Analysis on several forms and causes of unqualified road slab quality Circuit board quality problems generally include circuit short circuit, open circuit, green oil foaming, green oil falling, substrate delamination, board warping, pad falling, poor tin loading and open circuit of circuit board after aging. The basic reason for these common circuit board quality problems [...]
Why is the quality of the same FPC FPC sample often very different from different manufacturers. FPC flexible circuit boards produced by some manufacturers are neat and have excellent touch, golden face and neat reinforcement; The FPC flexible circuit board produced by some manufacturers has all kinds of problems, such as burr, oxidation, uneven reinforcement, [...]
When the circuit board is spliced and connected, the insufficient width of the connecting bridge will cause the deformation of the circuit board. If the width size and stiffness design of the connecting bridge are insufficient, the deformation of the PCB will be exacerbated. Experiments in the circuit board manufacturing factory show that the stiffness [...]
Recently, Xiaomi Youpin crowdfunding set up a handheld laser engraving machine, which can easily carve on metal, wood, leather, plastic and other materials. As far as linear motor knows, this product adopts integrated design and high-speed galvanometer technology scheme, which can realize 600mm / s fast engraving, and small volume can also meet the needs [...]
Circuit board engraving machine is a kind of equipment that directly carves circuit graphics and makes circuit boards by using mechanical engraving technology. The use of this equipment can reduce a lot of unnecessary manual strength and improve work efficiency. We all know that the production of circuit board is one of the most critical [...]
1、 Methods of checking the plate: 1. Observation method: whether there is burning paste, burning, blistering, board surface broken line, socket corrosion. 2. Meter measurement: + 5V, GND resistance is too small (below 50 ohm). 3. Power on inspection: for the damaged board, slightly increase the voltage by 0.5-1v. After starting up, use the IC [...]
Circuit board quality guarantee Party A: Nanning Hongchen Communication Technology Co., Ltd. Party B: (hereinafter referred to as Party A and Party B) 1. Scope In order to ensure Party B provides Party A with high-quality products and services, meets Party A's quality requirements and avoids loss due to product quality or service problems, both [...]
Three proofing paint brushing Three proofing paint using brushing process is the most convenient and effective way of operation, this way of operation, for some circuit board surface components are more regular, circuit board area is relatively small, it is best on a surface, components distribution can not be too dense, different height, must ensure [...]
Electronic SMT chip processing circuit board packaging technology, cob packaging if the bare chip is directly exposed to the air, easy to be polluted or artificially damaged, affect or damage the function of the chip, so the chip and bonding wire are encapsulated with glue. It is also called soft encapsulation. COB package is called [...]
Printed circuit boards, also known as printed circuit boards, are suppliers of electrical connection of electronic components. Printed circuit board is usually represented by "PCB", but not "PCB". In this article, we will talk about several common standards of printed circuit board. Several common standards of printed circuit board 1) Ipc-esd-2020: Joint standard for the [...]