News
2022/12/30
What is the density of epoxy board
The molecular structure of epoxy resin is characterized by the presence of active epoxy groups in the molecular chain. The epoxy groups can be located at the end, middle or ring structure of the molecular chain. They can cross-link with various types of curing agents to form insoluble, non-fusible polymers with three-dimensional network structure, with specification thickness of 0.5 to 100 mm, and are subject to thermal deformation at high temperature of 180 ℃. Generally, they are not heated together with other metals, which may cause metal sheet deformation.
Detail
Manufacturing process of aluminum substrate
2023-11-29
Aluminum substrate is a kind of metal copper clad plate with good heat dissipation. Generally, the single plate is a three-layer structure, which is composed of circuit layer (copper foil), insulation layer and metal substrate. It is also applicable to high-end occasions, such as circuit layer, insulation layer, aluminum base, insulation layer, circuit layer, etc. It is rarely used as multilayer board, and can be bonded with ordinary multilayer board, insulating layer and aluminum base adhesive.
Understand the judgment and selection of copper clad plate
2023-11-29
Through hole is one of the important components of multilayer PCB. We have introduced the meaning and characteristics of through hole, blind hole and buried hole in HDI board and how to judge the reliability of blind hole in the last issue of Through Hole Knowledge in High-density PCB Circuit Board Design.
What is the processing effect of precision grinder?
2023-11-29
The precision required for grinding cylindrical rollers is usually higher, and the basic flatness is within 0.005. Cylindrical rollers are usually matched with high-precision bearing rings. Many P4 bearings are processed by this high-precision double-end grinder, which greatly improves the precision space.
2023-01-18
The tape master roll is mainly based on BOPP film master roll. After the BOPP film is processed by high-voltage corona tape master roll, the surface of one side is rough. The semi-finished master roll is then heated and evenly coated with water-based pressure sensitive adhesive tape master roll. Many people thought it was the tape used to listen to songs before, but it was not.
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