Prevention cost refers to the cost paid to prevent the occurrence of quality defects; Appraisal cost refers to the cost paid for testing, inspection and inspection in order to assess whether the product has the specified quality; Internal defect cost refe
Except for the elemental metals, the compounds are electric and have no good superconductors or even heat conduction (which is also the key to the formation of the route to disperse or propagate quantitative).
Basically, the goal of setting up the test area is to test the components on the circuit board for specification and weldability.
especially since The State Council issued Several Policies to Promote the High Quality Development of the Integrated Circuit Industry and Software Industry in the New Era this year, the integrated circuit industry has become a new industry tuyere.
PCB with insulation board as the base material, at least attached with a conductive graphic, and cloth holes, used to replace the chassis of the previous device electronic components, to achieve the mutual connection between electronic components.
Before the advent of the printed circuit board, the interconnection of electronic components relied on wires directly connected to form a complete circuit. Now, printed circuit boards in the electronics industry has become the dominant position.
How to choose PCBA processing solder paste: (1) according to the value and use of pcb circuit board products,(2) according to the storage time of PCB and components and surface oxidation degree determines the activity of solder paste. (3) Select solder pa
Specific ways to improve the patch rate:1, load distribution balance, 2, SMT SMT machine itself.
PCB industry is technology-intensive and capital-intensive, but it is still labor-intensive. A large number of automation equipment needs manual operation and assembly line operation. A medium-sized PCB enterprise has thousands of employees.
Chemicals should be stored in designated areas, away from the work area, and at a specified safe distance, and must be equipped with safety facilities.
Common ceramic-based boards are alumina circuit board, beryllium oxide circuit board, aluminum nitride circuit board, silicon nitride circuit board.
PCB circuit board copper wire stripping is not good, PCB factories are said to be laminate problems, requiring its production factories to withstand losses.
