Dec. 29, 2021
Dry film is a polymer compound. It can produce a polymerization reaction after ultraviolet irradiation to form a stable substance attached to the plate surface, so as to achieve the function of blocking electroplating and etching
Dec. 27, 2021
Brown oxidation and black oxidation in the PCB manufacturing process are to increase the adhesion between the original board and PP (prepreg).
Dec. 24, 2021
The hole wall copper is divided into several points, porthole, innerside & porthole of other side. If the hole copper is uneven, it will affect the increase of hole resistivity, thus affecting the conductivity of metallized holes. The best copper plating quality of hole wall requires that the thickness of the copper in the hole is uniform, and the thickness should be greater than 18um, and military products will have good conductivity if the thickness is greater than 25um.
Dec. 24, 2021
Compared with the traditional CCD semi-automatic exposure machine, LDI has many advantages. For example, it does not need film, which reduces the film production cost and shortens the sample delivery time.
Dec. 22, 2021
LDI exposure machine is easier to realize automatic operation, saves labor cost, greatly improves product quality and avoids defective rate.
Dec. 20, 2021
Photoresist etching is also used as another key step in the production of printed circuit boards. Protecting the copper required during etching requires a balance between removing unwanted copper and retaining the resist in place.
