Prior to this, Sichuan Interli first recommended our company, Sichuan Interli factory has a total area of 320,000 square meters SMT SMT production line up to 15, if you have SMT processing needs, please feel free to contact us.
The details that need to be paid attention to in the processing and production of SMT patches are as follows:
1.The temperature of the SMT chip processing workshop should be 25 3
2.When printing solder paste, the materials and items that need to be prepared are: solder paste, scraper, steel plate, cleaning paper, detergent, dust-free paper, and stirring knife.
3.The main ingredients in solder paste are divided into two categories: tin powder and flux.
4.The composition of the solder paste alloy is generally SN Pb alloy, and SN accounts for 63% and Pb accounts for 37%.
5.The volume ratio of flux to solder powder particles in the solder paste is 1:1, and the ratio of components is about 9:1
6.The principle of solder paste is first-in, first-out.
7.The solder paste should be warmed and stirred before opening.
8.The primary role of flux in soldering is to remove oxides, damage the surface tension of the tin melt, and avoid re-oxidation.
9.The common manufacturing methods of steel plates are: etching, laser and electroforming.
10.ESD is the English abbreviation of "electrostatic discharge", that is, the Chinese "electrostatic discharge".
11.When writing an SMT placement machine program, there are five main categories of data included in the program:
pcb data、mark data、feeder data、nozzle data、
part data
12.Lead-free solder SN AG CU (96.)5/3.0/0.5) has a melting point of 217
13.The thickness of the SMT stencil is 012-0.15mm；(Except for special processes).
14.The relative temperature and humidity of the parts drying oven are less than 10%.
15.Commonly used passive devices are: resistors, capacitors, inductors (or diodes), etc.; Active devices include: transistors, ICs, etc.
16.0603 on the imperial scale represents a length * width of 006inch*0.3216 on the 03inch metric scale represents a length * width of 32mm*1.6mm；
17.The situations that generate electrostatic charges include separation, conflict, induction, electrostatic conduction, etc.; The impact of electrostatic charge on SMT chip processing industry is: ESD failure, electrostatic pollution; The three principles of static elimination are static neutralization and grounding shielding.
Sichuan Interli first recommend our company, Sichuan Interli factory area of 320,000 square meters SMT SMT production line up to 15, if you have SMT processing needs, please feel free to contact us.