SMT chip processing of TV motherboardCauses of distortion and tombstone in the processing of PCBA in Hong Kong Hong Kong PCBA processing distortion is a frequent problem in PCBA mass production. It w
SMT chip processing of TV motherboard
Causes of distortion and tombstone in the processing of PCBA in Hong Kong
Hong Kong PCBA processing distortion is a frequent problem in PCBA mass production. It will have a considerable impact on assembly and testing. Therefore, such problems should be avoided in production.
There are several reasons for the distortion of PCBA in Hong Kong:
1. The PCBA processing in Hong Kong itself is not properly selected. For example, the T of the PCB is low, especially the paper-based PCB. The processing temperature is too high and the PCB becomes bent.
2. The PCBA processing design in Hong Kong is unreasonable. The uneven distribution of components will cause excessive thermal stress on the PCB. Large-sized connectors and sockets will also affect the expansion and contraction of the PCB, resulting in permanent distortion.
Which is better for PCBA processing in Hong Kong
3. Hong Kong PCBA processing design issues, such as double-sided PCB, if the copper foil on one side is too large, such as ground wire, and the copper foil on the other side is too small, it will also cause uneven shrinkage on both sides and deformation.
4. Improper use of the fixture or the distance between the fixtures is too small, for example, the finger grip of wave soldering is too tight, the PCB will expand and deform due to the welding temperature.
5. The high temperature in the reflow soldering of PCBA processing in Hong Kong will also cause distortion of the PCB.
Hong Kong PCBA processing, chip components often appear to stand up phenomenon, known as standing monument. Also known as the suspension bridge, Manhattan phenomenon, the same kind of welding defects, so many names appear, it can be seen that the defects of the tombstone often occur and are paid attention to by people.
The root cause of PCBA processing tombstone phenomenon in Hong Kong is the unbalanced wetting force on both sides of the component, so the torque at both ends of the component is also unbalanced, which leads to the tombstone phenomenon.
Tag: Hong Kong PCBA processing
小批量SMT贴片加工的费用
有的时候SMT贴片要求赶货的那时候，就想随意找一家SMT贴片加工厂，但是很多都会碰到，生产厂家不想要接这一单子，不划算，不然是成批的单子。在量小的情况下，归根结底的耗损大，更是时长上的耗损，由于同一时间段下，SMT贴片加工量大的生产率更高，以至于在生产了一个早晨或者一天之后，又要混日子在做项目前期上面。
下面的SMT贴片制造商将告诉你为什么有小批量打样的费用。
SMT贴片加工
一、一个小批量,SMT贴片转换成本太高了。人力物力的投入无法弥补成本费用。比如，你打100片，那样昂贵的设施支付你的折旧成本费用，是真的不值。要不然顾客与这种加工厂有长期合作。在不思量成本的情况下。由于在SMT贴片加工前，无论成批SMT贴片加工、小批量SMT贴片加工前，要求做的项目前期是一样的，如：SMT贴片加工机编程、PCB定位、开机打个首样确定这类。
二、另有一些SMT贴片加工厂不想要接小定单，由于生产加工的成本费用都不一样，有的生产厂家会挑选吻合自个的用户来，有的SMT贴片加工厂会专做的服务客户，由于量大，订单也较为沉稳，相对来说单品盈利不会太高，把握一些数量的客户就不用去操劳去接散单及各有不同因素吧；
三、只需有过SMT贴片加工教训的人都了解，SMT贴片加工用度普通以元器件点数多少来估算，一个贴片（电阻0603、0805、电容、二极管）算一个点，一个三极管算1.5个点，IC四个脚算一个点，统计pcb板上所有贴片点数。加工成本=点数*1个点的成本价（加工费中包括：红胶、锡膏、洗板水等辅料花费）假若SMT贴片加工点数太少，就根据SMT贴片加工工厂的最低消费500元估算。
标签: SMT贴片加工
台湾SMT贴片加工的益处
随着科学技术的进步，电子行业发展以及电子商业化，电子智能开始逐渐的融入我们的日常生活，最常用的有手机、电视、电热水器、万能遥控器、电控玩具这些。这些全是使用线路板支持工作的，微小型的电路板，必须使用SMT贴片加工出来的电路板，才可以开始工作。
SMT贴片加工以组装密度高、电子设备体积小、高频特性好等优点获得了很多生产厂家的认可。
SMT贴片加工的优势主要表现在以下内容：
SMT贴片加工
1、电子设备体积小，贴片元器件的体积只有传统式插装元器件的1/10左右，通常SMT贴片加工以后，电子设备体积缩小40%~60%。
2、功效且成本低，SMT贴片加工容易实现自动化，提升生产效率，节约材料、能源、设备、人力、时间等，控制成本达30%~50%。
3、重量轻，贴片元器件的净重也只有传统式插装元器件的10%，通常采用SMT以后，净重减轻60%~80%。
4、可靠性高，抗振能力强。
5、高频特性好，降低了电磁和射频干扰。
6、焊点缺陷率低。
标签: SMT贴片加工
