Discussion on Design of Electromagnetic Compatibility of Digital Circuit PCB
Printed circuit board (PCB) is the most basic part of electronic equipment, it is a "bridge" between a ariety of electronic components and the electrical connection With the rapid development of electronic technology, people given the function on the PCB [...]
Analysis of Disturbance Factors in Design of Printed Circuit Board (PCB)
In the continuous development of information technology, electronic products, functions, types, structures are increasingly complex, to promote the PCB design gradually multi-level and high density, PCB design of the electromagnetic compatibility issues have also been valued and attention.Electromagnetic compatibility (EMC) [...]
Copper-clad Laminate Technology Process
Definition and classification of CCL CCL definition—also known as substrate The reinforcing material is impregnated with resin, coated with copper foil on one or both sides, and a plate-like material made by hot pressing is called copper clad laminate (CCL). [...]
Common defects and solutions of FR-4 ( CCL )
FR-4 is the largest amount of CCL, The most widely used product,Its quality not only affects the CCL plant itself, but also seriously affect the processing rate of PCB processing and assembly of electronic products after the pass rate.Therefore, to [...]
How does the board plate blister?
Circuit board plate blister is actually a bad board adhesion problem, and then extended is the surface quality of the board, which contains two aspects: Board cleanliness problem; Surface roughness (or surface energy) problem. All boards on the board surface [...]
Non-Flow prepreg’s flowing glue when pressing
When Non-flow prepreg is applied to the rigid-flex joint plate and the cold plate, neither the cold plate window region nor the junction of the rigid-flex joint plate is intended to flow excessively. But it is necessary for the basic [...]
FR-4 Quality Control
Precautions against Substrate Warpage Starting from the resin formula Using relatively long molecular chains, better flexibility of resin and curing agent, which is an important way to overcome the substrate warpage. Paper-based CCL solved problems of CCL warping effectively since [...]
FR-4 grade distinguish
FR4 CCL is the abbreviation of glass fiber epoxy CCL. FR-4 CCL is divided into the following grades FR-4 A1 grade CCL This grade CCL is mainly used for military、communications、computers、digital circuits、industrial instrumentation、automotive electronics and other electronic products. This grade CCL [...]
Product Introduction Of FR-4
FR4’s formal writing model is FR-4. FR-4 Epoxy Glass Cloth Laminated Sheet, according to the different application, the industry generally known as FR-4 Epoxy Glass Cloth、Insulation Board、Epoxy Board、Epoxy Resin board、Brominated epoxy resin board、FR-4、Fiberglass board、Glass fiber board、FR-4 reinforced board、FPC reinforced board、Flexible [...]