1: The automatic dialing brand of 300,000 mobile phones was abandoned by the market. The manufacturer claimed 10 million from the circuit board supplier. A batch of CDMA mobile phones from a well-known domestic mobile phone manufacturer showed automatic dialing after 3 months of use. Until the phone ran out of power, the court commissioned Fabi to conduct testing and analysis, and found that the resistance value between the two through holes of the PCB was abnormally low. After scanning electron microscopy energy spectrum analysis, it was found that there was abnormal copper element between the through holes. The final result of the case was that the PCB board manufacturer compensated the manufacturer for nearly 10 million yuan.
Two: The manufacturer of the LED display screen with dead lights in batches lost the order and claimed millions from the raw material supplier
A certain company discovered that the dead light phenomenon occurred during the use of a batch of LED displays. Therefore, Through the court's entrustment to the quality supervision department, Fabi was found to be the responsible party for this. Fabi used scanning electron microscopy and energy spectrometer analysis and found that the open circuit failure was caused by an abnormal layer of titanium oxide on the surface of the LED bracket.
Three: A supplier of automobile emergency alarm parts was claimed for cutting corners
A large automobile factory purchased a batch of parts. During use, the car often displayed alarm signals, and this problem has lasted for nearly a year. After a failure analysis by Huabi, it was found that the terminal coating of this component was defective, and the supplier had missing a layer of nickel plating of 3 microns. Accordingly, the automobile manufacturer proposed rectification compensation to the terminal supplier.
Four: A large number of automobile electric window switches are repaired
Responsible for the plate cleaning process
A certain Shanghai automobile group, after the cars produced were delivered to the client , some car owners reported that there was a problem with the window lift, which was good and bad at first and finally stopped working at all. The failure rate of the electric window shutter switches provided by the company is about 1 (that is, the ratio of the number of repairs to the number of factory shipments). Huabi analysis and testing determined that the window lift problem was caused by rapid electrolytic corrosion caused by abnormally excessive chlorine in the electrolytic groove of the electric window switch.
Five: Claims for plagiarizing chip patents and intellectual property rights
A well-known domestic design company designed a chip and applied for a patent. After it was put into the market, it was discovered that there were suspected counterfeit products in the market. The court entrusted Huabi to conduct analysis and identification. Through microscopic observation and comparison using reverse anatomy technology, Fabi found that the layout design of the suspected counterfeit product was extremely similar to the company's patent.
Six: Polishing chips to retain physical evidence and knowing how to purchase components
A large component distributor purchased a batch of components, and the failure rate was very high when used by clients. The merchant entrusted Huabi to conduct appraisal through the court. Fabi used trace evidence analysis technology to compare trademarks, ingredients, wear and scratches, internal chips, etc. and found that there were polishing marks on the surface of this batch of components. In order to re-mark the components, the internal characteristics were significantly different from normal products, so it was necessary to recycle them. Rework material.
Seven: Don’t blame others for electrostatic breakdown of integrated circuits and microhole design defects
An IC design company designed a memory and supplied it to its customers for a period of time. After using it for a period of time, they found that The batch function failed, and the court commissioned Fabi to conduct analysis and identification. Under a scanning electron microscope, it was found that 0.1 micron electrostatic breakdown micropores occurred in the silicon substrate of the chip, causing failure.
Eight: Physical evidence technology investigation found that the computer in the Internet cafe could not run large-scale games. The root cause responsibility lies with the circuit board raw material manufacturer
A well-known computer manufacturer, after the assembled circuit board leaves the factory, consumers When running a large game program, a blue screen will appear, followed by a black screen, crash and other abnormal phenomena. Customer complaints are very serious. Entrust Huabi to find out the cause of the crash. Huabi's analysis found that it was a problem with the PCB board. The wicking of the PCB exceeded the standard, and the migration of copper elements caused the system to crash and black screen.
Nine: The font display becomes skewed for no reason. The product design assumes responsibility
A well-known building access control system manufacturer, the access control system displays fonts with underlines, which are continuous in some places and discontinuous in others, and Occasionally, no failure was found in other functions. After analysis by Fabi, we learned that a certain resistor of this product is prone to overload breakdown when it generates heat after long-term use. The design value of the resistance of this circuit is too small. After the design is improved, the problem disappears.
10: Domestic bearings wear quickly and the surface materials vary greatly
A certain bearing manufacturer found that its bearings were seriously worn after being used for a short period of time. After Huabi analyzed and tested the material composition on the surface of the bearing ball, it was found that the composition and morphology of the 1-micron inner surface of the ball were significantly different from previous batches.
Eleven: Trace physical evidence reveals the big trouble caused by small resistors in car speed
A sensor (used to measure wheel speed signals) produced by an auto parts manufacturer is installed on the engine block. When the operating temperature is -40~150℃, the sensor fails and causes malfunction. Fabi analyzed the failed open-circuit sample and found that it was caused by an abnormality in the resistor raw material. The failure started from the abnormal crack at the intersection between the Sn/Ni resistor and the secondary glass on the circuit board.
Twelve: Motor failure caused by damage to the winding process has nothing to do with the wire harness raw materials
The winding wire of a certain brand of motor is broken, and the winding wire is enameled wire. The motor is used in radiator electronic fans. , the use temperature is relatively high, and the enameled wires that broke when the failed motor broke were all broken at the front end of the motor. Fabi's analysis found that the cause of the problem was fatigue ductile fracture caused by mechanical pre-damage gaps during the winding process.
Thirteen: Analysis and Identification of the Causes of Vehicle Fires in Anhui Province
A public security bureau in Anqing City, Anhui Province entrusted the Huabi Forensic Identification Institute to conduct physical evidence identification on whether the vehicle involved in the case was set on fire or spontaneously ignited. Based on the relevant information provided by the client, the Huabi Forensic Appraisal Institute identified the vehicle involved in the case of Wan H***88 Cadillac SRX sedan being burned. No physical evidence of spontaneous combustion of the vehicle was found. It was found that there was physical evidence of the presence of arson accelerants, and it issued a Identification conclusions of relevant physical evidence.