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Principle of PCBA strain testing
By using the strain effect of metal conductors, the strain gage attached to PCBA can be quantified by the change of its own resistance value when PCBA deforms and becomes mechanically deformed. The quantified strain can be compared with the ultimate strain to determine the risk of PCBA deformatio...Read more -
Why strain test PCBA?
In order to adapt to the increasing international attention to environmental protection, PCBA changed from lead to lead free process, and applied new laminate materials, these changes will cause PCB electronic products solder joint performance changes. Because component solder joints are very sen...Read more -
What are PCB and PCBA?
Printed circuit board (Printed circuit board, referred to as PCB) is a substrate for assembling electronic parts, and is a printed board that forms point-to-point connections and printed components on a general substrate according to a predetermined design. The main function of PCB is to make a v...Read more -
Q&A of ISO 26262 （Part Ⅲ）
Q9: If the chip passes ISO 26262, but it still fails during use, can you give a failure report, similar to the 8D report of the vehicle regulations? A9: There is no necessary relationship between chip failure and failure of ISO 26262, and there are many reasons for chip failure, which may be int...Read more -
Q&A of ISO 26262 （Part Ⅱ）
Q5: Does functional safety mean the whole system, or a single chip? A5: Functional safety refers to the concept at the level of related items (the system or system group that directly performs functions or partial functions (that is, functions visible to users) at the vehicle level, after being ...Read more -
Q&A of ISO 26262（PartⅠ）
Q1: Does functional safety start with design? A1: To be precise, if it is necessary to comply with ISO 26262 products, relevant safety activities should be planned at the beginning of the project, a safety plan should be formulated, and the implementation of safety activities within the plan sho...Read more -
Introduction to double beam scanning electron microscopy (DB-FIB)
Important equipment for microanalysis techniques include: optical microscopy (OM), double-beam scanning electron microscopy (DB-FIB), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Today’s article will introduce the principle and application of DB-FIB, focus...Read more -
TEM Introduction
Transmission Electron Microscope (TEM) is a microphysical structure analysis technique based on electron microscopy based on electron beam as a light source, with a maximum resolution of about 0.1nm. The emergence of TEM technology has greatly improved the limit of human naked eye observation of ...Read more -
AEC-Q verification of vehicle grade chips
Q1: Is MSL3 the lowest PC level for AEC? A1: The MSL level of Procon needs to refer to IPC/JEDEC J-STD-020 and the client’s usage requirements. Q2: How to choose 40H and 52H of fast MSL3? A2: Fast MSL3 needs to pay attention to the ev value, the ev value is mostly tested by the JESD22-A12...Read more -
GRGT assisted InventChip with the certification completion of automotive-level SiC power devices
GRGT assisted InventChip Technology Co., Ltd. (InventChip) with the certification completion in a series of silicon carbide (SiC) MOSFET products, implementing the power device products of InventChip on the final stage of their three-step strategy in designing, mass production and automotive-leve...Read more -
GRGT was awarded the qualification of abnormal noise and environmental reliability testing capabilities by BMW Brilliance
Under the strict review, GRG Metrology & Testing Group Co., Ltd. (GRGT, 002967.SZ) has been approved the certification by BMW Brilliance for the 2023 abnormal noise and environmental reliability testing and evaluation recently, becoming one of the few domestic third-party institutions that ca...Read more -
GRGT establishes the first automotive wiring harness “Top Runner” group standard project in China
As the first automotive wiring harness group standard in China, <Quality Classification and Requirements of “Top Runner” Evaluation – Automotive Wiring Harness> has been officially issued. Led by GRGT, the edition project started in July, jointly carried out by China Natio...Read more
