Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050063
Pengpeng Liu, Chengwei Zhang
The electrostatic sensor can measure the level of engine exhaust electrostatic charge, based on electrostatic induction principle between the inducing charge and conductors. This paper proposes the basic design theory of the electrostatic sensor by building electrostatic sensor function and physical models. This study is significant for designing and manufacturing of a probe-type electrostatic sensor. In order to verify the effectiveness of the designed electrostatic sensor, there is a successful application in the aviation engine test process based on the aviation engine exhaust gas electrostatic monitoring principle and system. There were measured noise signals from electrostatic collection system, the electrostatic signals of an old engine starting process and a new engine for the first time test. These two types of signals reveal the basic form of the electrostatic signal changes and describe the levels of electrostatic charge in the Turbo-engine exhaust gas. The signal showed different characteristics conforming theoretical analysis for detecting early faults.
{"title":"The study of turbo-engine early fault detection technology based PHM sensor","authors":"Pengpeng Liu, Chengwei Zhang","doi":"10.1109/ICRMS.2016.8050063","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050063","url":null,"abstract":"The electrostatic sensor can measure the level of engine exhaust electrostatic charge, based on electrostatic induction principle between the inducing charge and conductors. This paper proposes the basic design theory of the electrostatic sensor by building electrostatic sensor function and physical models. This study is significant for designing and manufacturing of a probe-type electrostatic sensor. In order to verify the effectiveness of the designed electrostatic sensor, there is a successful application in the aviation engine test process based on the aviation engine exhaust gas electrostatic monitoring principle and system. There were measured noise signals from electrostatic collection system, the electrostatic signals of an old engine starting process and a new engine for the first time test. These two types of signals reveal the basic form of the electrostatic signal changes and describe the levels of electrostatic charge in the Turbo-engine exhaust gas. The signal showed different characteristics conforming theoretical analysis for detecting early faults.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132842397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050097
Wen-jun Wang, Ai-yong Du, Juanli Lv, Le Li, Chunhui Qiu
This study analyzed the process of reliability assessment for a turbine-driven auxiliary feedwater (AFW) pump according to the date of a domestic nuclear power plant, starting from the onsite data collection up to the analysis of these data, and evaluation of the reliability parameter. The content includes scope and boundary definition of a turbine-driven AFW pump, reliability data collection and analysis, estimation methods of reliability parameter, and calculation and analysis of reliability parameters, such as probability of failure on demand (γ) and rate of failure to run (λ).
{"title":"Reliability analysis of turbine-driven auxiliary feedwater pump of a nuclear power plant","authors":"Wen-jun Wang, Ai-yong Du, Juanli Lv, Le Li, Chunhui Qiu","doi":"10.1109/ICRMS.2016.8050097","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050097","url":null,"abstract":"This study analyzed the process of reliability assessment for a turbine-driven auxiliary feedwater (AFW) pump according to the date of a domestic nuclear power plant, starting from the onsite data collection up to the analysis of these data, and evaluation of the reliability parameter. The content includes scope and boundary definition of a turbine-driven AFW pump, reliability data collection and analysis, estimation methods of reliability parameter, and calculation and analysis of reliability parameters, such as probability of failure on demand (γ) and rate of failure to run (λ).","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130356227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050164
Chao-Kun Hu, Lina Zhou
Function failure was found successively in one type of smart remote controls when using a period of time. With preliminary investigation by electric circuit, low resistance was found between the neighboring pins on failure sample which connected with flexible printed board and rigid printed board, but the pins on good sample were insulated with the others. After peeling off the flexible printed board, black materials which looked like migration were found by stereomicroscope and metallography microscope. With the help of scanning electron microscope and energy dispersive spectroscope (SEM&EDS), it was detected that the materials mainly contained the elements of Cu (about 50 at.%) and S (about 30 at.%), and the two short pins were almost connected with the black materials. As a result, the black materials which connected to the two pins should be copper sulfide (CuS) and cuprous sulfide (Cu2S). The failure process was as the follows. Some active sulfide was on the surface of board, with the bias voltage and moisture, the copper on the pads of board was sulfurized and migrated with electrochemical reaction. The migration materials which connected to the neighboring pins cause micro-short circuit. However, there was no element of Cu on the clean solder mask, and the element of S could not come from the filling material barium sulfate (BaSO4) because barium sulfate were difficult to break down and the element of Ba had not been detected in the black materials. Finally, with further investigation for the manufacturing process of the assembly, the element of S was detected on copper foil after soldering with the solder paste which used in the failure sample, but the element of S could not be detected with the other type of solder paste. It could conclude that the active sulfide should come from some sulfur-containing materials in the flux of solder paste breaking down in soldering. When soldering, the solvent in the flux was difficult to volatilize due to the flexible printed circuit board (FPC) on the top. Some sulfur-containing materials in the solvent would decompose to active sulfide. So, in order to avoid the failure of micro-short, the solder paste without sulfur containing should be used in soldering.
