News
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Company profile
Hangzhou NeoDen Technology Co., LTD., founded in 2010, is a professional manufacturer specialized in SMT pick and place machine, reflow oven, stencil printing machine, SMT production line and other SMT Products. We have our own R & D team and own factory, taking advantage of our own rich expe...Read more -
Types of reflow oven II
Classification according to shape 1. Table reflow welding furnace Desktop equipment is suitable for small and medium batch PCB assembly and production, stable performance, economical price (about 40,000-80,000 RMB), domestic private enterprises and some state-owned units used more. 2. Vertical re...Read more -
Types of reflow oven I
Classification according to technology 1. Hot air reflow oven Reflow oven is carried out in this way by using heaters and fans to heat up the internal temperature continuously and then circulate. This type of reflow welding is characterized by laminar flow of hot air to transfer the heat required...Read more -
110 knowledge points of SMT chip processing part 2
110 knowledge points of SMT chip processing part 2 56. In the early 1970s, there was a new type of SMD in the industry, which was called “sealed foot less chip carrier”, which was often replaced by HCC; 57. The resistance of the module with symbol 272 should be 2.7K ohm; 58. The capac...Read more -
110 knowledge points of SMT chip processing – Part 1
110 knowledge points of SMT chip processing – Part 1 1. Generally speaking, the temperature of SMT chip processing workshop is 25 ± 3 ℃; 2. Materials and things needed for solder paste printing, such as solder paste, steel plate, scraper, wiping paper, dust-free paper, detergent and mixing ...Read more -
Temperature and humidity requirements and management methods of SMT workshop
Temperature and humidity requirements and management methods of SMT workshop There are clear requirements for temperature and humidity in SMT workshop. The importance of SMT for SMT will not be discussed here. Some time ago, 00 science and Technology Group invited our factory to improve the tempe...Read more -
What is Bridging
Bridging Bridge connection is one of the common defects in SMT production. It will cause short circuit between components, and it must be repaired when it meets bridge connection. There are many reasons for bridge connection 1) Quality problems of solder paste ① The metal content in solder paste ...Read more -
Some common problems and solutions in soldering
Foaming on PCB substrate after SMA soldering The main reason for the appearance of nail size blisters after SMA welding is also the moisture entrained in the PCB substrate, especially in the processing of multilayer boards. Because the multilayer board is made of multi-layer epoxy resin prepreg a...Read more -
The factors affecting the quality of reflow soldering
The factors affecting the quality of reflow soldering are as follows 1. Influencing factors of solder paste The quality of reflow soldering is affected by many factors. The most important factor is the temperature curve of reflow furnace and the composition parameters of solder paste. Now the c...Read more -
SMT quality analysis
The common quality problems of SMT work including missing parts, side pieces, turnover parts, deviation, damaged parts, etc. 1. The main causes of patch leakage are as follows: ① The feeding of component feeder is not in place. ② The air path of the component suction nozzle is blocked, the suctio...Read more -
What is AOI
What is AOI testing technology AOI is a new type of testing technology which has been rising rapidly in recent years. At present, many manufacturers have launched AOI test equipment. When automatic detection, the machine automatically scans PCB through the camera, collects images, compares the te...Read more -
The difference between laser welding and selective wave soldering
As all kinds of electronic products are beginning to be miniaturized, the application of traditional welding technology to various new electronic components has certain tests. In order to cater to such market demand, among the welding process technology, it can be said that the technology is cont...Read more
