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Shanghai Rongwei Testing Technology Co., Ltd. is an independent third-party authoritative testing ag

  • Coating and Plating

    1. Introduction The technology level and quality of PCB and PCBA products  are also facing serious challenges, along with the high density of electronic products and lead-free of electronic manufacturing. PCB design、production and processing and assembly process needmore strict process and control raw materials. Due to the technique and technology is still in the transition period at present, customer knowledge of PCB manufacturing and assembly exist bigger difference. Sofailures similar to theelectric leakage, open circuit (circuit, hole), rack of fusion and blasting plate layersare of common occurrence.It often causes the quality responsibility of the dispute between suppliers and users,which led to the serious economic loss.Failure analysis of PCB and PCBA failurephenomenon, verification through a series of analysis, identification the reasons for failure and mining failure mechanism make important significance to improve product quality, improve production technology and arbitrate failure accidents. 2. the service objectPrinted circuit board and component (PCB&PCBA) producers:confirm the product quality, analyzes the various problems in the process of production, explore the mechanism of the root of the problem, providereference comments of improving product design and process for production  ;Printed circuit board and subassembly (PCB&PCBA)suppliers/distributors:control incoming quality, increase the use confidence of user, enhance brand value;Printed circuit board assembly (PCBA) overall business: eliminate the potential problems in the process of production in a timely manner, improve the reliability of products, reduce the risk of liability. 3. Produce benefitHelp materials manufacturers understand the status of the product quality, analysis and evaluation about the present situation of process, optimize and improve development plan and production process of product;Find out the fundamental reason for failure in the electronic assembly, provide effective electronics assembly process improvement program, reduce the production cost;Improve the reliability of using and product percent of pass of finished product,reduce maintenance costs, improve enterprise brand and competitiveness;Clear the cause of product failure responsibility, provide the basis for the judicial arbitration. Analyzed types of PCB/PCBA:Rigid PCB, Flexible printed circuit board, Rigid-flex PCB, Metal base copper clad laminate, Communication PCBA, Lighting PCBA 4. the failure mode mainly aimed at (but not limited to)
  • Failure Analysis in Metallic Materials and Parts

    With the rapid development of science and industry, the quality requirements become more and more important to people. Although the quality of materials and the precision of parts have been improved, failure happens occasionally in every walk of life. So it is necessary to get the reason of failure, then we can improve the quality and prevent failure to assure the safe of project. Related industryAuto parts 、Precision Parts、Mould making、Casting-forging-Welding、Heat treatment、Surface protection and other metal industry. Common types of failureDefective design (Structure design is not reasonable、Hardness is not enough、Improper material selection、Material status requirement is not reasonable);Material defects (loose、blow-hole、Segregation、shrinkage cavity、non-metallic inclusion、Flakes、surface corrosion and so on)Casting defects (shrinkage cavity and blow-hole、chill and reverted chill、slag inclusion、poornodulizing、Segregation carbide、casting crack、graphite floatation and so on)Forging defects (Overheating and Overburning、forging crack、hot shotness and copper brittleness、forging folds、high-temperature oxidation、Annealing is not sufficient、forging flakes、forging flow line)Heat treatment defects(hardening crack、surface decarburization、carburize defects、nitriding defects、temper crack and so on)cold machining defects (grinding defects 、cutting defects、cold heading defects、s***ping/extruding/stretching defects and so on) The significance of failure analysis1.To decrease or prevent the same failure, thus to decrease the economics loss and improve the quality of product.2.Provided information for technological development and reform of enterprise; Raise the level of product technology and economic benefits.3.Analysis the disable mechanical parts, and make scientific basis for accident confirmation of responsibility 、 detecting of criminal offence、ruling of liability for damage、insurance services、modification of product quality standard. Common tools of failure analysis(1)Fracture analysisOptical morphology analysis;Microtopography analysis.
  • Failure Analysis of Electronic Components

    The introductionThe rapid development of electronic components and its reliability laid the foundation for modern electronic equipment industry, more attention should be paid to thereliability analysis works.By analyzing the failure mechanisms, finding out the failure causes, feeding back the conclusions, researching and carrying out the corrective actions, the reliability of electronic components can be improved.The purposes of failure analysis for electronic components are to confirm the failure phenomenon, to distinguish the failure mode and failure mechanism, to find out the root cause, to make recommendations for improving the design and manufacturing process, to prevent failure recurring and finally to improve the reliability. Our customersParts Manufacturers Deeply involved in the phasesof design, produce, reliability testing and aftermarket, provide customers the theoretical basis of how to improve product design and process.Assembly plantsDivide responsibilities and provide the claims basis, improve production process, screening component supplier, improve testing technology and circuit design.Devices DealerDistinguish quality responsibility and provide the claimsbasis.Machine usersProvide the basis for improving operating environment and procedures, improve the reliability, establish a corporate brand image and enhance the competitiveness of enterprises. Your benefitsProvide the basis for design and process improvements, guide direction of reliability worksFind out the root cause of failure, propose and implement measures to improve reliabilityImprove product yield and reliability, enhance the core competitiveness of enterprisesClear the responsible party, provide the basis for judicial arbitrate Main failure mechanismsOpen circuit, short circuit, burned, leakage, functional failure, electrical parameter drift, unstable failure. Common techniquesElectrical test1.Connectivity test2.Electrical tests3.Function testsNon-destructive techniques1.X-Ray2.CT Scans3.C-SAMSample preparation techniques1.De-Cap (mechanical De-Cap, chemical De-cap)2.DE passivation layer (Chemical etching, plasma etching)3.Microanalysis technique (FIB, CP)Microscopic morphology techniques1.Optical microscopy2.SEMFailure Point Positioning technology1.Thermal Imaging Microscopy (hot spot)2.LCD hot spot detection technology3.Light emission microanalysis (EMMI)Surface Elemental analysis1.SEM/EDS2.AES3.XPS4.SIMS
  • Polymer Materials

