 arranged side by side horizontally, and the middle part of the reaction kettle 5 is hinged between the free ends of the two support arms 3. The inner wall of the top of the box body 1 is fixed with a vertically installed cylinder 7 by a hexagonal bolt, the output end of the cylinder 7 is connected with a telescopic rod 8, the free end of the telescopic rod 8 is hinged with a connecting rod 9, and the other end of the connecting rod 9 Hinged at the bottom of reactor 5 near cylinder 7 one side. The inner wall of the box body 1 below the support arm 3 is provided with a guide groove 2 inclined downward, and the bottom of the box body 1 is provided with a waste liquid collection box 10, and the lower end of the guide groove 2 extends to the waste liquid collection. Inside box 10. The top of the box body 1 is provided with a control box 6, and the control box 6 is respectively connected with the air cylinder 7 and the reaction kettle 5 in signal. The reaction kettle 5 includes a body and an end cover. The body is a circular cup with an open upper end. The inner wall and the inner bottom of the body are provided with annular grooves, and heating wires are fixed in the grooves; The outer side of the heating wire is provided with a cuvette; the end cover is hinged on one side of the upper end of the body through a hinge, and the shape of the end cover matches the body; the end cover is provided with a number of drain holes, and the end cover The lower end on the side opposite to the hinge protrudes downwards to form a card platform, and the upper end of the body is provided with a card slot on the side opposite to the hinge, and the card platform and the card slot are aligned.

In this embodiment, during operation, the diode sample is placed in the reaction kettle 5, the end cover is put on to clamp the card table into the card slot, the acid solution is poured into the reaction kettle 5 through the drain hole on the end cover, and the electric heating The wire is energized to generate heat to heat the reactor 5, and the diode sample is corroded in the reactor 5. After the first corrosion, the reaction kettle 5 can be tilted directly through the cylinder 7 and the telescopic rod 8 without manually opening the end cover, and the reacted acid solution can be poured out of the reaction kettle 5 from the drain hole, and the used acid solution can be discharged from the guide groove. 2 into the waste liquid collection tank 10 for centralized treatment. In this embodiment, the cylinder 7 is fixed on the box body 1 by hexagonal bolts, so that the cylinder 7 can be stably and reliably fixed on the box body 1, and the operation of the cylinder 7 is more stable. The transparent box cover 4 is convenient for observing the reaction conditions in the reactor 5, and prevents the volatilized acid liquid from escaping into the environment during the experiment to cause harm to the operator and reduces the risk of the experiment. The support arm 3 is set to support and fix the reaction kettle 5, and a wire groove can be arranged in the support arm 3 to facilitate power supply to the reaction kettle 5. The balance state of the reactor 5 can be adjusted by arranging the cylinder 7, the telescopic rod 8 and the connecting rod 9, so that the reactor 5 can be kept in balance during use, and the reactor 5 can be easily tilted to allow the acid solution to flow out after the reaction. The guide groove 2 and the waste liquid collection box 10 are provided to facilitate the centralized recovery and treatment of the used acid liquid, so as to avoid pollution and damage to the environment caused by improper discharge of the acid liquid. The temperature in the cylinder 7, the telescopic rod 8 and the reactor 5 is controlled by the control box 6, the operation is more convenient, and the reactor 5 is not manually touched, which is safer, and human factors have less influence on the experimental results. This scheme can complete the repeated heating and corrosion of the experiment through the cylinder 7, the telescopic rod 8, the support arm 3, and the reactor 5. The operator does not need to directly contact the reactor 5. The box 1 is set to support, protect and isolate the whole, and the waste liquid is set. The collection box 10 performs centralized recovery and treatment of the waste acid liquid, which makes the experiment less dangerous, reduces environmental pollution, is more environmentally friendly, and is more convenient for failure analysis experiments on diodes.

What has been described above is only an embodiment of the present invention, and common knowledge such as specific structures and/or characteristics known in the scheme will not be described too much here. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present invention, several modifications and improvements can also be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (4)

1. Diode failure analysis device, it is characterized in that, comprise casing, reaction kettle, the upper end of described casing is provided with feed inlet, and one side of described casing inner wall is fixed with two lateral support arms that are arranged side by side, so The middle part of the reaction kettle is hinged between the free ends of the two support arms; a vertically installed cylinder is fixed on the inner wall of the top of the box, the output end of the cylinder is connected with a telescopic rod, and the free end of the telescopic rod is hinged with a connecting rod. Rod, the other end of the connecting rod is hinged on the bottom of the reaction kettle near the cylinder side; the inner wall of the box below the support arm is provided with a guide groove inclined downward, and the bottom of the box is provided with a waste liquid collection box. The lower end of the guide groove extends into the waste liquid collection box. 2 . The diode failure analysis device according to claim 1 , wherein a control box is provided on the top of the box, and the control box is respectively connected to the cylinder and the reactor for signals. 3 . 3. The diode failure analysis device according to claim 2, characterized in that: the cylinder is fixed on the box by hex bolts. 4. The diode failure analysis device according to claim 3, characterized in that: the upper end of the box is hinged with a transparent box cover for covering the feed inlet.