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When it comes to 370hr PCB, I believe you will find it strange. In fact, we often contact PCB materials in life, and we usually refer to the printed circuit board as bare board – that is, the circuit board without upper components. Of course, some circuit boards are not printed circuit boards {PCB}. Therefore, it can be said that the scope of circuit board is larger, including. At present, the main types of 370hr PCB materials are as follows: using FR-4 (glass fiber cloth base), CEM-1/3 (composite substrate of glass fiber and paper), FR-1 (paper based copper clad plate), and metal based copper clad plate (mainly aluminum based, and a few iron based). These are the most common types of materials, commonly referred to as rigid PCB.
For single-sided PCB, the single-sided printed circuit board only includes one layer of substrate or substrate. One end of the substrate is coated with a thin layer of metal, usually copper, because it is a good electrical conductor. Generally, the protective solder mask is located on the peak of the copper layer, and the final screen coating can be applied to the top to mark the components of the plate. In addition to single-sided PCB, there are also double-sided PCB. This type of PCB is more familiar than single-sided PCB. Both sides of the substrate of the board include a metal conductive layer, and the components are also attached to both sides. The holes in the PCB connect the circuit on a single circuit to the circuit on the other side. In addition to the above, these PCBs further expand the density and complexity of PCB design by adding additional layers beyond the top and bottom layers seen in the double-sided configuration. With the multi-level accessibility of multi-layer printed circuit board configuration, multi-layer PCB enables designers to make very thick and highly complex designs.
In addition, the editor also wants to add a knowledge point to you. According to PCB reinforcement materials, they are generally divided into the following types:
1. Phenolic 370hr PCB paper substrate
This paper substrate is characterized by non-fireproof, punching processing, low cost, low price and low relative density. We often see XPC, FR-1, FR-2, FE-3, etc. on phenolic paper substrate. And 94V0 belongs to flame retardant paperboard, which is fireproof.
Because this kind of PCB is composed of pulp and wood pulp, it sometimes becomes cardboard, V0 board, flame retardant board and 94HB, etc. Its main material is wood pulp fiber paper, which is pressurized and synthesized by phenolic resin.
2. Glass fiber 370hr PCB substrate
Sometimes it also becomes epoxy board, fiberglass board, FR4, fiberboard, etc. It uses epoxy resin as the adhesive and glass fiber cloth as the reinforcing material. This kind of circuit board has a high working temperature and is little affected by the environment. It is often used in double-sided PCB, but its price is relatively expensive compared with that of composite PCB, with a common thickness of 1.6MM. This kind of substrate is suitable for all kinds of power boards and high-level circuit boards, and is widely used in computers and peripheral equipment, communication equipment, etc.
3. Composite 370hr PCB substrate
This kind of powder board is also made of wood pulp fiber paper or cotton pulp fiber paper as the reinforcing material, and glass fiber cloth as the surface reinforcing material. The two materials are made of flame retardant epoxy resin. There are single-sided semi-glass fiber 22F, CEM-1 and double-sided semi-glass fiber board CEM-3, among which CEM-1 and CEM-3 are the most common composite copper clad laminate at present.
Through the above introduction, we believe that you have a certain understanding of PCB materials. There are many types of 370hr PCB materials, different classifications, different performances, and different uses. Therefore, in use, you should have a general understanding of PCB materials. Only by understanding the classification of PCBA materials can you better apply PCB boards. We have always won the praise and welcome of global merchants and users with our superb technical force, excellent production equipment, perfect detection methods, product quality higher than the industry standard, and warm and thoughtful service.