{"title":"Failure analysis for micro-short circuit between two pins in printed circuit board assembly","authors":"Chao-Kun Hu, Lina Zhou","doi":"10.1109/ICRMS.2016.8050164","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050164","url":null,"abstract":"Function failure was found successively in one type of smart remote controls when using a period of time. With preliminary investigation by electric circuit, low resistance was found between the neighboring pins on failure sample which connected with flexible printed board and rigid printed board, but the pins on good sample were insulated with the others. After peeling off the flexible printed board, black materials which looked like migration were found by stereomicroscope and metallography microscope. With the help of scanning electron microscope and energy dispersive spectroscope (SEM&EDS), it was detected that the materials mainly contained the elements of Cu (about 50 at.%) and S (about 30 at.%), and the two short pins were almost connected with the black materials. As a result, the black materials which connected to the two pins should be copper sulfide (CuS) and cuprous sulfide (Cu2S). The failure process was as the follows. Some active sulfide was on the surface of board, with the bias voltage and moisture, the copper on the pads of board was sulfurized and migrated with electrochemical reaction. The migration materials which connected to the neighboring pins cause micro-short circuit. However, there was no element of Cu on the clean solder mask, and the element of S could not come from the filling material barium sulfate (BaSO4) because barium sulfate were difficult to break down and the element of Ba had not been detected in the black materials. Finally, with further investigation for the manufacturing process of the assembly, the element of S was detected on copper foil after soldering with the solder paste which used in the failure sample, but the element of S could not be detected with the other type of solder paste. It could conclude that the active sulfide should come from some sulfur-containing materials in the flux of solder paste breaking down in soldering. When soldering, the solvent in the flux was difficult to volatilize due to the flexible printed circuit board (FPC) on the top. Some sulfur-containing materials in the solvent would decompose to active sulfide. So, in order to avoid the failure of micro-short, the solder paste without sulfur containing should be used in soldering.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128124314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050147
Lingqiang Liang, Yanjun Shen, Quan Cai, Yingkui Gu
In order to solve the problem of the uncertainty of multi-source reliability data, a reliability data fusion method based on improved D-S evidence theory was presented. The confidence level was calculated by using the angle cosine similarity coefficient and its similarity matrix which is as the weight of the data. After the weights are assigned again, they are fused together with the information. By using this method, the causes of the faults can be determined. A major problem that the fusion results are inconsistent with the intuition when the multi-source data information conflicts each other was solved. A case of reliability analysis of a certain diesel engine was presented as an example to illustrate the proposed method. The results showed that the interference of conflicting evidence can be reduced by introducing a similarity coefficient. Furthermore, the fusion efficiency and precision of the model are increased. Not only can the real reasons for the diesel engine faults be identified accurately, but also the identification efficiency of the whole system can be improved.
{"title":"A reliability data fusion method based on improved D-S evidence theory","authors":"Lingqiang Liang, Yanjun Shen, Quan Cai, Yingkui Gu","doi":"10.1109/ICRMS.2016.8050147","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050147","url":null,"abstract":"In order to solve the problem of the uncertainty of multi-source reliability data, a reliability data fusion method based on improved D-S evidence theory was presented. The confidence level was calculated by using the angle cosine similarity coefficient and its similarity matrix which is as the weight of the data. After the weights are assigned again, they are fused together with the information. By using this method, the causes of the faults can be determined. A major problem that the fusion results are inconsistent with the intuition when the multi-source data information conflicts each other was solved. A case of reliability analysis of a certain diesel engine was presented as an example to illustrate the proposed method. The results showed that the interference of conflicting evidence can be reduced by introducing a similarity coefficient. Furthermore, the fusion efficiency and precision of the model are increased. Not only can the real reasons for the diesel engine faults be identified accurately, but also the identification efficiency of the whole system can be improved.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133435888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050169
Jun Gao, Daoping Huang, Xiaobing Li
Environmental stress screening is an effective method to eliminate the potential defects of electronic products. In order to improve the efficiency and effectiveness of environmental stress screening, the acceleration effect was derived and analyzed based on the quantitative environmental stress screening mathematical principles of GJB/Z34. Then the high-temperature aging, temperature cycling, and random vibration acceleration effect evaluation model was proposed, and the test times under conventional stress and accelerated stress were obtained respectively. Finally, the stress acceleration factor was calculated according to the test time between conventional stress and accelerated stress and an example given which proved that the screening was effective.
