PCB News - How many materials are on the circuit board and what symbols are used to indicate

How many materials are on the circuit board and what symbols are used to indicate

PCB has developed from a single layer to a multi-layer circuit board, and still maintains their own development trends. Due to the continuous development of high precision, high density and high reliability, continuous reduction in size, cost reduction, and performance improvement, the printed circuit board will still maintain a strong vitality in the future development of electronic equipment. After electronic equipment adopts printed boards, due to the consistency of similar printed boards, manual wiring errors can be avoided, and electronic components can be automatically inserted or mounted, automatic soldering, and automatic detection, ensuring the quality of electronic equipment, Improve labor productivity, reduce costs, and facilitate maintenance.

Material of PCB board:

22F single-sided composite substrate: single-sided semi-glass fiber board. (Generally, it can be punched, if the requirement is high, computer drill)

CEM-1 Single-sided composite substrate: This material requires CNC drilling. (Generally, it can be punched, if the requirement is high, computer drill)

CEM-3 double-sided composite substrate: the lowest low-end double-sided material, which is a semi-glass fiber material. (Except for double-sided cardboard, it is the lowest-end material for double-sided boards. Simple double-sided boards can use this material, which is about 5-10 yuan/㎡ cheaper than FR-4).

FR-4 Epoxy Fiberglass Board: The most commonly used material for PCB circuit boards (PCB multi-layer circuit board factories).

PCB board fire rating classification: According to the UL standard, the substrate combustion characteristics can be divided into the following four categories from high to low: UL-94V0, UL-94V1, UL-94V2, UL-94HB.

Semi-cured film: used to make multi-layer PCB boards, commonly used models are 1080, 2116, 7628 and other specifications.

94HB cardboard: the most common cardboard material, basically used to make low-grade single-sided panels, and the price is cheap. Because it has no flame-retardant effect, it cannot be used for a series of products with fire-proof requirements such as power supplies.

94V0 cardboard: cardboard material with flame retardant effect. Compared with 94HB cardboard material, flame retardant is added to its composition. (Die punching)

Summarizing the domestic and foreign discussions on the future development trends of printed circuit board manufacturing technology are basically the same, that is, toward high density, high precision, fine aperture, fine wire, fine pitch, high reliability, multilayer, high-speed transmission, and light weight., The development in the direction of thinness, in terms of production, at the same time, to increase productivity, reduce costs, reduce pollution, and adapt to the development of multi-variety, small-batch production. The technical development level of printed circuits is generally represented by the line width, aperture, and board thickness/aperture ratio of the printed circuit board.

As a professional circuit board factory, the Circuit Technology Co., Ltd. focuses on high-precision double-sided/multilayer circuit boards, high-end HDI boards, thick copper circuit boards, blind buried vias, high-frequency circuit boards, and PCB proofing and batch boards. Manufacturing.