How to improve the pass rate of SMT patch processing?

How to improve the pass rate of SMT patch processing?

SMT chip processing has an important indicator for processing quality evaluation, that is, the straight-through rate. In the patch processing. SMT process pass rate refers to the proportion of one-time qualification from production to the last process. 

This parameter can directly reflect the processing capacity of SMT processing plant can directly reflect the quality control of SMT processing plant, the higher the pass-through rate, the higher the capacity.

In order to ensure the straight-through rate of SMT patch processing, we hear most about improving the design for manufacturing (DFM), but to really improve the straight-through rate of smt chip processing, the following five process optimization methods are needed:

1、Improve the pcb circuit board steel mesh design;

2、 Select the right type of solder paste;

3、 Improve the operation method of the printing process;

4、 Improve the indoor/reflow temperature curve; 

5、 Select tooling and improve the process method. 

For the defects of each process, our company gives the following processing ideas, I hope to help you. 

The main reason for the bridge: 

welding pasteSolution ideas: 

(1) reduce the amount of solder paste; 

(2) "large pad narrow window" design, guide solder spreading, especially suitable for steel mesh window can not be reduced.

kingford Electronics Co., Ltd. specializes in providing integrated PCBA electronic manufacturing services, including upstream electronic component procurement to PCB production and processing, SMT patches, DIP plug-ins, PCBA testing, finished product assembly and other one-stop services.

The company gives full play to its competitive advantages in scale procurement and quality control, and has signed long-term cooperation agreements with many electronic component manufacturers at home and abroad and around the world to ensure the quality and stable supply of raw materials, and transfer the benefits to customers.Long-term maintenance of IC, resistors, capacitors, inductors, audiodes and other components procurement advantages, can greatly save customers' inventory costs, improve production turnover efficiency, save time. Currently for the United States, Britain, Japan, Russia, France, Canada, Australia, Romania, Switzerland and other countries and regions to provide PCBA processing services.

We provide PCBA processing services, starting from PCB circuit board production, our own PCB manufacturers (obtained the extremely strict automotive industry TS16949 certification), focusing on the quality of the circuit board and PCBA quality control system. Due to decades of experience in purchasing electronic components, we maintain long-term cooperation with large brands to ensure the original packaging and procurement channels of components. In the packaging process of components, the selection of thousands and Locai solder paste to ensure the reliability of welding, with automatic printing press, Panasonic high-speed placement machine, upper and lower eight temperature zone reflow, AOI automatic optical detector, can effectively ensure the reliability and quality of electronic packaging process. In addition, perfect IPC, IPQC, OQA and other management processes, clear job responsibilities, strict implementation of IPC electronic assembly acceptance standards. For PCBA testing, we have professional engineers to perform 100% batch testing using a variety of test stands, including channels, noise, amplitude, signal, temperature, humidity, drop or to perform customer-specific test plans. All efforts are aimed at becoming a refined PCBA processing factory.