{"title":"Accelerative effect analysis of quantitative environmental stress screening","authors":"Jun Gao, Daoping Huang, Xiaobing Li","doi":"10.1109/ICRMS.2016.8050169","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050169","url":null,"abstract":"Environmental stress screening is an effective method to eliminate the potential defects of electronic products. In order to improve the efficiency and effectiveness of environmental stress screening, the acceleration effect was derived and analyzed based on the quantitative environmental stress screening mathematical principles of GJB/Z34. Then the high-temperature aging, temperature cycling, and random vibration acceleration effect evaluation model was proposed, and the test times under conventional stress and accelerated stress were obtained respectively. Finally, the stress acceleration factor was calculated according to the test time between conventional stress and accelerated stress and an example given which proved that the screening was effective.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128793260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050126
Chang Hao, Weijing Zhou, Xing Jin, Dapeng Wang
The micro thrust measurement device based on the cantilever beam can provide the evaluation platform for the mechanical properties of satellite micro thrusters, thus improving the reliability of satellites. With the principle of dividing methods of measurement into direct bearing and plume measuring, this thesis introduces several kinds of typical measuring devices based on the cantilever beam structure. The thesis also introduces the current reference force, such as weights, electromagnetic force and electrostatic force, and further introduces the relevant calibration methods. Displacement sensor calibration methods are introduced as well. It is concluded that further study of dip angle, non-axial alignment and other factors should be taken into consideration in order to improve measurement accuracy.
{"title":"Development status of the micro thrust measurement technology based on cantilever beam structure","authors":"Chang Hao, Weijing Zhou, Xing Jin, Dapeng Wang","doi":"10.1109/ICRMS.2016.8050126","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050126","url":null,"abstract":"The micro thrust measurement device based on the cantilever beam can provide the evaluation platform for the mechanical properties of satellite micro thrusters, thus improving the reliability of satellites. With the principle of dividing methods of measurement into direct bearing and plume measuring, this thesis introduces several kinds of typical measuring devices based on the cantilever beam structure. The thesis also introduces the current reference force, such as weights, electromagnetic force and electrostatic force, and further introduces the relevant calibration methods. Displacement sensor calibration methods are introduced as well. It is concluded that further study of dip angle, non-axial alignment and other factors should be taken into consideration in order to improve measurement accuracy.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116396365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050062
H. Mu, Yao Zhang, X. Yi, Li Li, Xiaoyu Yang, Yuan-Yuan Yang
The expanded GO method for multi-functional repairable systems is proposed in this paper. The expanded method was used to analyze the electro-hydraulic control system of an automatic transmission which has the characteristics of multi-function and repairability, and the minimal cut-sets and availability are obtained by the qualitative and quantitative analysis of the method. Finally, the qualitative and quantitative analysis results of the expanded GO method are compared with the qualitative analysis results of FTA and the quantitative analysis results of Monte Carlo to verify its accuracy and applicability.
{"title":"Reliability analysis for an EHCS of automatic transmission based on GO method","authors":"H. Mu, Yao Zhang, X. Yi, Li Li, Xiaoyu Yang, Yuan-Yuan Yang","doi":"10.1109/ICRMS.2016.8050062","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050062","url":null,"abstract":"The expanded GO method for multi-functional repairable systems is proposed in this paper. The expanded method was used to analyze the electro-hydraulic control system of an automatic transmission which has the characteristics of multi-function and repairability, and the minimal cut-sets and availability are obtained by the qualitative and quantitative analysis of the method. Finally, the qualitative and quantitative analysis results of the expanded GO method are compared with the qualitative analysis results of FTA and the quantitative analysis results of Monte Carlo to verify its accuracy and applicability.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117341490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050051
Richa Sharma
This research deals with machine interference problem with additional repairman and warm standby under Bernoulli vacation schedule. Moreover, threshold N-policy is considered for controlling the vacation period of repairman. The first repairman opt a vacation with probability ‘q’ whereas with probability ‘p=1-q’ he would like to stay in the system and continue repair to the next failed machine. On the other hand, the second repairman takes the vacation when the number of failed machine is less than ‘N’. After completion of vacation, if second repairman finds ‘N’ or more failed machine available in the system he instantly stops his vacation and repair the failed machines otherwise he may go for another vacation. Various performance measures are determined using Runge-Kutta (RK) method. Sensitivity analysis is also performed.