    1.AbstractPeople are constantly put forward various new requirements on the polymer materials as the development of production and science technology. On the whole, the general development trend of technology of polymer materials in the future are high-performance, high functional composite, and intelligent and green. Customer demands for high product and process understanding is different because of the high technology of the new requirements and product requirements. Fracture, cracking, corrosion, discoloration, and so on phenomena occur frequently on polymer material, which often cause the responsibility of the dispute between supplier and user, so lead to a serious economic loss. Then more and more enterprises and units has a new demand for failure analysis of polymer material, which is no longer direct replace material by the previous conventional means, and need to find the root cause and its mechanism of the failure by means of failure analysis method, to improve product quality, process improvement and responsibility to arbitration etc. 2.Service objectPolymer materials manufacturers: in-depth product failure may cause the design, production, process, storage, transportation and so on stage, explore its failure mechanism, to improve product yield and provide basis for optimizing production processes.Assembly plant: responsibility for arbitration; Improve assembly process; To help suppliers terms of the quality of incoming material inspection.Distributors or agents, to provide favorable evidence for the quality responsibility, the responsibility for justice.The machine user: improve product technology and reliability, improve the core competitiveness. 3.Produce benefit1) It can find out fundamental failure reasons for polymer material, and effectively propose improving suggestions for products design and process;2) It can provide improving suggestions for products and process; improve products yield and reliability as well as enhance product competitiveness;3) It can clearly confirm the responsible party of product failure and provide the basis for the judicial arbitration. 4.Main failure mode (but not limited to)Fracture, cracking, corrosion, stratification, bubble, coating shedding, discoloration, abrasion failure etc.
  • Composite Materials

    1.AbstractMore and more composite materials are widely used in our life as the production and the development of science and technology. Composite material is widely used in aerospace, automotive industry, manufacturing and medicine and other fields because it has thermal stability, high strength and stiffness, fatigue resistance performance and many other advantages. and the new requirement of technology and products of high demand, but the customer demands for high product and process understanding is different, so fracture, crack, blasting plate, corrosion failure occur frequently on layered composite material, which is often cause the responsibility of the dispute between supplier and user, so lead to a serious economic loss. At present, more and more enterprises and units have a comprehensive understanding for composite material failure analysis, try to find the root cause of product failure and its mechanism by means of failure analysis, then improve product quality, process improvement and responsibility of arbitration etc. 2.Service object Composite materials manufacturers: in-depth product failure may cause the design, production, process, storage, transportation and so on stage, explore its failure mechanism, to improve product yield and provide basis for optimizing production processes.Distributor or agent: In time for the incoming quality control effectively, provide the basis for product quality responsibility for justice defined.Distributors or agents, to provide favorable evidence for the quality responsibility, the responsibility for justice.The machine user: follow up and feedback suggestion to product process and reliability, improve product yield and core competitiveness. 3.Produce benefit1).Failure analysis can timely make manufacturers and distributors understand the status of the products, and provide effective prevention policy failure of their products;2).It can provide improving suggestions for product and process, improve product yield and as well as enhance product competitiveness;3).It can clear confirm the responsible party of composite material failure and provide the basis for judicial arbitration. 4.Main failure mode (but not limited to)Crack, corrosion and explosion plate delamination, open circuit (line, hole), such as color change failure.
  • Coating and Plating Materials

    1.AbstractThe coating and plating material gradually appear in people's field of vision and develop rapidly and spread all over in our lives as the production and the development of science and technology,. In general, the future of the general development tendency of the coating and plating materials technology is a high-performance, high functional, intelligent and greening etc. Customer demands for high product and process understanding is different because technology with the high requirements of the product and new requirements. Such as cracking, corrosion, discoloration, failure occur frequently on paint and coating material layer, which is often cause the responsibility of the dispute between supplier and user, so lead to serious economic losses. Through the failure analysis of a series of means, try to find the root cause of the failure and its mechanism, which is great significant to improve product quality, process improvement and arbitration is of great significance. 2.Service objectCoating and plating materials manufacturers: clear the quality problems, and further product failure may cause the design, production, process, storage, transportation and so on stage, dig into the root cause of the failure and its mechanism, to improve product yield and provide basis for optimizing production processes.Distributor or agent: incoming quality control, provide favorable evidence for the quality responsibility.The machine user: timely follow-up product reliability, improve the core competitiveness. 3.Produce benefit1) It can effectively assist manufactures and distributors and customers to understand the quality of the products, propose suggestions for the product reliability, improve product yield and reliability as well as enhance product competitiveness;2) It can find out the fundamental reasons of product failure and provides improving suggestions for products and process;3) It can clearly confirm the responsibility party of coating/plating products failure and provide a basis for the judicial arbitration. 4.Main failure mode (but not limited to)Stratification, creaking, corrosion, bubble, coating shedding, discoloration failure etc.
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