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brief discussion on the classification of circuit boards
With the development of electronic technology, circuit boards are used in various fields. Do you know the classification of flexible circuit boards? Let me explain to you the circuit board flexible board.
.Single-sided flexible board has only one layer of conductor and can have a covering layer or no covering layer on the surface. The insulating base material used varies with the application of the product. Commonly used insulation materials include polyester, polyimide, polytetrafluoroethylene, soft epoxy-glass cloth, etc.
. Double-sided flexible board with two layers of conductors. The applications and advantages of this type of double-sided flexible board are the same as those of single-sided flexible boards. Its main advantage is to increase the wiring density per unit area. It can be divided into with or without metallized holes and with or without covering layer: without metallized hole, without covering layer without metallized hole, with covering layer with metalized hole, without covering layer with metalized hole. , with covering layer. Double-sided soft fabrics without covering layer are less commonly used.
3. Multi-layer flexible board
Flexible multi-layer boards, like rigid multi-layer boards, can be made into multi-layer flexible boards by using multi-layer lamination technology. The simplest multi-layer flexible board is a three-layer flexible board formed by covering both sides of a single board with two layers of copper shielding layers. This three-layer flexibility is electrically equivalent to coaxial wire or shielded wire. The most commonly used multi-layer flexible board structure is a four-layer structure, using metallized holes to achieve inter-layer interconnection. The middle two layers are generally the power layer and the ground layer.
The advantages of multi-layer flexible boards are that the base film is light in weight and has excellent electrical properties, such as low dielectric constant. The multi-layer flexible board made of polyimide film as the base material is about /3 lighter than the rigid epoxy glass cloth multi-layer board, but it loses the excellent flexibility of single-sided and double-sided flexible boards. Flexibility is not required for most such products.
Zhongtian Yuan Circuit Board Co., Ltd. is a high-tech enterprise in Zhengzhou specializing in the R&D, production and processing of B circuit boards, multi-layer printed boards, and aluminum substrates
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