{"title":"Threshold N-policy for machine interference problem with additional repairman and spares under Bernoulli vacation schedule","authors":"Richa Sharma","doi":"10.1109/ICRMS.2016.8050051","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050051","url":null,"abstract":"This research deals with machine interference problem with additional repairman and warm standby under Bernoulli vacation schedule. Moreover, threshold N-policy is considered for controlling the vacation period of repairman. The first repairman opt a vacation with probability ‘q’ whereas with probability ‘p=1-q’ he would like to stay in the system and continue repair to the next failed machine. On the other hand, the second repairman takes the vacation when the number of failed machine is less than ‘N’. After completion of vacation, if second repairman finds ‘N’ or more failed machine available in the system he instantly stops his vacation and repair the failed machines otherwise he may go for another vacation. Various performance measures are determined using Runge-Kutta (RK) method. Sensitivity analysis is also performed.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125326651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050046
Junyan Zhang, B. Cai, Yiliu Liu, M. Xie
The accidents occurred in chemical plants often regard as low frequency and high consequence. It is necessary to raise the risk analysis for the petrochemical system to help people to find the weakest process in the whole system thus people can strength the process to improve the safety. In this paper, a methodology by using Bayesian Networks (BNs) to give a model for a chemical plant has been raised. According to the harm extend, the methodology classifies the events into three layers, cause, incident, and accident. Then the application of the methodology is illustrated by analyzing an atmospheric and vacuum distillation unit. The model identifies the most possible cause when an accident happened. After that, mutual information and variety of beliefs are calculated in order to find the most sensitive event of an accident. The study gives suggestions to people of identification the most relevant and weakest point in the plant.
{"title":"Risk analysis of atmospheric and vacuum distillation unit using Bayesian networks","authors":"Junyan Zhang, B. Cai, Yiliu Liu, M. Xie","doi":"10.1109/ICRMS.2016.8050046","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050046","url":null,"abstract":"The accidents occurred in chemical plants often regard as low frequency and high consequence. It is necessary to raise the risk analysis for the petrochemical system to help people to find the weakest process in the whole system thus people can strength the process to improve the safety. In this paper, a methodology by using Bayesian Networks (BNs) to give a model for a chemical plant has been raised. According to the harm extend, the methodology classifies the events into three layers, cause, incident, and accident. Then the application of the methodology is illustrated by analyzing an atmospheric and vacuum distillation unit. The model identifies the most possible cause when an accident happened. After that, mutual information and variety of beliefs are calculated in order to find the most sensitive event of an accident. The study gives suggestions to people of identification the most relevant and weakest point in the plant.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125695895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050045
Jianghua Shen, Chao-Kun Hu, Xiao He
Wave soldering is one of the most widely used soldering methods in the electronics industry. However there are many influences that caused to soldering failure. This article presents a typical case about poor vertical fill failure analysis during wave soldering. Base on a series analysis, such as surface element detected, vertical cross section, thickness of inter-metallic compound (IMC) measurement, energy dispersive spectroscopy (EDS) analysis etc, the poor vertical fill failure is primarily attribute to that the soldering heat is not enough. The contaminated surface and the Ni corroded intensify the failure.
{"title":"Failure analysis for poor vertical fill of ENIG holes","authors":"Jianghua Shen, Chao-Kun Hu, Xiao He","doi":"10.1109/ICRMS.2016.8050045","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050045","url":null,"abstract":"Wave soldering is one of the most widely used soldering methods in the electronics industry. However there are many influences that caused to soldering failure. This article presents a typical case about poor vertical fill failure analysis during wave soldering. Base on a series analysis, such as surface element detected, vertical cross section, thickness of inter-metallic compound (IMC) measurement, energy dispersive spectroscopy (EDS) analysis etc, the poor vertical fill failure is primarily attribute to that the soldering heat is not enough. The contaminated surface and the Ni corroded intensify the failure.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128161521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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